Attributes { Metadata { String iso_19139_dataset_xml_md5 "f7fe5360379d3f83b5ddfd1c77d88a0e"; String iso_19139_series_xml_md5 "3247873f9d7d1e1ae25dba079db89d0f"; String iso_19139_dataset_xml " SMAP_L3_FT_A_20150707_R13080_001.h5 eng utf8 dataset NSIDC DAAC > National Snow and Ice Data Center DAAC nsidc@nsidc.org http://nsidc.org/daac/ pointOfContact 2014-06-17 ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data ISO 19115-2:2009-02-15 2 column 6000 3 row 6000 3 area false false false SMAP Fixed Earth Grids, SMAP Science Document no: 033, May 11, 2009 SMAP_L3_FT_A_20150707_R13080_001.h5 2016-06-03 creation R13080 20b5b028-1dae-4e66-a6d2-56d548f8b288 TBD … Open Software Foundation A Universally Unique Identifier (UUID) SPL3FTA http://smap.jpl.nasa.gov The ECS Short Name 003 gov.nasa.esdis The ECS Version ID Jet Propulsion Laboratory originator L3_FT_A The Calibration and Validation Version 2 Release of the Level 3 Daily Global Composite Freeze/Thaw State Science Processing Software. Daily global composite of up-to 30 half-orbit L2_FT_A binary freeze/thaw state based on radar backscatter measurements by the SMAP radar during descending and ascending half-orbits at approximately 6 AM or 6 PM local solar time, respectively. The L3_FT_A product provides daily estimates of binary freeze-thaw state, retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm. Data from both AM (descending) and PM (ascending) high-resolution radar coverage are gridded at 3km resolution on a boreal polar grid at 3 km resolution. AM/PM transition flags indicate changes in freeze-thaw state between morning and evening observations. The software that generates the Level 3 FT_A product and the data system that automates its production were designed and implemented at the Jet Propulsion Laboratory, California Institute of Technology in Pasadena, California. onGoing asNeeded 2016-05-01 HDF5 1.8.13 SMAP_L3_FT_A_20150707_R13080_001.qa 2016-06-03 creation R13080 An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule. crossReference grid eng utf8 geoscientificInformation Data product generated by the SMAP mission in HDF5 format with metadata that conforms to the ISO 19115 model. Freeze-thaw binary state is retrieved from high-resolution radar data on both descending (AM, fore/aft) and ascending (PM, fore-only) SMAP half-orbits. The L3_FT_A product includes only data northward of 45N latitude. Freeze-thaw state retrieval is inhibited for areas with permanent snow/ice and excessive static or transient open water in the cell, and when there is excessive RFI in the sensor data. Retrievals may be flagged as questionable for urban areas, mountainous areas with high elevation variability, and for cells in which the seasonal (thawed-frozen) reference difference is much smaller than the radar measurement error. true -180 180 45 85.044502258300781 2015-07-07T00:00:00.000Z 2015-07-07T23:59:59.999Z attribute freeze_thaw Percent of freeze-thaw that are within the Acceptable Range. Percent of freeze-thaw measures in the data product that fall within a predefined acceptable range of measure. directInternal *undefined* percent 100 Percent of Missing Data Percent of grid cells that lack radar data relative to the total number of grid cells that fall within the mission acquisition mask. directInternal *undefined* percent 52.0681571960449 Freeze-thaw state retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm. 2016-06-03T19:08:25.038Z Soil Moisture Active Passive Mission (SMAP) Science Data System (SDS) Operations Facility processor L3_FT_A_SPS L3_FT_A_SPS 2014-04-15 revision 019 Algorithm Theoetical Basis Document (ATBD) SMAP Level3 Radar Freeze/Thaw Data Product (L3_FT_A) 2015-10-13 publication Version 1.0 Soil Moisture Active Passive (SMAP) Freeze-Thaw processing algorithm 2016-03-30 revision 020 Freeze-thaw state retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm. A given measurement is compared to seasonal reference states for frozen and thawed conditions; measurements falling below the threshold are considered to represent frozen states, and measurements exceeding the threshold are considered to represent thawed states. Algorithm Theoetical Basis Document (ATBD) SMAP Level3 Radar Freeze/Thaw Data Product (L3_FT_A) 2015-10-13 publication Revision B processingInformation uuid for ParameterVersionID http://smap.jpl.nasa.gov ParameterVersionID string 018 processingInformation uuid for epochUTCDateTime http://smap.jpl.nasa.gov epochUTCDateTime dateTime 2000-01-01T11:58:55.816Z processingInformation uuid for epochJulianDate http://smap.jpl.nasa.gov epochJulianDate float 2.45154e+06 processingInformation uuid for timeVariableEpoch http://smap.jpl.nasa.gov timeVariableEpoch string J2000 A configuration file that lists the entire content of the output Radar Level 3_FT_A_ product. SMAP_L3_FT_A_SPS_OutputConfig_L3_FT_A.xml 2016-06-03 creation R13080 OutputConfig A configuration file that specifies the source of the values for each of the data elements that comprise the metadata in the output Radar Level 3_FT_A product. SMAP_L3_FT_A_SPS_MetConfig_L2_FT_A.xml 2016-06-03 creation R13080 MetConfig A configuration file generated automatically within the SMAP data system that specifies all of the conditions required for each individual run of the Radar Level 3 FT_A Science Processing Software (SPS). SMAP_L3_FT_A_SPS_RunConfig_20160603T190825038.xml 2016-06-03 creation R13080 RunConfig Precomputed longitude at each EASEGrid cell at 3km resolution on north Polar Azimuthal Projection EZ2Lon_N03_002.float32 2013-05-09 creation 002 EASEGRID_LON_N The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L3_FT_A_20150706_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02288_A_20150706T234026_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02288_D_20150707T002936_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02289_A_20150707T011851_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02289_D_20150707T020806_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02290_A_20150707T025721_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02290_D_20150707T034632_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02291_A_20150707T043546_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02291_D_20150707T052501_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02292_A_20150707T061416_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02292_D_20150707T070327_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02293_A_20150707T075242_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02293_D_20150707T084156_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02294_A_20150707T093111_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02294_D_20150707T102022_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02295_A_20150707T110937_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02295_D_20150707T115852_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02296_A_20150707T124807_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02296_D_20150707T133717_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02297_A_20150707T142632_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02297_D_20150707T151547_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02298_A_20150707T160502_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02298_D_20150707T165412_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02299_A_20150707T174327_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02299_D_20150707T183242_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02300_A_20150707T192157_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02300_D_20150707T201108_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02301_A_20150707T210023_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. SMAP_L2_FT_A_02301_D_20150707T214937_R13080_001.h5 2016-06-03 creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 2 FT_A data product. L2_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 2 FT_A product. SMAP Radar Level 2 FT_A SPS 3 Precomputed latitude at each EASEGrid cell at 3km resolution on north Polar Azimuthal Projection EZ2Lat_N03_002.float32 2013-05-09 creation 002 EASEGRID_LAT_N The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time. creation N/A gov.nasa.esdis A Digital Object Identifier (DOI) that provides a persistent interoperable means to locate the SMAP Level 3 FT_A data product. L3_FT_A http://smap.jpl.nasa.gov A short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 3 FT_A product. SMAP Radar Level 3 FT_A SPS 3 A configuration file that specifies the complete set of elements within the input Level 2 FT Product that the Radar Level 3_FT_A Science Processing Software (SPS) needs in order to function. SMAP_L3_FT_A_SPS_InputConfig_L3_FT_A.xml 2016-06-03 creation R13080 InputConfig SMAP Handbook 2014-07-01 publication JPL CL#14-2285, JPL 400-1567 SMAP http://smap.jpl.nasa.gov The SMAP observatory houses an L-band radiometer that operates at 1.414 GHz and an L-band radar that operates at 1.225 GHz. The instruments share a rotating reflector antenna with a 6 meter aperture that scans over a 1000 km swath. The bus is a 3 axis stabilized spacecraft that provides momentum compensation for the rotating antenna. SMAP Handbook 2014-07-01 publication JPL CL#14-2285, JPL 400-1567 SMAP SAR L-Band Synthetic Aperture Radar The SMAP 1.225 GHz L-Band Radar Instrument SMAP Handbook 2014-07-01 publication JPL CL#14-2285, JPL 400-1567 SMAP RAD L-Band Radiometer The SMAP 1.414 GHz L-Band Radiometer processingInformation uuid for stopRevNumber http://smap.jpl.nasa.gov stopRevNumber int 2301 processingInformation uuid for startRevNumber http://smap.jpl.nasa.gov startRevNumber int 2288 processingInformation uuid for AntennaRotationRate http://smap.jpl.nasa.gov AntennaRotationRate float 14.6 "; String iso_19139_series_xml " L3_FT_A eng utf8 series NSIDC DAAC > National Snow and Ice Data Center DAAC nsidc@nsidc.org http://nsidc.org/daac/ pointOfContact 2014-04-15 ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data ISO 19115-2:2009-02-15 SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State 2016-03-31 revision R13 SPL3FTA smap.jpl.nasa.gov The ECS Short Name 003 gov.nasa.esdis The ECS Version ID doi:10.5067/CPSA0M496MGB gov.nasa.esdis A Digital Object Identifier (DOI) National Aeronautics and Space Administration (NASA) resourceProvider Jet Propulsion Laboratory originator documentDigital The Calibration and Validation Version 2 Release of the Level 3 Daily Global Composite Freeze/Thaw State Science Processing Software. Daily global composite of up-to 30 half-orbit L2_FT_A binary freeze/thaw state based on radar backscatter measurements by the SMAP radar during descending and ascending half-orbits at approximately 6 AM or 6 PM local solar time, respectively. The SMAP L3_FT_A algorithm provides daily global composite of freeze/thaw state based on synthetic-aperture radar data on a 3 km grid. The software that generates the Level 3 Freeze/Thaw product and the data system that automates its production were designed and implemented at the Jet Propulsion Laboratory, California Institute of Technology in Pasadena, California. onGoing National Snow and Ice Data Center distributor asNeeded 2017-04-01 series HDF5 1.8.13 EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > FREEZE/THAW EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > FREEZE/THAW EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT EARTH SCIENCE > SPECTRAL/ENGINEERING > RADAR > RADAR BACKSCATTER theme NASA/GCMD Earth Science Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Imaging Radars > > SMAP L-BAND RADAR > SMAP L-Band Radar theme NASA/GCMD Earth Science Keywords Earth Observation Satellites > NASA Decadal Survey > SMAP > Soil Moisture Active and Passive Observatory theme NASA/GCMD Earth Science Keywords GEOGRAPHIC REGION > NORTHERN HEMISPHERE theme NASA/GCMD Earth Science Keywords SMAP largerWorkCitation mission grid 3 eng utf8 geoscientificInformation Data product generated by the SMAP mission in HDF5 format with metadata that conforms to the ISO 19115 model. Freeze-thaw binary state is retrieved from high-resolution radar data on both descending (AM, fore/aft) and ascending (PM, fore-only) SMAP half-orbits. The L3_FT_A product includes only data northward of 45N latitude. Freeze-thaw state retrieval is inhibited for areas with permanent snow/ice and excessive static or transient open water in the cell, and when there is excessive RFI in the sensor data. Retrievals may be flagged as questionable for urban areas, mountainous areas with high elevation variability, and for cells in which the seasonal (thawed-frozen) reference difference is much smaller than the radar measurement error. 1 -180.00 180.00 45.00 85.0445 2015-04-13T00:00:00.000Z 2020-12-31T00:00:00.000Z Product Specification Document for the SMAP Level 3 Freeze/Thaw Product (L3_FT_A) 2015-10-15 publication 1.0 L3_FT_A smap.jpl.nasa.gov Short name used by the Soil Moisture Active Passive (SMAP) mission to identify the Level 3 Freeze/Thaw product. documentDigital The Product Specification Document that fully describes the content and format of this data product. eng utf8 "; String fullnamepath "/Metadata"; } Metadata_AcquisitionInformation { } Metadata_AcquisitionInformation_platform { String description "The SMAP observatory houses an L-band radiometer that operates at 1.414 GHz and an L-band radar that operates at 1.225 GHz. The instruments share a rotating reflector antenna with a 6 meter aperture that scans over a 1000 km swath. The bus is a 3 axis stabilized spacecraft that provides momentum compensation for the rotating antenna."; Float32 antennaRotationRate 14.60000038; String identifier "SMAP"; String fullnamepath "/Metadata/AcquisitionInformation/platform"; } Metadata_AcquisitionInformation_radarDocument { String edition "JPL CL#14-2285, JPL 400-1567"; String title "SMAP Handbook"; String publicationDate "2014-07-01"; String fullnamepath "/Metadata/AcquisitionInformation/radarDocument"; } Metadata_AcquisitionInformation_radiometerDocument { String edition "JPL CL#14-2285, JPL 400-1567"; String title "SMAP Handbook"; String publicationDate "2014-07-01"; String fullnamepath "/Metadata/AcquisitionInformation/radiometerDocument"; } Metadata_AcquisitionInformation_radiometer { String description "The SMAP 1.414 GHz L-Band Radiometer"; String type "L-Band Radiometer"; String identifier "SMAP RAD"; String fullnamepath "/Metadata/AcquisitionInformation/radiometer"; } Metadata_AcquisitionInformation_radar { String description "The SMAP 1.225 GHz L-Band Radar Instrument"; String type "L-Band Synthetic Aperture Radar"; String identifier "SMAP SAR"; String fullnamepath "/Metadata/AcquisitionInformation/radar"; } Metadata_AcquisitionInformation_platformDocument { String edition "JPL CL#14-2285, JPL 400-1567"; String title "SMAP Handbook"; String publicationDate "2014-07-01"; String fullnamepath "/Metadata/AcquisitionInformation/platformDocument"; } Metadata_DataQuality { String scope "freeze_thaw"; String fullnamepath "/Metadata/DataQuality"; } Metadata_DataQuality_DomainConsistency { String nameOfMeasure "Percent of freeze-thaw that are within the Acceptable Range."; String measureDescription "Percent of freeze-thaw measures in the data product that fall within a predefined acceptable range of measure."; String evaluationMethodType "directInternal"; String unitOfMeasure "percent"; Float32 value 100.0000000; String fullnamepath "/Metadata/DataQuality/DomainConsistency"; } Metadata_DataQuality_CompletenessOmission { String measureDescription "Percent of grid cells that lack radar data relative to the total number of grid cells that fall within the mission acquisition mask."; String nameOfMeasure "Percent of Missing Data"; String unitOfMeasure "percent"; Float32 value 52.06815720; String evaluationMethodType "directInternal"; String fullnamepath "/Metadata/DataQuality/CompletenessOmission"; } Metadata_ProductSpecificationDocument { String language "eng"; String characterSet "utf8"; String edition "1.0"; String title "Product Specification Document for the SMAP Level 3 Freeze/Thaw Product (L3_FT_A)"; String publicationDate "2015-10-15"; String SMAPShortName "L3_FT_A"; String fullnamepath "/Metadata/ProductSpecificationDocument"; } Metadata_SeriesIdentification { String identifier_product_DOI "doi:10.5067/CPSA0M496MGB"; String shortName "SPL3FTA"; String mission "SMAP"; String characterSet "utf8"; String resourceProviderOrganizationName "National Aeronautics and Space Administration (NASA)"; String language "eng"; String ECSVersionID "003"; String abstract "Daily global composite of up-to 30 half-orbit L2_FT_A binary freeze/thaw state based on radar backscatter measurements by the SMAP radar during descending and ascending half-orbits at approximately 6 AM or 6 PM local solar time, respectively."; String status "onGoing"; String revisionDate "2016-03-31"; String credit "The software that generates the Level 3 Freeze/Thaw product and the data system that automates its production were designed and implemented at the Jet Propulsion Laboratory, California Institute of Technology in Pasadena, California."; String topicCategory "geoscientificInformation"; String purpose "The SMAP L3_FT_A algorithm provides daily global composite of freeze/thaw state based on synthetic-aperture radar data on a 3 km grid."; String longName "SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State"; String pointOfContact "National Snow and Ice Data Center"; String CompositeReleaseID "R13"; String spatialRepresentationType "grid"; String otherCitationDetails "The Calibration and Validation Version 2 Release of the Level 3 Daily Global Composite Freeze/Thaw State Science Processing Software."; String fullnamepath "/Metadata/SeriesIdentification"; } Metadata_DatasetIdentification { String shortName "SPL3FTA"; String characterSet "utf8"; String UUID "20b5b028-1dae-4e66-a6d2-56d548f8b288"; String language "eng"; String formatVersion "1.8.13"; String ECSVersionID "003"; String abstract "Daily global composite of up-to 30 half-orbit L2_FT_A binary freeze/thaw state based on radar backscatter measurements by the SMAP radar during descending and ascending half-orbits at approximately 6 AM or 6 PM local solar time, respectively."; String creationDate "2016-06-03"; String status "onGoing"; String credit "The software that generates the Level 3 FT_A product and the data system that automates its production were designed and implemented at the Jet Propulsion Laboratory, California Institute of Technology in Pasadena, California."; String topicCategory "geoscientificInformation"; String purpose "The L3_FT_A product provides daily estimates of binary freeze-thaw state, retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm. Data from both AM (descending) and PM (ascending) high-resolution radar coverage are gridded at 3km resolution on a boreal polar grid at 3 km resolution. AM/PM transition flags indicate changes in freeze-thaw state between morning and evening observations."; String format "HDF5"; String fileName "SMAP_L3_FT_A_20150707_R13080_001.h5"; String maintenanceAndUpdateFrequency "asNeeded"; String CompositeReleaseID "R13080"; String originatorOrganizationName "Jet Propulsion Laboratory"; String maintenanceDate "2016-05-01"; String SMAPShortName "L3_FT_A"; String spatialRepresentationType "grid"; String otherCitationDetails "The Calibration and Validation Version 2 Release of the Level 3 Daily Global Composite Freeze/Thaw State Science Processing Software."; String fullnamepath "/Metadata/DatasetIdentification"; } Metadata_Extent { String description "Freeze-thaw binary state is retrieved from high-resolution radar data on both descending (AM, fore/aft) and ascending (PM, fore-only) SMAP half-orbits. The L3_FT_A product includes only data northward of 45N latitude. Freeze-thaw state retrieval is inhibited for areas with permanent snow/ice and excessive static or transient open water in the cell, and when there is excessive RFI in the sensor data. Retrievals may be flagged as questionable for urban areas, mountainous areas with high elevation variability, and for cells in which the seasonal (thawed-frozen) reference difference is much smaller than the radar measurement error."; Float32 eastBoundLongitude 180.0000000; Float32 westBoundLongitude -180.0000000; Float32 southBoundLatitude 45.00000000; Float32 northBoundLatitude 85.04450226; String rangeBeginningDateTime "2015-07-07T00:00:00.000Z"; String rangeEndingDateTime "2015-07-07T23:59:59.999Z"; String fullnamepath "/Metadata/Extent"; } Metadata_QADatasetIdentification { String fileName "SMAP_L3_FT_A_20150707_R13080_001.qa"; String abstract "An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule."; String creationDate "2016-06-03"; String fullnamepath "/Metadata/QADatasetIdentification"; } Metadata_GridSpatialRepresentation { String orientationParameterAvailability "0"; String transformationParameterAvailability "0"; String controlPointAvailability "0"; String georeferencedParameters "SMAP Fixed Earth Grids, SMAP Science Document no: 033, May 11, 2009"; String cellGeometry "area"; String fullnamepath "/Metadata/GridSpatialRepresentation"; } Metadata_GridSpatialRepresentation_Row { UInt32 dimensionSize 6000; Float32 resolution 3.000000000; String fullnamepath "/Metadata/GridSpatialRepresentation/Row"; } Metadata_GridSpatialRepresentation_GridDefinitionDocument { String edition "EASE-Grid 2.0"; String title "EASE-Grid 2.0: Incremental but Significant Improvements for Earth-Gridded Data Sets (ISPRS Int. J. Geo-Inf. 2012, 1, 32-45; doi:10.3390/ijgi1010032)"; String publicationDate "2012-03-31"; String fullnamepath "/Metadata/GridSpatialRepresentation/GridDefinitionDocument"; } Metadata_GridSpatialRepresentation_Column { UInt32 dimensionSize 6000; Float32 resolution 3.000000000; String fullnamepath "/Metadata/GridSpatialRepresentation/Column"; } Metadata_GridSpatialRepresentation_GridDefinition { String description "The Equal-Area Scalable Earth Grid (EASE-Grid 2.0) is used for gridding satellite data sets. The EASE-Grid 2.0 is defined on the WGS84 ellipsoid to allow users to import data into standard GIS software formats such as GeoTIFF without reprojection."; String identifier "Equal-Area Scalable Earth Grid"; String fullnamepath "/Metadata/GridSpatialRepresentation/GridDefinition"; } Metadata_OrbitMeasuredLocation { Int32 stopRevNumber 2301; Int32 startRevNumber 2288; String fullnamepath "/Metadata/OrbitMeasuredLocation"; } Metadata_Lineage { } Metadata_Lineage_OutputConfiguration { String description "A configuration file that lists the entire content of the output Radar Level 3_FT_A_ product."; String version "R13080"; String fileName "SMAP_L3_FT_A_SPS_OutputConfig_L3_FT_A.xml"; String creationDate "2016-06-03"; String fullnamepath "/Metadata/Lineage/OutputConfiguration"; } Metadata_Lineage_MetadataConfiguration { String description "A configuration file that specifies the source of the values for each of the data elements that comprise the metadata in the output Radar Level 3_FT_A product."; String version "R13080"; String fileName "SMAP_L3_FT_A_SPS_MetConfig_L2_FT_A.xml"; String creationDate "2016-06-03"; String fullnamepath "/Metadata/Lineage/MetadataConfiguration"; } Metadata_Lineage_EASEGRID_LON_N { String description "Precomputed longitude at each EASEGrid cell at 3km resolution on north Polar Azimuthal Projection"; String version "002"; String fileName "EZ2Lon_N03_002.float32"; String creationDate "2013-05-09"; String fullnamepath "/Metadata/Lineage/EASEGRID_LON_N"; } Metadata_Lineage_RunConfiguration { String description "A configuration file generated automatically within the SMAP data system that specifies all of the conditions required for each individual run of the Radar Level 3 FT_A Science Processing Software (SPS)."; String version "R13080"; String fileName "SMAP_L3_FT_A_SPS_RunConfig_20160603T190825038.xml"; String creationDate "2016-06-03"; String fullnamepath "/Metadata/Lineage/RunConfiguration"; } Metadata_Lineage_L2_FT_A { String description "The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time."; String fileName "SMAP_L3_FT_A_20150706_R13080_001.h5", "SMAP_L2_FT_A_02288_A_20150706T234026_R13080_001.h5", "SMAP_L2_FT_A_02288_D_20150707T002936_R13080_001.h5", "SMAP_L2_FT_A_02289_A_20150707T011851_R13080_001.h5", "SMAP_L2_FT_A_02289_D_20150707T020806_R13080_001.h5", "SMAP_L2_FT_A_02290_A_20150707T025721_R13080_001.h5", "SMAP_L2_FT_A_02290_D_20150707T034632_R13080_001.h5", "SMAP_L2_FT_A_02291_A_20150707T043546_R13080_001.h5", "SMAP_L2_FT_A_02291_D_20150707T052501_R13080_001.h5", "SMAP_L2_FT_A_02292_A_20150707T061416_R13080_001.h5", "SMAP_L2_FT_A_02292_D_20150707T070327_R13080_001.h5", "SMAP_L2_FT_A_02293_A_20150707T075242_R13080_001.h5", "SMAP_L2_FT_A_02293_D_20150707T084156_R13080_001.h5", "SMAP_L2_FT_A_02294_A_20150707T093111_R13080_001.h5", "SMAP_L2_FT_A_02294_D_20150707T102022_R13080_001.h5", "SMAP_L2_FT_A_02295_A_20150707T110937_R13080_001.h5", "SMAP_L2_FT_A_02295_D_20150707T115852_R13080_001.h5", "SMAP_L2_FT_A_02296_A_20150707T124807_R13080_001.h5", "SMAP_L2_FT_A_02296_D_20150707T133717_R13080_001.h5", "SMAP_L2_FT_A_02297_A_20150707T142632_R13080_001.h5", "SMAP_L2_FT_A_02297_D_20150707T151547_R13080_001.h5", "SMAP_L2_FT_A_02298_A_20150707T160502_R13080_001.h5", "SMAP_L2_FT_A_02298_D_20150707T165412_R13080_001.h5", "SMAP_L2_FT_A_02299_A_20150707T174327_R13080_001.h5", "SMAP_L2_FT_A_02299_D_20150707T183242_R13080_001.h5", "SMAP_L2_FT_A_02300_A_20150707T192157_R13080_001.h5", "SMAP_L2_FT_A_02300_D_20150707T201108_R13080_001.h5", "SMAP_L2_FT_A_02301_A_20150707T210023_R13080_001.h5", "SMAP_L2_FT_A_02301_D_20150707T214937_R13080_001.h5"; String DOI "N/A"; String identifier "L2_FT_A"; String creationDate "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03", "2016-06-03"; Float32 resolution 3.000000000; String fullnamepath "/Metadata/Lineage/L2_FT_A"; } Metadata_Lineage_EASEGRID_LAT_N { String description "Precomputed latitude at each EASEGrid cell at 3km resolution on north Polar Azimuthal Projection"; String version "002"; String fileName "EZ2Lat_N03_002.float32"; String creationDate "2013-05-09"; String fullnamepath "/Metadata/Lineage/EASEGRID_LAT_N"; } Metadata_Lineage_L3_FT_A { String description "The SMAP L2_FT_A product provides binary freeze-thaw state estimates based on radar backscatter measurements acquired by the SMAP radar, at approximately 6:00 AM local time."; String DOI "N/A"; String identifier "L3_FT_A"; Float32 resolution 3.000000000; String fullnamepath "/Metadata/Lineage/L3_FT_A"; } Metadata_Lineage_InputConfiguration { String description "A configuration file that specifies the complete set of elements within the input Level 2 FT Product that the Radar Level 3_FT_A Science Processing Software (SPS) needs in order to function."; String version "R13080"; String fileName "SMAP_L3_FT_A_SPS_InputConfig_L3_FT_A.xml"; String creationDate "2016-06-03"; String fullnamepath "/Metadata/Lineage/InputConfiguration"; } Metadata_ProcessStep { String processDescription "Freeze-thaw state retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm."; String stepDateTime "2016-06-03T19:08:25.038Z"; String documentation "Algorithm Theoetical Basis Document (ATBD) SMAP Level3 Radar Freeze/Thaw Data Product (L3_FT_A)"; String epochUTCDateTime "2000-01-01T11:58:55.816Z"; String algorithmVersionID "020"; String softwareTitle "L3_FT_A_SPS"; String algorithmDate "2016-03-30"; String parameterVersionID "018"; String identifier "L3_FT_A_SPS"; String ATBDVersion "Revision B"; String softwareDate "2014-04-15"; String ATBDDate "2015-10-13"; String SWVersionID "019"; String algorithmDescription "Freeze-thaw state retrieved from backscatter measurements acquired by the SMAP radar, using a seasonal change-detection algorithm. A given measurement is compared to seasonal reference states for frozen and thawed conditions; measurements falling below the threshold are considered to represent frozen states, and measurements exceeding the threshold are considered to represent thawed states."; String ATBDTitle "Algorithm Theoetical Basis Document (ATBD) SMAP Level3 Radar Freeze/Thaw Data Product (L3_FT_A)"; Float32 epochJulianDate 2451545.000; String timeVariableEpoch "J2000"; String documentDate "2015-10-13"; String processor "Soil Moisture Active Passive Mission (SMAP) Science Data System (SDS) Operations Facility"; String algorithmTitle "Soil Moisture Active Passive (SMAP) Freeze-Thaw processing algorithm"; String documentVersion "Version 1.0"; String fullnamepath "/Metadata/ProcessStep"; } Ancillary_Data { } Freeze_Thaw_Retrieval_Data { } Radar_Data { } Ancillary_Data_landcover_class { String long_name "An enumerated type that specifies the predominant surface vegetation found in the grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Byte _FillValue 254; String origname "landcover_class"; String fullnamepath "/Ancillary_Data/landcover_class"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Ancillary_Data_open_water_body_fraction { Float32 valid_min 0.000000000; String long_name "Fraction of the area of the grid cell surface covered by open water. Open water areas do not have vegetation at or on the water surface. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 1.000000000; Float32 _FillValue -9999.000000; String origname "open_water_body_fraction"; String fullnamepath "/Ancillary_Data/open_water_body_fraction"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Ancillary_Data_altitude_std_dev { String units "meters"; String long_name "The standard deviation of the Earth surface elevation within the 3km cell. This element provides a surface roughness measure. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min 0.000000000; Float32 valid_max 1000.000000; Float32 _FillValue -9999.000000; String origname "altitude_std_dev"; String fullnamepath "/Ancillary_Data/altitude_std_dev"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Ancillary_Data_altitude_dem { String units "meters"; String long_name "The Earth surface elevation within the 3km cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min -1000.000000; Float32 valid_max 10000.00000; Float32 _FillValue -9999.000000; String origname "altitude_dem"; String fullnamepath "/Ancillary_Data/altitude_dem"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_thaw_reference { String units "dB"; String long_name "Reference sigma0 value used as a basis to indicate thawed conditions. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min -50.00000000; Float32 valid_max 10.00000000; Float32 _FillValue -9999.000000; String origname "thaw_reference"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/thaw_reference"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_reference_date { String long_name "Date of the data used to determine the reference freeze condition. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String origname "freeze_reference_date"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_reference_date"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_EASE_row_index { UInt16 valid_min 0; UInt16 valid_max 65535; String long_name "The row index of the 3 km EASE grid cell that contains the associated data. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; UInt16 _FillValue 65534; String origname "EASE_row_index"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/EASE_row_index"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_thaw_time_utc { String long_name "Time of the freeze-thaw determination for this particular element in UTC. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String origname "freeze_thaw_time_utc"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_thaw_time_utc"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_longitude { String units "degrees_east"; String long_name "Longitude of the center of the Earth based grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String origname "longitude"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/longitude"; } Freeze_Thaw_Retrieval_Data_transition_state_flag { Byte valid_min 0; Byte valid_max 1; String long_name "Boolean that indicates whether soil is in transitional state from AM to PM on the same day. 0 indicates state is not in transition, 1 indicates state is in transition."; Byte _FillValue 254; String origname "transition_state_flag"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/transition_state_flag"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_latitude { String units "degrees_north"; String long_name "Latitude of the center of the Earth based grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String origname "latitude"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/latitude"; } Freeze_Thaw_Retrieval_Data_retrieval_qual_flag { UInt16 _FillValue 65534; String long_name "Sequence of bit flags that indicate the conditions and the quality of the freeze-thaw retrieval. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String flag_masks "1s, 2s, 4s, 8s, 16s, 32s"; String flag_meanings "Retrieval_recommended_flag Retrieval_attempted_flag Retrieval_success_flag Radar_water_body_detection_success_flag Freeze-thaw_retrieval_success_flag Radar_vegetation_index_retrieval_success_flag"; String origname "retrieval_qual_flag"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/retrieval_qual_flag"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_thaw_uncertainty { Float32 valid_min -999999.8750; String long_name "Uncertainty measure for the recorded freeze-thaw result. Method to determine uncertainty is TBD. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 999999.8750; Float32 _FillValue -9999.000000; String origname "freeze_thaw_uncertainty"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_thaw_uncertainty"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_transition_direction { String long_name "Boolean that indicates transitional direction. 0 indicates AM frozen, PM thawed, 1 indicates AM thawed, PM frozen. Value is always zero if not in transition state."; Byte valid_min 0; Byte valid_max 1; Byte _FillValue 254; String origname "transition_direction"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/transition_direction"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_thaw { Byte valid_min 0; Byte valid_max 1; String long_name "Boolean that indicates whether soil within cell is frozen or thawed. A value of zero value implies thawed conditions, a value of 1 implies frozen. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Byte _FillValue 254; String origname "freeze_thaw"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_thaw"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_data_sampling_density { String units "km"; String long_name "Average distance between data samples in a window that surrounds the grid cell. Window size is TBD. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min 0.000000000; Float32 valid_max 2.000000000; Float32 _FillValue -9999.000000; String origname "data_sampling_density"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/data_sampling_density"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_thaw_reference_date { String long_name "Date of the data used to determine the reference thawed conditon. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String origname "thaw_reference_date"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/thaw_reference_date"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_EASE_column_index { UInt16 valid_min 0; UInt16 valid_max 65535; String long_name "The column index of the 3 km EASE grid cell that contains the associated data. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; UInt16 _FillValue 65534; String origname "EASE_column_index"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/EASE_column_index"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_thaw_time_seconds { String units "seconds"; String long_name "Time of the freeze-thaw determination for this particular element in seconds from the standard epoch. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float64 valid_min -999999.90000000002; Float64 valid_max 999999.90000000002; Float64 _FillValue -9999.0000000000000; String origname "freeze_thaw_time_seconds"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_thaw_time_seconds"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_surface_flag { String long_name "Bit flags that record ambient surface conditions for the grid cell"; UInt16 _FillValue 65534; String flag_masks "1s, 2s, 4s, 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s, 2048s"; String flag_meanings "3_km_static_water_body_flag 3_km_radar_water_body_detection_flag 3_km_coastal_proximity_flag 3_km_urban_area_flag 3_km_precipitation_flag 3_km_snow_or_ice_flag 3_km_permanent_snow_or_ice_flag 3_km_radar_frozen_ground_flag 3_km_model_frozen_ground_flag 3_km_mountainous_terrain_flag 3_km_dense_vegetation_flag 3_km_nadir_region_flag"; String origname "surface_flag"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/surface_flag"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_freeze_reference { String units "dB"; String long_name "Reference sigma0 value used as a basis to indicate frozen conditions. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min -50.00000000; Float32 valid_max 10.00000000; Float32 _FillValue -9999.000000; String origname "freeze_reference"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/freeze_reference"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Freeze_Thaw_Retrieval_Data_reference_image_threshold { String units "dB"; String long_name "Threshold based on reference freeze and thaw to differentiate between freeze and thaw conditions. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_min -1.000000000; Float32 valid_max 1.000000000; Float32 _FillValue -9999.000000; String origname "reference_image_threshold"; String fullnamepath "/Freeze_Thaw_Retrieval_Data/reference_image_threshold"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_kp_vv { Float32 valid_min -0.009999999776; String long_name "Overall error measure for VV-pol Sigma0 within the grid cell, includes calibration, RFI and contamination effects. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 1.000000000; Float32 _FillValue -9999.000000; String origname "kp_vv"; String fullnamepath "/Radar_Data/kp_vv"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_qual_flag_hh { UInt32 _FillValue 4294967294; String long_name "Representative quality flags of horizontal polarization sigma0 measures in the grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String flag_masks "1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072"; String flag_meanings "Mean_horizontal_polarization_quality_flag Forward_looking_horizontal_polarization_quality_flag Aft_looking_horizontal_polarization_quality_flag Mean_horizontal_polarization_range_flag Forward_looking_horizontal_polarization_range_flag Aft_looking_horizontal_polarization_range_flag Mean_horizontal_polarization_RFI_clean_flag Mean_horizontal_polarization_RFI_repair_flag Forward_looking_horizontal_polarization_RFI_clean_flag Forward_looking_horizontal_polarization_RFI_repair_flag Aft_looking_horizontal_polarization_RFI_clean_flag Aft_looking_horizontal_polarization_RFI_repair_flag Mean_horizontal_polarization_Faraday_Rotation_Flag Forward_looking_horizontal_polarization_Faraday_Rotation_Flag Aft_looking_horizontal_polarization_Faraday_Rotation_Flag Mean_horizontal_polarization_Kp_flag Forward_looking_horizontal_polarization_Kp_flag Aft_looking_horizontal_polarization_Kp_flag"; String origname "sigma0_qual_flag_hh"; String fullnamepath "/Radar_Data/sigma0_qual_flag_hh"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_hh_mean { Float32 valid_min -0.009999999776; String long_name "Mean of 1 km instrument resolution HH-pol backscatter in the 3 km Earth grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 10.00000000; Float32 _FillValue -9999.000000; String origname "sigma0_hh_mean"; String fullnamepath "/Radar_Data/sigma0_hh_mean"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_qual_flag_vv { UInt32 _FillValue 4294967294; String long_name "Representative quality flags of vertical polarization sigma0 measures in the grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String flag_masks "1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072"; String flag_meanings "Mean_vertical_polarization_quality_flag Forward_looking_vertical_polarization_quality_flag Aft_looking_vertical_polarization_quality_flag Mean_vertical_polarization_range_flag Forward_looking_vertical_polarization_range_flag Aft_looking_vertical_polarization_range_flag Mean_vertical_polarization_RFI_clean_flag Mean_vertical_polarization_RFI_repair_flag Forward_looking_vertical_polarization_RFI_clean_flag Forward_looking_vertical_polarization_RFI_repair_flag Aft_looking_vertical_polarization_RFI_clean_flag Aft_looking_vertical_polarization_RFI_repair_flag Mean_vertical_polarization_Faraday_Rotation_Flag Forward_looking_vertical_polarization_Faraday_Rotation_Flag Aft_looking_vertical_polarization_Faraday_Rotation_Flag Mean_vertical_polarization_Kp_flag Forward_looking_vertical_polarization_Kp_flag Aft_looking_vertical_polarization_Kp_flag"; String origname "sigma0_qual_flag_vv"; String fullnamepath "/Radar_Data/sigma0_qual_flag_vv"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_qual_flag_xpol { UInt32 _FillValue 4294967294; String long_name "Representative quality flags of cross polarized sigma0 measures in the grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; String flag_masks "1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072"; String flag_meanings "Mean_cross_polarized_quality_flag Forward_looking_cross_polarized_quality_flag Aft_looking_cross_polarized_quality_flag Mean_cross_polarized_range_flag Forward_looking_cross_polarized_range_flag Aft_looking_cross_polarized_range_flag Mean_cross_polarized_RFI_clean_flag Mean_cross_polarized_RFI_repair_flag Forward_looking_cross_polarized_RFI_clean_flag Forward_looking_cross_polarized_RFI_repair_flag Aft_looking_cross_polarized_RFI_clean_flag Aft_looking_cross_polarized_RFI_repair_flag Mean_cross_polarized_Faraday_Rotation_Flag Forward_looking_cross_polarized_Faraday_Rotation_Flag Aft_looking_cross_polarized_Faraday_Rotation_Flag Mean_cross_polarized_Kp_flag Forward_looking_cross_polarized_Kp_flag Aft_looking_cross_polarized_Kp_flag"; String origname "sigma0_qual_flag_xpol"; String fullnamepath "/Radar_Data/sigma0_qual_flag_xpol"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_kp_xpol { Float32 valid_min -0.009999999776; String long_name "Overall error measure for cross-pol Sigma0 within the grid cell, includes calibration, RFI and contamination effects. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 1.000000000; Float32 _FillValue -9999.000000; String origname "kp_xpol"; String fullnamepath "/Radar_Data/kp_xpol"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_vv_mean { Float32 valid_min -0.009999999776; String long_name "Mean of 1 km instrument resolution VV-pol backscatter in the 3 km Earth grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 10.00000000; Float32 _FillValue -9999.000000; String origname "sigma0_vv_mean"; String fullnamepath "/Radar_Data/sigma0_vv_mean"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_sigma0_xpol_mean { Float32 valid_min -0.009999999776; String long_name "Mean of 1 km instrument resolution cross-polarization backscatter in the 3 km Earth grid cell. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 10.00000000; Float32 _FillValue -9999.000000; String origname "sigma0_xpol_mean"; String fullnamepath "/Radar_Data/sigma0_xpol_mean"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } Radar_Data_kp_hh { Float32 valid_min -0.009999999776; String long_name "Overall error measure for HH-pol Sigma0 within the grid cell, includes calibration, RFI and contamination effects. The AM (dimension AMPM=0) and PM (AMPM=1) observations are stored separately in the array."; Float32 valid_max 1.000000000; Float32 _FillValue -9999.000000; String origname "kp_hh"; String fullnamepath "/Radar_Data/kp_hh"; String coordinates "Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude"; } }