V04 Processing processing of GMI GPROF retrievals began at 11:20 UTC, May 2. Please note the the GPM Near-realtime (NRT) subsystem began to run the V04A GPROF precipitation retrieval effective 11:20UTC, May 2, 2016. Information about changes in the version can be found in the document GMI.V4.Release.Notes_05.01.2016.pdf that is located in directory /NRTPUB/V4ReleaseInfo The biggest change in the retrieval is the use of an a-priori database constructed from Combined and KU actual mission retrievals rather than the pre-launch composite databases. Partner radiometer (both conincally scanning and...

There continues to be intermittent anomalies in the F17 37v channel. The science team is in the process of making a decision on how to proceed forward with the F17 SSMIS data. PPS will be halting L1C forward production of the F17 data until a decision is reached. Please note that this information pertains only to the PPS Standard Research products. Additional information will be sent for NRT (Near realtime) as appropriate. We apologize for any inconvenience or problems that this may cause and appreciate your continued patience. We will send notification updates whenever we receive new...

Beginning on April 6, anomalies in the input SSMIS F17 precipitation estimates were detected in the IMERG Early and Late runs. These anomalies manifest as episodic “swath shaped” areas of high precipitation over land which appear to affect most orbits to some degree. The root cause is degradation in the 37 GHz V polarization channel. On April 13 the issue was somewhat mitigated but we continue to monitor the situation. Please let us know if you detect these (or other anomalies) in the IMERG Early and Late Runs after April 13.

Late on March 2, 2016, the GPM NRT system will begin using V04 algorithms for: Level 1B GMI Level 1C GMI Level 1 Radar Level 2 Radar Level 2 Combined V04 is the first version that uses GPM as the calibrator for the constellation rather than TRMM. The GPROF database is built using the combined observations. GMI is extremely well calibrated and the brightness temperatures in 1B and 1C are an important improvement over those in V03. V04 also made improved retrievals in the Ku, Ka, and DPR Level 2 products. Combined has also made retrieval improvements in this version. GPROF the algorithm used for...

PPS will commence Version 4 processing of GPM and Partner satellite products in early March 2016. All current Version 3 products will be processed through February 29, 2016. Once the current products are completed there will be a delay before the first version 4 products will be made available to the public. The first data date for version 4 will be March 1, 2016. Once PPS has verified the processing and products for version 4 they will be released and made available from our ftp site. At this time PPS will commence reprocessing. GPM products will be reprocessed back to launch, March 2014...