3B42

Gauge Combination Error in 2016, Affects 3B42/43 and IMERG Final Run

We have discovered that the gauge analysis was erroneously omitted from the "production" 3B42/43 products starting with January 2016 due to issues with handling a change of data format.  Thus, the production 3B42/43 are being re-computed.  This does not affect the TMPA-RT suite of products, since no month-to-month gauge data are used.

Note this issue also affects the current Version 3 IMERG Final Run products for January 2016.  They are being recomputed as well.  The current Version 3 IMERG Early and Late Runs are not affected.

Jan. 2016 GPM IMERG and Jan.-Jun. 2016 TMPA 3B42/3B43 Data Products are Being Recalled and Replaced

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. 

---

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/

3B4x-RT Failure and Backfilling

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.

Recent 3B41RT and 3B42RT Files Reprocessed

NOAA has reprocessed the global IR data for 10 UTC 26 April
through 14 UTC 27 April due to dropped images, and all 3B41RT and
3B42RT files for this time period have been reprocessed by PPS and are
now available:

   3B41RT.2015042610.7.bin.gz through 3B41RT.2015042714.7.bin.gz
   3B42RT.2015042612.7.bin.gz through 3B42RT.2015042715.7.bin.gz

Such partial dropouts in the IR data result in somewhat lower quality for IMERG Early and Late Runs, but are not cause for reprocessing. 

The Transition in Multi-Satellite Products from TRMM to GPM (TMPA to IMERG)

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).

Mission Affiliation: 
Major Category: 
Author(s): 
Subscribe to RSS - 3B42