The Precipitation Processing System (PPS) is currently experiencing a hardware problem which is impacting PPS data production, ftp archive access (arthurhou, trmmopen, etc.), and PPS web sites (STORM, THOR, etc.) today - Tuesday May 10,2016.
Our system programmers are currently working on this problem and hope to restore services as soon as possible. We will keep you informed as the situation changes.
We apologize for any inconvenience that this may have caused and...
Below are a few recent satellite anomalies of note that may have affected the quality of the IMERG precipitation products.
10 May 2016: The data flow from the Himawari-8 GEO satellite was interrupted for 57 hours, 7 May, 05 UTC – 9 May, 14 UTC and during that time there is a continuous zone of missing values in the IR precipitation data in the center of the Himawari-8 sector (over Japan), where data from the adjoining GEO satellites are unable to fill the gap. The IR-based...
PPS will be restarting F17 processing. There will be 88 1C products that will be retracted and reprocessed for the following dates:
2016-04-13 (18:29:37) to 2016-04-19 (23:56:53).
Starting from this date and forward all 1C F17 products will flag the 37V channel as bad data and the Brightness Temperatures will be missing.
We apologize for any inconvenience or problems that this may cause and appreciate your understanding and patience.
Please contact us if you have any questions or...
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...
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...
Late on March 2, 2016, the GPM NRT system will begin using V04 algorithms
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...
Thursday, February 25, 2016
Thursday, February 18, 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 or IMERG 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.