Precipitation radar onboard the Tropical Rainfall Measuring Mission (TRRM) satellite

The precipitation radar (PR) onboard the Tropical Rainfall Measuring Mission (TRMM) satellite is the first rain radar to measure precipitation from space. After the successful launch of the TRMM satellite in last November, initial checkout of the PR was conducted for about two months. From this checkout, it was confirmed that in-orbit performances of the PR satisfy the specifications.