| Ancillary_Data_landcover_class: | Array of Bytes [ = 0..1][ = 0..5999][ = 0..5999] 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. _FillValue: 254 origname: landcover_class fullnamepath: /Ancillary_Data/landcover_class coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Ancillary_Data_open_water_body_fraction: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: 0.000000000 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. valid_max: 1.000000000 _FillValue: -9999.000000 origname: open_water_body_fraction fullnamepath: /Ancillary_Data/open_water_body_fraction coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Ancillary_Data_altitude_std_dev: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: meters 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. valid_min: 0.000000000 valid_max: 1000.000000 _FillValue: -9999.000000 origname: altitude_std_dev fullnamepath: /Ancillary_Data/altitude_std_dev coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Ancillary_Data_altitude_dem: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: meters 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. valid_min: -1000.000000 valid_max: 10000.00000 _FillValue: -9999.000000 origname: altitude_dem fullnamepath: /Ancillary_Data/altitude_dem coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_thaw_reference: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: dB 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. valid_min: -50.00000000 valid_max: 10.00000000 _FillValue: -9999.000000 origname: thaw_reference fullnamepath: /Freeze_Thaw_Retrieval_Data/thaw_reference coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_reference_date: | Array of Strings [ = 0..1][ = 0..5999][ = 0..5999] 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. origname: freeze_reference_date fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_reference_date coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_EASE_row_index: | Array of 16 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] valid_min: 0 valid_max: 65535 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. _FillValue: 65534 origname: EASE_row_index fullnamepath: /Freeze_Thaw_Retrieval_Data/EASE_row_index coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_thaw_time_utc: | Array of Strings [ = 0..1][ = 0..5999][ = 0..5999] 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. origname: freeze_thaw_time_utc fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_thaw_time_utc coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_longitude: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: degrees_east 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. origname: longitude fullnamepath: /Freeze_Thaw_Retrieval_Data/longitude |
| Freeze_Thaw_Retrieval_Data_transition_state_flag: | Array of Bytes [ = 0..5999][ = 0..5999] valid_min: 0 valid_max: 1 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. _FillValue: 254 origname: transition_state_flag fullnamepath: /Freeze_Thaw_Retrieval_Data/transition_state_flag coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_latitude: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: degrees_north 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. origname: latitude fullnamepath: /Freeze_Thaw_Retrieval_Data/latitude |
| Freeze_Thaw_Retrieval_Data_retrieval_qual_flag: | Array of 16 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] _FillValue: 65534 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. flag_masks: 1s, 2s, 4s, 8s, 16s, 32s 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 origname: retrieval_qual_flag fullnamepath: /Freeze_Thaw_Retrieval_Data/retrieval_qual_flag coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_thaw_uncertainty: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -999999.8750 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. valid_max: 999999.8750 _FillValue: -9999.000000 origname: freeze_thaw_uncertainty fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_thaw_uncertainty coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_transition_direction: | Array of Bytes [ = 0..5999][ = 0..5999] 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. valid_min: 0 valid_max: 1 _FillValue: 254 origname: transition_direction fullnamepath: /Freeze_Thaw_Retrieval_Data/transition_direction coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_thaw: | Array of Bytes [ = 0..1][ = 0..5999][ = 0..5999] valid_min: 0 valid_max: 1 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. _FillValue: 254 origname: freeze_thaw fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_thaw coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_data_sampling_density: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: km 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. valid_min: 0.000000000 valid_max: 2.000000000 _FillValue: -9999.000000 origname: data_sampling_density fullnamepath: /Freeze_Thaw_Retrieval_Data/data_sampling_density coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_thaw_reference_date: | Array of Strings [ = 0..1][ = 0..5999][ = 0..5999] 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. origname: thaw_reference_date fullnamepath: /Freeze_Thaw_Retrieval_Data/thaw_reference_date coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_EASE_column_index: | Array of 16 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] valid_min: 0 valid_max: 65535 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. _FillValue: 65534 origname: EASE_column_index fullnamepath: /Freeze_Thaw_Retrieval_Data/EASE_column_index coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_thaw_time_seconds: | Array of 64 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: seconds 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. valid_min: -999999.90000000002 valid_max: 999999.90000000002 _FillValue: -9999.0000000000000 origname: freeze_thaw_time_seconds fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_thaw_time_seconds coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_surface_flag: | Array of 16 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] long_name: Bit flags that record ambient surface conditions for the grid cell _FillValue: 65534 flag_masks: 1s, 2s, 4s, 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s, 2048s 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 origname: surface_flag fullnamepath: /Freeze_Thaw_Retrieval_Data/surface_flag coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_freeze_reference: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: dB 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. valid_min: -50.00000000 valid_max: 10.00000000 _FillValue: -9999.000000 origname: freeze_reference fullnamepath: /Freeze_Thaw_Retrieval_Data/freeze_reference coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Freeze_Thaw_Retrieval_Data_reference_image_threshold: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] units: dB 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. valid_min: -1.000000000 valid_max: 1.000000000 _FillValue: -9999.000000 origname: reference_image_threshold fullnamepath: /Freeze_Thaw_Retrieval_Data/reference_image_threshold coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_kp_vv: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 1.000000000 _FillValue: -9999.000000 origname: kp_vv fullnamepath: /Radar_Data/kp_vv coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_qual_flag_hh: | Array of 32 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] _FillValue: 4294967294 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. flag_masks: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072 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 origname: sigma0_qual_flag_hh fullnamepath: /Radar_Data/sigma0_qual_flag_hh coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_hh_mean: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 10.00000000 _FillValue: -9999.000000 origname: sigma0_hh_mean fullnamepath: /Radar_Data/sigma0_hh_mean coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_qual_flag_vv: | Array of 32 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] _FillValue: 4294967294 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. flag_masks: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072 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 origname: sigma0_qual_flag_vv fullnamepath: /Radar_Data/sigma0_qual_flag_vv coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_qual_flag_xpol: | Array of 32 bit Unsigned integers [ = 0..1][ = 0..5999][ = 0..5999] _FillValue: 4294967294 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. flag_masks: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072 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 origname: sigma0_qual_flag_xpol fullnamepath: /Radar_Data/sigma0_qual_flag_xpol coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_kp_xpol: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 1.000000000 _FillValue: -9999.000000 origname: kp_xpol fullnamepath: /Radar_Data/kp_xpol coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_vv_mean: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 10.00000000 _FillValue: -9999.000000 origname: sigma0_vv_mean fullnamepath: /Radar_Data/sigma0_vv_mean coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_sigma0_xpol_mean: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 10.00000000 _FillValue: -9999.000000 origname: sigma0_xpol_mean fullnamepath: /Radar_Data/sigma0_xpol_mean coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |
| Radar_Data_kp_hh: | Array of 32 bit Reals [ = 0..1][ = 0..5999][ = 0..5999] valid_min: -0.009999999776 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. valid_max: 1.000000000 _FillValue: -9999.000000 origname: kp_hh fullnamepath: /Radar_Data/kp_hh coordinates: Freeze_Thaw_Retrieval_Data_latitude Freeze_Thaw_Retrieval_Data_longitude |