Two Decades of IMERG: Resources
NASA Announces Long-term IMERG Satellite Record: A Near-Global 19-year Perspective on Rain and Snow
TMPA
Anomalies in TMPA-RT Dec. 18 - 19, 2016
Post Date:
12/23/2016
Anomalies in the DMSP F-16 input data for the TMPA-RT created streaks of precipitation over open-ocean regions. We have now deleted faulty data and rerun the TMPA-RT for the period:
18 December 2016 at 09 UTC to 19 December 2016 at 18 UTC.
Please re-pull the affected data files.
There appears to be no corresponding issue with the IMERG data files due to different quality control routines.
Jan. 2016 GPM IMERG and Jan.-Jun. 2016 TMPA 3B42/3B43 Data Products are Being Recalled and Replaced
Post Date:
09/26/2016
UPDATE 9/27/16:
January 2016 IMERG has been regenerated and posted. This was necessary
due to an error that omitted the gauge analysis in the Final products.
Also, 3B42/3B43 have been recomputed and posted. Let me know if you have
any further questions.
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PPS has removed the January 2016 GPM IMERG and January through June 2016 3B42/3B43 TMPA products from our ftp archive:
ftp://arthurhou.pps.eosdis.nasa.gov/
SSMIS Outage Affecting TMPA and IMERG
Post Date:
09/08/2016
FNMOC is behind in providing the SSMIS data used in IMERG. Therefore, the Early and possibly Late IMERG products will contain less satellite estimates and be of somewhat lesser quality.
TMPA - IMERG Comparison
Document File:
Published Date:
08/31/2016
A table comparing the older TRMM Multi-satellite Preciptiation Analysis (TMPA) datasets with the new Integrated Multi-satellitE Retrievals for GPM (IMERG) datasets.
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Potential Upcoming Data Outages Due to Severe Winter Storm
Post Date:
01/22/2016
The Washington, DC area is about to get hit with a record-level snow storm, with attendant disruptions to work schedules, travel, communications, and power. If you find that the TMPA-RT products drop out, it is safe to assume that some combination of these effects is preventing production, and we will work to restore service when that is possible.
3B4x-RT Failure and Backfilling
Post Date:
01/04/2016
With the turnover of the year to 2016, the suite of 3B40RT, 3B41RT, and 3B42RT failed to process. Despite the holiday weekend, this was traced to a very old quality control on the date/time, fixed, and retrospectively processed to give a complete time series. Thanks to Erich Stocker and David Bolvin for this effort.
The affected date/times are 160101 00UTC through 160102 12UTC.
The Transition in Multi-Satellite Products from TRMM to GPM (TMPA to IMERG)
Document File:
Published Date:
11/01/2019
The transition from the Tropical Rainfall Measuring Mission (TRMM) data products to the Global Precipitation Measurement (GPM) mission products is well underway. This document specifically addresses the multi-satellite products, the TRMM Multi-satellite Precipitation Analysis (TMPA), the real-time TMPA (TMPA-RT), and the Integrated Multi-satellitE Retrievals for GPM (IMERG).
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