Parametrized Rain Impact Model for SMAP L2 V1.0

This 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.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	August 11, 2025, 19:34 (UTC)
Created	March 20, 2025, 18:37 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	fa668ba4-07cf-49b2-beb0-1c60ba21fdfc
harvest_source_id	44069cc8-d515-495f-9ea4-b67f76a0a7cb
harvest_source_title	Science Discovery Engine
identifier	10.5067/PRIMS-2RSW1
landingPage	https://podaac.jpl.nasa.gov/CitingPODAAC
modified	2025-03-27
programCode	{026:000}
publisher	NASA/JPL/PODAAC;UWA/CFR
references	{https://podaac.jpl.nasa.gov/Podaac/thumbnails/PRIM_SMAP_L2_V1.jpg}
resource-type	Dataset
source_datajson_identifier	true
source_hash	7746aa7f94d68bfbe4793350c7b250d4c76c407da6ba8fbd7ffdd40ad212dc83
source_schema_version	1.1
spatial	["CARTESIAN",[{"NorthBoundingCoordinate":90.0,"WestBoundingCoordinate":-180.0,"EastBoundingCoordinate":180.0,"SouthBoundingCoordinate":-90.0}]]
temporal	2015-03-31/2015-03-31
theme	{"Earth Science"}