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.

What is the GPM Core Observatory?

The GPM Core Observatory or GPM CO is the name of the GPM’s satellite that carries the two instruments onboard, the GPM Microwave Imager and the Dual Frequency Precipitation Radar, which measure properties of precipitation from space.

Learn more.