An instrument package flown on ERBS (launched October 1984), and also on the NOAA-9 and -10 polar-orbiting satellites (launched December 1984 and September 1986, respectively). ERBE consists of separate scanning and nonscanning instruments that were designed to determine the monthly average radiation budget on regional, zonal, and global scales. An earlier earth radiation budget instrument was flown on Nimbus-6 and -7 (launched June 1975 and October 1978).