Data News

Difficulties with accessing NOAA CPC 4-km Merged Global IR data resulted in the loss of IR data in IMERG Early Run for 12 November 12:00-21:30 UTC and 14 November 10:00-15 November 10:30 UTC, and in IMERG Late Run for 12 November 12:00-20:30 UTC and 14 November 10:00-15 November 09:30 UTC.  Subsequently, the IR data were retrieved for use in the Final Run.


PPS will replace GPM Ka/Ku L1B products from JAXA and will reprocess the affected data including Level 2 and 3 data. If you have already obtained products with orbit#32319 from our archive or through a standing order, etc., please discard and use the replacement products when available. 

PPS will replace the following GPM Ka/Ku L1B data: 

  • GPMCOR_KUR_1911060353_0525_032319_1BS_DUB_05C.h5
  • GPMCOR_KAR_1911060353_0525_032319_1BS_DAB_05C.h5

PPS will reprocess the affected L2-3 downstream products. If you have obtained any of these products from our archive or through a Standing Order, etc., please discard these and use the replacement products when available. 

  • 2A.GPM.Ku.V8-20180723.20191106-S035302-E052535.032319.V06A.HDF5
  • 2A.GPM.Ka.V8-20180723.20191106-S035302-E052535.032319.V06A.HDF5
  • 2A.GPM.DPR.V8-20180723.20191106-S035302-E052535.032319.V06A.HDF5
  • 2B.GPM.DPRGMI.CORRA2018.20191106-S035302-E052535.032319.V06A.HDF5
  • 2A.GPM.DPR.GPM-SLH.20191106-S035302-E052535.032319.V06A.HDF5
  • 3A-ORBIT.GPM.DPR.GPM-SLH.20191106-S035302-E052535.032319.V06A.HDF5

If you have any questions, comments or concerns, please do not hesitate to contact us. 


The Precipitation Processing System (PPS) has begun the TRMM and GPM Goddard Convective-Stratiform Heating (CSH) V06A level 2 and level 3 data reprocessing on, Monday October 21, 2019.  This reprocessing will cover the whole life for TRMM and the period from the launch to current for GPM.

The release notes (CHS V06) explaining the key changes from V05A and improvements implemented in the current V06A product will be available later this week and will be posted on the following PPS public web pages as soon as it's provided:

The TRMM/GPM CSH V06A L2-L3 products will be made available through the PPS "arthurhou" ftp archive:

and STORM (PPS's Online Data Ordering Interface):
after these products are produced and archived.

The following data will be reprocessed:

| DataType           | V06A | StartTime                    |
StopTime                      | DOI

| 2HCSH_TRMM | V06A | 1997-12-08 21:15:58 | 2015-04-01 11:58:39
|10.5067/GPM/PRTMI/TRMM/CSH/2H/06                   |  3GCSH_TRMM | V06A 
|| 1997-12-08 21:15:58 | 2015-03-31 23:59:59 |
10.5067/GPM/PRTMI/TRMM/CSH/3G/06                  |
| 3HCSH_TRMM | V06A | 1997-12-01 00:00:00 | 2015-03-31 23:59:59 |
| 2HCSH               | V06A | 2014-03-08 22:09:50 | present
|10.5067/GPM/DPRGMI/CSH/2H/06                             |  3GCSH               
|| V06A | 2014-03-08 22:09:50 |
present                         |
10.5067/GPM/DPRGMI/CSH/3G/06                            |
| 3HCSH               | V06A | 2014-03-01 00:00:00 |
present                         |
10.5067/GPM/DPRGMI/CSH/3B-MONTH/06            |

Please visit our registration portal for access to GPM data products if 
you have not previously registered with PPS:

If you have any concerns, comments or questions, please inform the PPS 
Helpdesk at:


PPS will resume to process NOAA-19 MHS L1C and GPROF products for the granules starting from 09/20/2019 10:22:10 UTC.
There was an issue with the satellite drifting which caused issues with the pre-processing. NOAA/NESDIS updated the processing coefficient and made the NOAA-19 MHS channel 2 L1B data back to normal.


PPS will halt the NOAA-19 L1C and GPROF products for the time being due to problems with the input received.

Indications are that the NOAA-19 MHS channel 2 has failed.   The input data (MSPPS_ORB) used for producing the NOAA-19 MHS L1C product is flagging all the Ta as missing, and as a result the L1C and GPROF products for NOAA-19 have ceased.

We will inform you when and if we have any new details or announcements.

Thank you for your attention and patience during this time.


Beginning with August 19, 2019 at 13:00 UTC, noise in the form of random horizontal lines over the Eastern Pacific began appearing, with most of the problems appearing each following day in the 12:00, 12:30, and 13:00 half-hours, with at least one instance of 13:30.  This was traced to noise in the GOES-W Tb’s (as the result of the faulty sensor cooling system), which made it past the filtering at CPC, where the Merged Global 4-km IR dataset is assembled.  The Early and Late datasets contain these errors, which will be dealt with in the Final computation.


The combined TRMM and GPM-era (June 2000 – present) IMERG V06B products are now available.  This includes the Final product, as well as the retrospectively reprocessed Early and Late products.  These products are staged in the standard locations.  If you have any questions regarding accessibility please contact us.

As the long-record IMERG products are now available, the TMPA and TMPA-RT products have a planned end date of December 31, 2019.  Users should transition to IMERG during this period.  We are hopeful we can extend the IMERG record back to January 1998 in the near future.  

As always, we are interested in your feedback, especially regarding analysis results. This feedback allows us to improve IMERG and provide answers to any questions you may have. Click here to contact us.


IMERG is now available back to June 2000 of the TRMM era.  Both the 'early'
and the 'late' products have been retrospectively processed.  These products are available in the same location on the FTP server as the current GPM IMERG products: /NRTPUB/imerg/early/YYYYMM and /NRTPUB/imerg/late/YYYYMM.

We are in the process of retrospectively processing the GIS-friendly versions and accumulations of these IMERG products. This is likely to be completed by the end of September 2019.


A very important item is that we have been directed to eliminate ftp to all our servers. We know that many of you have scripts that automatically retrieve data.  PPS is attempting to impact you as little as possible. We are putting up an FTPS server.  This means that as long as you have a client that support FTPS you should be able to use almost extactly the same commands as you currently use.

We will soon announce a public access to this FTPS server. You can then test new FTPS scripts against the FTPS server in parallel with continued retrieval using ftp (thereby not interrupting your operational flow).  We hope to be able to provide this parallel access for six months. After 6 months we will be required to eliminate FTP totally.

Please contact us for any questions.


PPS has completed the retrospective processing of IMERG NRT early and late products to version V06B.

All GPM NRT IMERG is available at version V06B from June 2014 through the current IMERG data.

The GPM NRT IMERG from March 2014 through May 2014 will be available once the TRMM era (2000-2014) retrospective processing is completed.

THe V06B data is the default product (early and late) available on the NRT file server.

Please contact us for any questions.



On 16 June 2019 at 22 UTC several hours of missing IR data and subsequent handling of this outage caused IMERG early and late products to be produced without IR data since that date/time.  To ensure consistent early and late IMERG products it was decided to retroprocess these IMERG early and late products.

All early and late IMERG products from 16 June 2019 at 22:00 UTC through June 19 were retroprocessed. You may wish to download the revised products from 16 June 2019 22:00 UTC  onword.

IMERG early and late are being produced again at their required latency: 
    a. early: approx 4 hours from data collection
    b. late:  approx 14 hours from data collection

We are sorry for the extended unavailability of the products.