had to be developed, tools that found application in subsequent surveillance programs. GRAB 2's SOLRAD experiment (SOLRAD 3) also contributed substantially to solar X-ray astronomy. Three more GRAB satellites were produced, the first two failing to make orbit in 1962. The final scheduled GRAB flight was canceled, and the satellite intended for the mission was ultimately donated to the National Air and Space Museum in 2002. Legacy The GRAB program formally ended with GRAB 2's last transmission in August 1962. After the establishment of the National Reconnaissance Office (NRO) in 1962, the GRAB program was succeeded by the POPPY program, which lasted from its funding authorization in July 1962 until its termination on 30 September 1977. The existence of the ELINT nature of GRAB was declassified by the NRL in 1998. Table of launches References External links GRAB at FAS GRAB at NRL SOLRAD/GRAB at NRL 1962 in spaceflight 1963 in spaceflight Reconnaissance satellites of the United States Military equipment introduced in the 1960s