Precipitation Processing System (PPS) servers will be down for extended maintenance from Tuesday, September 22nd through Thursday September 24th. During this time the PPS websites, the PMM Publisher API, and the GPM research data server (arthurhou) will be unavailable. The GPM near real-time server (jsimpson) and satellite data collection will not be affected. Click here to learn more.

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Please use the form below to contact the NASA Global Precipitation Measurement mission team.


  • Please read our FAQ before contacting us to check if your question has been answered.
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  • When submitting a question about TRMM or GPM data, please include the name of the product / algorithm you are using (e.g. 3B42RT) and the URL or source you downloaded the data from (e.g. the PPS FTP).
  • For questions about permission for using NASA images and videos, please refer to NASA's official Media Usage Guidelines. For any additional questions please contact