1. Home
  2. GPM

GPM

Content which is affiliated solely with the Global Precipitation Measurement Mission.

Notification of Upcoming GPM Orbit Boost

The GPM Core Observatory satellite is scheduled to undergo a series of orbit boost maneuvers which will raise its altitude from 400km to 435km. These boosts are tentatively scheduled for Nov. 7 and 8, 2023. As a result of these maneuvers, the observing parameters of data collected by the GPM Microwave Imager ( GMI) and Dual-frequency Precipitation Radar ( DPR) instruments will change, including the footprint sizes and Earth incidence angle. The algorithms which process these data must be updated to accommodate these changes, including the Level 2 GPROF, DPR, and CORRA algorithms; the Level 3

Cross validation of the network of ground-based radar with GPM during the Remote sensing of Electrification, Lightning, And Mesoscale/microscale Processes with Adaptive Ground Observations (RELAMPAGO) field campaign

Submitted by LisaN on
Publication Year
Authors
Arias, I., and V. Chandrasekar
Journal
J. Meteor. Soc. Japan
Volume
99(6)
Page Numbers
1423-1438
DOI
10.2151/jmsj.2021-069
Mission Affiliation
GPM
Major Category
GPM

IMERG V07 Final Processing has Begun

Retrospective processing of IMERG V07 Final Run has commenced as of July 2023 using the new IMERG V07 algorithm. The TRMM and GPM eras are being processed in parallel, starting at the beginning of each dataset, with a projected end date no later than Nov. 2023. IMERG V06 and V07 are sufficiently different that users are discouraged from mixing data from the two versions. V07 Early and Late Run processing will commence after the Final Run is completed. The projected timeline for IMERG V07 processing is shown in the figure below. IMERG download links are listed on the GPM website Data Directory

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
August 13th, 2026
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_260813.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
Subscribe to GPM