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IMERG V07 Technical Documentation

Date Last Updated
July 13th, 2023
Document Description

The Integrated Multi-satelliE Retrievals for GPM (*IMERG*) is the unified U.S. algorithm that provides the multi-satellite precipitation product for the U.S. GPM team.

File Downloads
IMERG_TechnicalDocumentation_final_230713.pdf

IMERG V07 FAQ for Applications Users

Date Last Updated
February 24th, 2025
Document Description

This FAQ document provides information specifically aimed at the Integrated Multi-satellitE Retrievals for GPM (IMERG) Version 07 for applications users. As of August 2024, both Initial Processing (IP) and retrospective processing (RP) for the IMERG Early, Late and Final products have been completed for Version 07. IMERG V07 involves a wide range of changes to all aspects of the product, many of which are implemented in response to feedback on V06, which was the first time the IMERG record spanned the TRMM and GPM eras.

File Downloads
FAQ for IMERG V07 Applications Users_202502.pdf

Status of IMERG V07 Final Run Reprocessing

PPS has begun to generate the IMERG V07 Final data product. In the coming months, PPS will create IMERG V07 Final files for the entire period of record, which starts in June 2000. PPS will finish reprocessing Version 07 Final IMERG before starting to generate the V07 near real-time (NRT) IMERG data products. The NRT IMERG data products are IMERG Early (with 4-hour latency) and IMERG Late (with 14-hour latency). Early and Late IMERG reprocessing is currently scheduled to begin in November 2023, and it will take PPS several months to create the full period of record (June 2000 to present)

IMERG V07 ATBD

Date Last Updated
July 12th, 2023
Document Description

This document describes the algorithm and processing sequence for the Integrated Multi-satellitE Retrievals for the Global Precipitation Measurement (GPM) mission (IMERG). This algorithm is intended to intercalibrate, merge, and interpolate “all” satellite microwave precipitation estimates, together with microwave-calibrated infrared (IR) satellite estimates, precipitation gauge analyses, and potentially other precipitation estimators at fine time and space scales for the Tropical Rainfall Measuring Mission (TRMM) and GPM eras over the entire globe.

File Downloads
IMERG_V07_ATBD_final_230712.pdf

IMERG V07 Release Notes

Date Last Updated
November 20th, 2024
Document Description

The algorithm for the Integrated Multi-satellitE Retrievals for GPM (IMERG) has now been upgraded to Version 07.  IMERG V07 involves a wide range of changes to all aspects of the algorithm, many of which are implemented in response to feedback on V06, which was the first time the IMERG record spanned the TRMM-GPM eras.  IMERG V07 is being reprocessed for the entire TRMM-GPM record and thus supersedes all prior IMERG versions, as well as superseding the prior TRMM-based TMPA products (3B42, 3B43).

File Downloads
IMERG_V07_ReleaseNotes_241126.pdf

GPM Level 2 and Level 3 Data Products will be Designated V07B Starting Sat. July, 1, 2023

Commencing with the data date of Saturday July 1, 2023, all GPM Level 2 and Level 3 data products will be updated to the designation V07B. PPS will be making these V07B data products available to the public starting on Thursday July 06, 2023. This version update is necessary since there has been a change to the GPM autosnow input data for these GPM Level 2 and Level 3 algorithms. PPS GPM Level 2 and Level 3 data processing will be on hold between Sat July 01 -Tue July 04, 2023 in order to close out the GPM Level 2 and Level 3 V07A products through June 30, 2023. On Wed July 05, 2023 we will

IMERG V07 Delay

The IMERG V07 algorithm release has been delayed as the team works to address some artifacts discovered during the development process. Currently, a near-complete version of the algorithm is in the integration and testing phase at NASA's Precipitation Processing System (PPS). The IMERG team has also decided to run the Final V07 version first to obtain information that will be useful in the near real-time IMERG V07 Early and Late products. As a result, the Early and Late products will continue to process as IMERG V06 for several months after the Final shifts to Version 07. Please continue to

GPM products will interrupt during the satellite safe-mode patch installation on Tuesday April 18, 2023

On Tuesday April 18, 2023 at 12:00 UTC the GPM Flight Operations Team will be uploading a firmware update to the GPM satellite. During this time the instruments will be shut down and the spacecraft will be put into sun acquisition mode. No science data will be available until the spacecraft is commanded back into Mission Science Mode. Instruments are expected to be back to nominal operations by 20:00 UTC. It will take additional time for PPS production to ingest and verify the data before processing restart. We will provide an update when activities are complete and nominal production has

Rainfall rate estimation over India using global precipitation measurement’s microwave imager datasets and different variants of fuzzy information system

Submitted by LisaN on
Publication Year
Authors
Anand, A., A. S. Dinesh, P. K. Srivastava, S. K. Chaudhary, A. K. Varma, and P. Kumar
Journal
Geocarto International
Volume
37(21)
Page Numbers
6213-6231
DOI
10.1080/10106049.2021.1936208
Mission Affiliation
GPM
Major Category
GPM
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