The first GRAB satellite was launched 22 June 1960 on the same rocket as Transit 2A, an early naval navigation satellite. Called GRAB 1, it has the distinction of being the first successful U.S. intelligence satellite, returning intelligence data on 5 July 1960. It collected ELINT information over a period of three months, totaling 22 data collection passes of 40 min each over the Soviet Union, China and their allies. The SOLRAD experiment remained operational for 10 months.