Parametrized Rain Impact Model for SMAP L2 V1.0

(PRIM_SMAP_L2_V1)
Version1.0
Processing Level2
Start/Stop Date2015-Mar-31 to 2021-Oct-01
Short NamePRIM_SMAP_L2_V1
DescriptionThis is the PI-produced SMAP sea water salinity, level 2 v1.0 orbital/swath product from the NASA Soil Moisture Active Passive (SMAP) observatory. It is based on the Parameterized Rain Impact Model (PRIM) developed at the University of Central Florida (UCF) Central Florida Remote Sensing Lab (CFRSL), Orlando, FL; University of Washington (UW) Applied Physics Lab (APL), Seattle, WA.

The PRIM product range extended from March 31, 2015 to September 30, 2021. It includes data for a range of parameters: derived SMAP sea water salinity at surface, 1m depth and 5m depth, and probability of salinity stratification (PSS), rainfall rate and wind speed data. Each data file covers one 98-minute orbit (15 files per day), and corresponds to a JPL SMAP Level 2B CAP Sea Surface Salinity V5.0 file which corresponds to a single orbit on a given day.

The SMAP satellite is in a near-polar orbit at an inclination of 98 degrees and an altitude of 685 km. It has an ascending node time of 6 pm and is sun-synchronous. With its 1000km swath, SMAP achieves global coverage in approximately 3 days, but has an exact orbit repeat cycle of 8 days. On board Instruments include a highly sensitive L-band radiometer operating at 1.41GHz and an L-band 1.26GHz radar sensor providing complementary active and passive sensing capabilities. Observations are global in extent and provided at 25km swath grid with an approximate spatial resolution of 60 km.
DOI10.5067/PRIMS-2RSW1
MeasurementOCEANS > SALINITY/DENSITY > SALINITY
OCEANS > OCEAN WINDS > SURFACE WINDS
OCEANS > PRECIPITATION > LIQUID PRECIPITATION
Swath Width1000 km
Platform/Sensor
SMAP
Platform
Name: Soil Moisture Active and Passive Observatory (SMAP)
Orbit Period: 98.5 minutes
Inclination Angle: 98.0 degrees
/
SMAP L-BAND RADIOMETER
SENSOR
Name: SMAP L-Band Radiometer (SMAP L-BAND RADIOMETER)
Swath Width: 1000.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectSoil Moisture Active Passive (SMAP)
Data ProviderPublisher: PO.DAAC
Creator: Jacob et al.
Release Place: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA91109, USA
Release Date: 2023-Dec-18

FormatnetCDF4
Keyword(s)PRIM, SMAP, SSS, Soil Moisture Active Passive, salinity, polar, sun-synchronous, sss, psu, NASA, project, mission, combined active/passive, L2, PSS, Parametrized Rain Impact Model, Probability of Salinity Stratification, stratification, diffusion
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Temporal Resolution: Hourly - < Daily
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2015-Mar-31 to 2021-Oct-01
Swath Width: 1000 km
 
NameLong NameUnit
KzVertical Diffusivity Coefficientm2 s-1
latlatitudedegree_north
lonlongitudedegree_east
PRIM_S0Sea surface salinity estimated using PRIM1e-3
PRIM_S1mSalinity at 1 meter depth estimated using RIM1e-3
PRIM_S5mSalinity at 5 meters depth estimated using RIM1e-3
PSSProbability of Salinity Stratification1
rain_rateIMERG rain rate closest in time to SMAP observation time & collocated to the center of each SMAP pixelmm hr-1
S_refScripps RG Argo Salinity at 5m depth1e-3
timetime of SMAP observationdays since 2015-1-1 00:00:00 UTC
wind_speedwind speed from SMAP radiometerm s-1
GENERAL DOCUMENTATION
DATA CITATION POLICY
DATA RECIPE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
PI DOCUMENTATION
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation Jacob et al.. 2023. Parameterized Rain Impact Model near-surface salinity and stratification estimates. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/PRIMS-2RSW1

Download Citation
RIS BIB XML JSON-LD

For more information see Data Citations and Acknowledgments.

Journal Reference Drushka, K., Asher, W. E., Ward, B., & Walesby, K.. 2016. Understanding the formation and evolution of rain-formed fresh lenses at the ocean surface, Journal of Geophysical Research: Oceans, 121, 4.