4. SMAP хиймэл дагуулын тухай
2015 оны 1 сарын 31нд сансарт NASA (National
Aeronautics and Space Administration) хөөргөсөн.
SMAP-ын ШУны үндсэн зорилго нь:
Орон зайн өндөр нарийвчлалтай
хөрсний чийгийн болон хөлдөлт
гэсэлтийн зураглалыг хийх
(Motivation: Low-frequency passive microwaves are
sensitive to the terrestrial water cycle (soil moisture,
snow))
1.link terrestrial water, energy, and carbon cycle
processes
2.estimate global water and energy fluxes at the
land surface
3.quantify net carbon flux in boreal landscapes
4.extend weather and climate forecast capabilities
5.develop improved flood and drought prediction
capability
6.develop improved agricultural productivity and
climate change prediction capability
https://www.ecmwf.int/sites/default/files/elibrary/2017/17866-land-surface-data-assimilation-and-downscaling-using-smap-smos-and-
amsr-observations.pdf
5. SMAP Antenna Beam Footprint
SMAP хиймэл дагуулын тухай
SMAP science data - NASA National
Snow and Ice Data Center
Distributed Active Archive Center
(NSIDC DAAC) - NASA ESDIS Project.
http://nsidc.org/data/smap/smap-data.html
SMAP level 4 soil moisture (L4 SM) data were
derived using NASA’s Catchment Land Surface
Model using brightness temperatures observed
by SMAP.
6. SMAP шинжлэх ухааны өгөгдлийн системийн бүтэц, схем
Science data system (SDS)
7. SMAP мэдээ, хугацаа
Level 1 products (within 12 hours of acquisition)
Level 2 products (within 24 hours of acquisition)
Level 3 products (within 50 hours of acquisition)
Level 4 products (within 7 days for soil moisture
and 14 days for carbon net ecosystem exchange)
Эх Мэдээ:
Боловсруулалтын хугацаа:
10. N Title Spatial Coverage
Temporal
Coverage
Spatial
Resolution
Temporal
Resolution
Parameter(s)
1
SMAP L1A Radar Time-
Ordered Parsed Telemetry,
Version 1 (SPL1AA)
N: 85.044, S: -85.044,
E: 180, W: -180
2015/04/15 to
2015/07/07
1 km to 3 km x
1 km to 3 km
49 minute Sigma Nought
2
SMAP L1A Radiometer Time-
Ordered Parsed Telemetry,
Version 2 (SPL1AP)
N: 86.4, S: -86.4, E:
180, W: -180
3/31/2015 40 km x 40 km 49 minute Instrument Counts
3
SMAP L1B Radar Half-Orbit
Time-Ordered Low-
Resolution σo Data, Version
1 (SPL1BS0)
N: 85.044, S: -85.044,
E: 180, W: -180 2014/11/05 to
2016/11/05
1 km to 3 km x
1 km to 3 km
49 minute Sigma Nought
4
SMAP L1B Radiometer Half-
Orbit Time-Ordered
Brightness Temperatures,
Version 3 (SPL1BTB)
N: 86.4, S: -86.4, E:
180, W: -180
3/31/2015 47 km x 36 km 49 minute Antenna Temperature,
Brightness Temperature
5
SMAP L1C Radar Half-Orbit
High-Resolution σo Data on 1
km Swath Grid, Version 1
(SPL1CS0)
N: 85.044, S: -85.044,
E: 180, W: -180 2014/11/05 to
2016/11/05
1 km to 3 km x
1 km to 3 km
49 minute Sigma Nought
6
SMAP L1C Radiometer Half-
Orbit 36 km EASE-Grid
Brightness Temperatures,
Version 3 (SPL1CTB)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 36 km x 36 km 49 minute Brightness Temperature
7
SMAP Enhanced L1C
Radiometer Half-Orbit 9 km
EASE-Grid Brightness
Temperatures, Version 1
(SPL1CTB_E)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 49 minute Brightness Temperature
8
SMAP L2 Radar Half-Orbit 3
km EASE-Grid Soil Moisture,
Version 3 (SPL2SMA)
N: 85.044, S: -85.044,
E: 180, W: -180
2015/04/13 to
2015/07/07
3 km x 3 km 49 minute Sigma Nought, Soil
Moisture
Standard Data Sets
11. Standard Data Sets
N Title Spatial Coverage
Temporal
Coverage
Spatial
Resolution
Temporal
Resolution
Parameter(s)
9
SMAP L2 Radar/Radiometer
Half-Orbit 9 km EASE-Grid
Soil Moisture, Version 3
(SPL2SMAP)
N: 85.044, S: -85.044,
E: 180, W: -180 2015/04/13 to
2015/07/07
9 km x 9 km 49 minute Brightness Temperature,
Sigma Nought, Soil
Moisture
10
SMAP/Sentinel-1 L2
Radiometer/Radar 30-
Second Scene 3 km EASE-
Grid Soil Moisture, Version 1
(SPL2SMAP_S)
N: 60, S: -60, E: 180,
W: -180
4/1/2015 3 km x 3 km 30 second Brightness Temperature,
Sigma Nought, Soil
Moisture
11
SMAP L2 Radiometer Half-
Orbit 36 km EASE-Grid Soil
Moisture, Version 4
(SPL2SMP)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 36 km x 36 km 49 minute Brightness Temperature,
Soil Moisture
12
SMAP Enhanced L2
Radiometer Half-Orbit 9 km
EASE-Grid Soil Moisture,
Version 1 (SPL2SMP_E)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 49 minute Brightness Temperature,
Soil Moisture
13
SMAP L3 Radar Northern
Hemisphere Daily 3 km EASE-
Grid Freeze/Thaw State,
Version 3 (SPL3FTA)
N: 85.044, S: 45, E:
180, W: -180 2015/04/13 to
2015/07/07
3 km x 3 km 1 day Freeze/Thaw State,
Sigma Nought,
Transition Direction
14
SMAP L3 Radiometer
Northern Hemisphere Daily
36 km EASE-Grid
Freeze/Thaw State, Version
1 (SPL3FTP)
N: 85.044, S: 45, E:
180, W: -180
3/31/2015 36 km x 36 km 1 day Brightness Temperature,
Freeze/Thaw State,
Transition Direction
12. Standard Data Sets
N Title Spatial Coverage
Temporal
Coverage
Spatial
Resolution
Temporal
Resolution
Parameter(s)
19
SMAP Enhanced L3
Radiometer Global Daily 9
km EASE-Grid Soil Moisture,
Version 1 (SPL3SMP_E)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 1 day Brightness Temperature,
Soil Moisture
20
SMAP L4 Global Daily 9 km
Carbon Net Ecosystem
Exchange, Version 3
(SPL4CMDL)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 1 day Gross Primary
Productivity (GPP),
Heterotrophic
Respiration (Rh), Net
Ecosystem CO2
Exchange (NEE), Soil
Organic Carbon (SOC)
21
SMAP L4 9 km EASE-Grid
Surface and Root Zone Soil
Moisture Analysis Update,
Version 3 (SPL4SMAU)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 3 hour Root Zone Soil Moisture,
Surface Soil Moisture
22
SMAP L4 9 km EASE-Grid
Surface and Root Zone Soil
Moisture Geophysical Data,
Version 3 (SPL4SMGP)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km 3 hour Root Zone Soil Moisture,
Surface Soil Moisture
23
SMAP L4 9 km EASE-Grid
Surface and Root Zone Soil
Moisture Land Model
Constants, Version 3
(SPL4SMLM)
N: 85.044, S: -85.044,
E: 180, W: -180
3/31/2015 9 km x 9 km Soil Classification, Soil
Depth, Soil Porosity, Soil
Texture, Terrain
Elevation
13. SMAP L4 Global 3-hourly 9 km Surface and
Rootzone Soil Moisture, Version 3
1. SMAP L4 9 km EASE-Grid Surface and Root Zone Soil
Moisture Geophysical Data (SPL4SMGP)
2. SMAP L4 9 km EASE-Grid Surface and Root Zone Soil
Moisture Analysis Update (SPL4SMAU)
3. SMAP L4 9 km EASE-Grid Surface and Root Zone Soil
Moisture Land Model Constants (SPL4SMLM)
14. SMAP L4 Global 3-hourly 9 km Surface and
Rootzone Soil Moisture, Version 3
Geophysical Data (gph)*
Analysis Data (aup)
Forecast_Data (aup)
Observations_Data (aup)
Land-Model-Constants Data (lmc)
Metadata
15. 1. The Geophysical Data (gph) нь 3 цагийн дундаж гадаргын болон үндэсний
гүний хөрсний чийгийн болон геофизикийн мэдээ
SMAP L4 Global 3-hourly 9 km Surface and Rootzone Soil Moisture, Version
3
N Data Field Name Type Shape Unit Valid
Min
Valid
Max
Fill Value
1 baseflow_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.01 -9999
2 heat_flux_ground Float32 LatCell_LonCell_Array W m-2 -1000 1000 -9999
3 heat_flux_latent Float32 LatCell_LonCell_Array W m-2 -2500 3000 -9999
4 heat_flux_sensible Float32 LatCell_LonCell_Array W m-2 -2500 3000 -9999
5 height_lowatmmodlay Float32 LatCell_LonCell_Array m 40 80 -9999
6 land_evapotranspiration_flux Float32 LatCell_LonCell_Array kg m-2 s-1 -0.001 0.001 -9999
7 land_fraction_saturated Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
8 land_fraction_snow_covered Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
9 land_fraction_unsaturated Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
10 land_fraction_wilting Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
11 leaf_area_index Float32 LatCell_LonCell_Array m2 m-2 0 10 -9999
12 net_downward_longwave_flux Float32 LatCell_LonCell_Array W m-2 -1000 200 -9999
13 net_downward_shortwave_flux Float32 LatCell_LonCell_Array W m-2 0 1365 -9999
14 overland_runoff_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.05 -9999
15 precipitation_total_surface_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.05 -9999
16 radiation_longwave_absorbed_flux Float32 LatCell_LonCell_Array W m-2 35 800 -9999
17 radiation_shortwave_downward_flux Float32 LatCell_LonCell_Array W m-2 0 1500 -9999
18 sm_profile Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
19 sm_profile_pctl Float32 LatCell_LonCell_Array percent 0 100 -9999
20 sm_profile_wetness Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
21 sm_rootzone Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
22 sm_rootzone_pctl Float32 LatCell_LonCell_Array percent 0 100 -9999
23 sm_rootzone_wetness Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
24 sm_surface Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
Table 1. Data Fields for Geophysical_Data
16. 1. The Geophysical Data (gph) нь 3 цагийн дундаж гадаргын болон үндэсний
гүний хөрсний чийгийн болон геофизикийн мэдээ
SMAP L4 Global 3-hourly 9 km Surface and Rootzone Soil Moisture, Version
3
N Data Field Name Type Shape Unit Valid
Min
Valid
Max
Fill Value
25 sm_surface_wetness Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
26 snow_depth Float32 LatCell_LonCell_Array m 0 50 -9999
27 snow_mass Float32 LatCell_LonCell_Array kg m-2 0 10000 -9999
28 snow_melt_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.05 -9999
29 snowfall_surface_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.05 -9999
30 soil_temp_layer1 Float32 LatCell_LonCell_Array K 210 340 -9999
31 soil_temp_layer2 Float32 LatCell_LonCell_Array K 210 330 -9999
32 soil_temp_layer3 Float32 LatCell_LonCell_Array K 215 325 -9999
33 soil_temp_layer4 Float32 LatCell_LonCell_Array K 220 325 -9999
34 soil_temp_layer5 Float32 LatCell_LonCell_Array K 225 325 -9999
35 soil_temp_layer6 Float32 LatCell_LonCell_Array K 230 320 -9999
36 soil_water_infiltration_flux Float32 LatCell_LonCell_Array kg m-2 s-1 0 0.05 -9999
37 specific_humidity_lowatmmodlay Float32 LatCell_LonCell_Array kg kg-1 0 0.4 -9999
38 surface_pressure Float32 LatCell_LonCell_Array Pa 40000 110000 -9999
39 surface_temp Float32 LatCell_LonCell_Array K 180 350 -9999
40 temp_lowatmmodlay Float32 LatCell_LonCell_Array K 180 350 -9999
41 vegetation_greenness_fraction Float32 LatCell_LonCell_Array dimensionless 0 1 -9999
42 windspeed_ lowatmmodlay Float32 LatCell_LonCell_Array m s-1 -60 60 -9999
Table 1. Data Fields for Geophysical_Data
17. 2. SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture
Analysis Update (SPL4SMAU): This group contains soil moisture and
temperature estimates after the ensemble Kalman filter analysis.
SMAP L4 Global 3-hourly 9 km Surface and Rootzone Soil Moisture, Version
3
N Data Field Name Type Shape Unit Valid Min Valid Max Fill Value
1 sm_profile_analysis Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
2 sm_profile_analysis_ensstd Float32 LatCell_LonCell_Array m3 m-3 0 1 -9999
3 sm_rootzone_analysis Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
4 sm_rootzone_analysis_ensstd Float32 LatCell_LonCell_Array m3 m-3 0 0.9 -9999
5 sm_surface_analysis Float32 LatCell_LonCell_Array m3 m-3 0 1 -9999
6 sm_surface_analysis_ensstd Float32 LatCell_LonCell_Array m3 m-3 0 1 -9999
7 soil_temp_layer1_analysis Float32 LatCell_LonCell_Array K 210 340 -9999
8 soil_temp_layer1_analysis_ensstd Float32 LatCell_LonCell_Array K 0 50 -9999
9 surface_temp_analysis Float32 LatCell_LonCell_Array K 180 350 -9999
10 surface_temp_analysis_ensstd Float32 LatCell_LonCell_Array K 0 50 -9999
19. SMAP L4 Global 3-hourly 9 km Surface and Rootzone Soil Moisture, Version
3
https://worldview.earthdata.nasa.gov/?p=geographic&l=MODIS_Terra_CorrectedReflectance_TrueColor,SMAP_L4_Analyzed_Root_Zone_Soil
_Moisture(hidden),SMAP_L4_Uncertainty_Analyzed_Root_Zone_Soil_Moisture(hidden),SMAP_L4_Analyzed_Surface_Soil_Moisture,SMAP_L4
_Uncertainty_Analyzed_Surface_Soil_Moisture(hidden),SMAP_L4_Soil_Temperature_Layer_1(hidden),SMAP_L4_Snow_Mass(hidden),Coastlin
es&t=2018-01-10&z=3&v=-26.884893450160334,-28.37985655038601,175.61510654983965,83.27639344961399
SMAP_L4_SM_gph_201803178T223000_Vv3030_001.h5
20. SMAP L4 Global 3-hourly 9 km Surface and Rootzone Soil Moisture, Version
3
https://worldview.earthdata.nasa.gov/?p=geographic&l=MODIS_Terra_CorrectedReflectance_TrueColor,SMAP_L4_Analyzed_Root_Zone_
Soil_Moisture(hidden),SMAP_L4_Uncertainty_Analyzed_Root_Zone_Soil_Moisture(hidden),SMAP_L4_Analyzed_Surface_Soil_Moisture,SM
AP_L4_Uncertainty_Analyzed_Surface_Soil_Moisture(hidden),SMAP_L4_Soil_Temperature_Layer_1(hidden),SMAP_L4_Snow_Mass(hidde
n),Coastlines&t=2018-01-10&z=3&v=-26.884893450160334,-28.37985655038601,175.61510654983965,83.27639344961399
SMAP_L4_SM_gph_20180118T223000_Vv3030_001.h5
37. SMAP Data
The following table lists SMAP science data
that are available at the NASA National Snow
and Ice Data Center Distributed Active
Archive Center (NSIDC DAAC).
http://nsidc.org/data/smap/smap-data.html
39. Variable Description of Data Description of Date/Time for Product
gph Geophysical Data The date/time corresponds to the center point of the 3-hourly
time averaging interval. For example, T013000 corresponds
to the time average from 00:00:00 UTC to 03:00:00 UTC on
a given day.
aup Analysis Update Data The date/time indicates the time of the analysis update. For
example, T030000 indicates an analysis for 03:00:00 UTC
on a given day. This analysis would typically assimilate all
SMAP data observed between 01:30:00 UTC and 04:30:00
UTC.
lmc Land Surface Model
Constants
For the LMC product (time-invariant constants), which
consists of only one file per Science Version, the date/time is
00000000T000000.