Sounder SIPS: Suomi NPP CrIMSS Level 3 Specific Quality Control Gridded Daily SiFSAP V2 (SNDRSNIML3SDSFSP)

The SIFSAP (Single Field-of-View Sounder Atmospheric Products) algorithm provides retrieval for each sounder Field of View (FOV), therefore, it has 3-times higher horizontal spatial resolution and 9-time denser products compared to other current IR sounder products. Since SiFSAP is an FOV-based algorithm, its product variables have an additional dimension which represents the number of FOVs. For CrIS instrument, there are 9 FOVs for each Field of Regard (FOR). The SiFSAP L3 products contain a variety of geophysical parameters retrieved from IR/MW sounder suites measurements, including atmospheric temperature profiles, water vapor, ozone profiles, clouds, and surface properties.

This daily one half degree latitude by one half degree longitude level-3 product starts with level-2 retrieval products with QC values of 0 (best), 1 (good), and 2 (don't use). The Level-3 products maximize the yield of each individual variable and level by collecting all cases where the corresponding Level 2 quality control from the top of the atmosphere down to the level where the QC determines that the value is 0 (best) or 1 (good). Below this level, the data is rejected. This gives the greatest possible yield for any given level and variable.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated August 25, 2026, 09:05 (UTC)
Created April 1, 2025, 19:13 (UTC)
accessLevel public
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harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.5067/EXABRGM029LU
license https://www.usa.gov/government-works
modified 2026-08-17T22:16:01Z
programCode {026:000}
publisher NASA/GSFC/SED/ESD/TISL/GESDISC
resource-type Dataset
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spatial ["CARTESIAN", [{"WestBoundingCoordinate": -180, "NorthBoundingCoordinate": 90, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90}]]
temporal 2015-11-02/2026-08-17
theme {"Earth Science"}