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GPM SSM/I on F08 (GPROF) Climate-based Radiometer Precipitation Profiling L2 1.5 hours 12 km V07 (GPM_2AGPROFF08SSMI_CLIM) at GES DISC

Metadata Updated: December 7, 2023

Version 7 is the current version of the data set. Older versions will no longer be available and have been superseded by the current version.

The 'CLIM' products differ from their 'regular' counterparts (without the 'CLIM' in the name) by the ancillary data they use. They are Climate-Reference products, which requires homogeneous ancillary data over the climate time series. Hence, the ECMWF-Interim (European Centre for Medium-Range Weather Forecasts, 2-3 months lag behind the regular production) reanalysis is used as ancillary data to derive surface and atmospheric conditions required by the GPROF algorithm for the 'CLIM' output. The GPROF databases are also adjusted accordingly for these climate-referenced retrievals.

The 2AGPROF (Goddard Profiling) algorithm retrieves consistent precipitation and related science fields from the following GMI and partner passive microwave sensors: + TMI (TRMM) + GMI, (GPM) + SSMI (DMSP F11, F13, F14, F15); SSMIS (DMSP F16, F17, F18, F19) + AMSR2 (GCOM-W1) + MHS (NOAA 18,19) + MHS (METOP A,B) + ATMS (NPP) + SAPHIR (MT1)

This provides the bulk of the 3-hour coverage achieved by GPM. For each sensor, there are nearrealtime (NRT) products, standard products, and climate products. These differ only in the amount of data that are available within 3 hours, 48 hours, and 3 months of collection, as well as the ancillary data used. The NRT product uses GANAL forecast fields. Standard products use the GANAL analysis product, while the climate product uses ECMWF reanalysis in order to allow for consistent data records with earlier missions. These earlier data may be archived separately. The main strength of the product is the large sampling provided.

The GPM radiometer algorithms are Bayesian-type algorithms. These algorithms search an apriori database of potential rain profiles and retrieve a weighted average of these entries based upon the proximity of the observed brightness temperature (Tb) to the simulated Tb corresponding to each rain profile. By using the same a-priori database of rain profiles, with appropriate simulated Tb for each constellation sensor, the Bayesian method is completely parametric and thus well suited for GPM's constellation approach. The a-priori information will be supplied by the combined algorithm supplied by GPM's core satellite as soon after launch as feasible. Databases for V0 of the algorithm had to be constructed from various sources as described in the ATBD. The solution provides a mean rain rate as well as the vertical structure of cloud and precipitation hydrometeors and their uncertainty.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date December 1, 2022
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview

GPM SSM/I on F08 (GPROF) Climate-based Radiometer Precipitation Profiling L2 1.5 hours 12 km (GPM_2AGPROFF08SSMI_CLIM)

Additional Metadata

Resource Type Dataset
Metadata Created Date December 1, 2022
Metadata Updated Date December 7, 2023
Identifier C2264133957-GES_DISC
Data First Published 2022-05-09
Language en-US
Data Last Modified 2022-05-01
Category GPM, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation GPM Science Team. 2022-05-09. GPM_2AGPROFF08SSMI_CLIM. Version 07. GPM SSM/I on F08 (GPROF) Climate-based Radiometer Precipitation Profiling L2 1.5 hours 12 km V07. Greenbelt, MD. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). Digital Science Data.
Creator GPM Science Team
Data Presentation Form Digital Science Data
Graphic Preview Description GPM SSM/I on F08 (GPROF) Climate-based Radiometer Precipitation Profiling L2 1.5 hours 12 km (GPM_2AGPROFF08SSMI_CLIM)
Graphic Preview File
Harvest Object Id f2619dae-e826-4eb8-9928-91a4c605e5c1
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place Greenbelt, MD
Source Datajson Identifier True
Source Hash a8af4559fde8e10989fbadb35e2ba197a90124dbf7c6f8c562904b56707851ff
Source Schema Version 1.1
Temporal 1987-07-09T00:00:00Z/1991-12-31T23:59:59.999Z

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