As of January 19, 2021, FTP access to the GPM research / production data server "arthurhou" is no longer available, and you must use either FTPS or HTTPS to access GPM research data. Click here to learn more.

Contact Us

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.
  • The information collected will only be used for the purpose of responding to your inquiry.
  • 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