SMAP Data Product Overview - Federation Of Earth Science Information .

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http://smap.jpl.nasa.gov/SMAP DataProduct OverviewESIP – Summer 2014Copper Mountain, ColoradoBarry WeissJet Propulsion LaboratoryCalifornia Institute of TechnologyPasadena, CAJuly 9, 2014Copyright 2014 California Institute of Technology.Government sponsorship acknowledged.http://smap.jpl.nasa.gov/JPL/Caltech proprietary. Not for public release or redistribution. This document has been reviewed for export control andit does NOT contain controlled technical data. For planning and discussion purposes only.

SMAP Overview - ESIPMission OverviewThe proposed SMAP mission was in the first tier recommendedby 2007 NRC Earth Science Decadal SurveyPrimary Science Objectives :Global, high-resolution mapping of soil moisture and its freeze/thaw stateto: Link terrestrial water, energy and carbon cycle processes Estimate global water and energy fluxes at the land surface Quantify net carbon flux in boreal landscapes Extend weather and climate forecast skill Develop improved flood and drought prediction capabilityProposed Mission Implementation:Observatory Features: 3-axis stabilized spacecraft with zeromomentum biased attitude control Single string avionics and powercontrol/distribution electronics Selected redundancy in ACS sensors,actuators, and telecom radios Deployable fixed solar array Command Telemetry & Doppler via S-band toNEN & SN Science data return at 130 Mbps via an Xband link to the NEN Hydrazine blow-down propulsion2013-07-09 JPL (project & payload mgmt, science, spacecraft,radar, mission operations, science processing)GSFC (science, radiometer, science processing)Risk 7120.5D Category 2; 8705.4 Payload Risk Class “C”Launch Oct. 2014, the baseline plan launch vehicle is Delta-2Orbit Polar sun synchronous; 685 km altitudeDuration 3 yearsPayload L-band SAR (JPL)L-band radiometer (GSFC)Shared 6m rotating (13 rpm) antenna (JPL)Partners California Institute of Technology. Government Sponsorship AcknowledgedBHW-1

SMAP Overview - ESIPProposed SMAP Measurement Approach Instruments:–Radar: L-band (1.26 GHz) High resolution, moderate accuracy soilmoisture Freeze/thaw state detection SAR mode: 3 km resolution Real-aperture mode: 30 x 6 km resolution–Radiometer: L-band (1.4 GHz) Moderate resolution, high accuracy soilmoisture 40 km resolution–Shared Antenna Orbit:–– 6-m diameter deployable mesh antenna– Conical scan at 13 rpm– Constant incidence angle: 40 degrees–– 1000 km-wide swathSun-synchronous orbit6 am local time descending6 pm local time ascending685 km altitudeGlobal coverage once everythree days Mission Operations:–2013-07-093-year baseline mission California Institute of Technology. Government Sponsorship AcknowledgedBHW-2

SMAP Overview - ESIPSMAP Science SMAP will provide highresolution and frequent-revisitglobal observations of soilmoisture and freeze/thaw state3-day mapping coverage– Soil moisture is defined in terms ofvolume of water per unit volume ofsoil– Freeze/thaw state is defined as thephase of the water containedwithin the landscape includingsurface soil and vegetationSMAP measurements of soil moisture and freeze/thawstate address a wide range of Earth science applicationsFrozenLandscapeSurface soil moisture [cm3 /cm3 ]NRC Earth Science Decadal Survey Report, 20072013-07-09 California Institute of Technology. Government Sponsorship AcknowledgedBHW-3

SMAP Overview - ESIPSMAP Science ApplicationsDecadal Survey ObjectiveApplicationWeather ForecastInitialization of Numerical Weather Prediction (NWP)Climate PredictionBoundary and Initial Conditions for Seasonal Climate Prediction ModelsTesting Land Surface Models in General Circulation ModelsDrought and AgricultureSeasonal Precipitation PredictionMonitoringRegional Drought MonitoringCrop OutlookFlood Forecast Improvements River Forecast Model InitializationFlash Flood Guidance (FFG)NWP Initialization for Precipitation ForecastHuman HealthSeasonal Heat Stress OutlookNear-Term Air Temperature and Heat Stress ForecastDisease Vector Seasonal OutlookDisease Vector Near-Term Forecast (NWP)Boreal CarbonFreeze/Thaw ��15 km2–3 days0.04-0.06 (c)50–100 km3–4 days0.04-0.06ResolutionRefresh RateAccuracy(a) Northof 45N latitude2013-07-09(b)Baseline MissionFreeze/Carbon Cycle Soil MoistureThaw1–10 km2–3 days(a)80–70% (b)Percent classification accuracy (binary freeze/thaw)10 km3 days0.043 km2 days80%(c) VolumetricScience orologyHydroclimatologyHydrometeorologyFreeze/Thaw StateMinimum MissionSoilFreeze/MoistureThaw10 km3 days0.0610 km3 days70%water content, 1-σ in [cm3/cm3] units California Institute of Technology. Government Sponsorship AcknowledgedBHW-4

SMAP Overview - ESIPSMAP Applications2013-07-09 California Institute of Technology. Government Sponsorship AcknowledgedBHW-5

SMAP Overview - ESIPProposed SMAP Data ProductsData ProductShort Name2013-07-09DescriptionGridResolutionGranule ExtentL1A RadarParsed Radar Instrument TelemetryHalf OrbitL1A RadiometerParsed Radiometer Instrument TelemetryHalf OrbitL1B S0 LoResLow Resolution Radar σo in Time Order5x30 km(10 slices)Half OrbitL1C S0 HiResHigh Resolution Radar σo on Swath Grid1 kmHalf OrbitL1B TBRadiometer TB in Time Order39x47 kmHalf OrbitL1C TBRadiometer TB36 kmHalf OrbitL2 SM ARadar Soil Moisture ( includes Freeze-Thaw )3 kmHalf OrbitL2 SM PRadiometer Soil Moisture36 kmHalf OrbitL2 SM APActive-Passive Soil Moisture9 kmHalf OrbitL3 FT ADaily Global Composite Freeze/Thaw State3 kmNorth of 45 NL3 SM ADaily Global Composite Radar Soil Moisture3 kmGlobalL3 SM PDaily Global Composite Radiometer Soil Moisture36 kmGlobalL3 SM APDaily Global Composite Active-Passive Soil Moisture9 kmGlobalL4 SMSurface & Root Zone Soil Moisture9 kmGlobalL4 CCarbon Net Ecosystem Exchange9 kmNorth of 45 N California Institute of Technology. Government Sponsorship AcknowledgedBHW-6

High resolution, moderate accuracy soil moisture Freeze/thaw state detection SAR mode: 3 km resolution Real-aperture mode: 30 x 6 km resolution - Radiometer: L-band (1.4 GHz) Moderate resolution, high accuracy soil moisture 40 km resolution - Shared Antenna 6-m diameter deployable mesh antenna Conical scan at 13 rpm

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