US spy satellite agency declassifies high-flying Cold War listening post

The National Reconnaissance Office (NRO) has made a significant revelation by declassifying details about a covert program that played a crucial role in monitoring Soviet military communications during the Cold War. Known as Jumpseat, this initiative was already somewhat known due to prior leaks and media coverage, but the NRO's latest disclosure sheds light on its detailed objectives, development history, and provides images of the satellites involved. Jumpseat has been described by the NRO as the United States' inaugural highly elliptical orbit (HEO) signals-collection satellite system. Between 1971 and 1987, eight Jumpseat satellites were launched, a time when the NRO's existence was itself a closely guarded state secret. These satellites carried out their operations until 2006, primarily focusing on the surveillance of offensive and defensive weapon systems being developed by adversaries. According to the NRO, the Jumpseat satellites were tasked with collecting electronic emissions, communication intelligence, and foreign instrumentation intelligence. The information gathered was channeled to various entities, including the Department of Defense and the National Security Agency, highlighting the program's vital role in national security. The primary target for these intelligence operations was the Soviet Union. Operating in highly elliptical orbits, the Jumpseat satellites reached altitudes ranging from several hundred miles to 24,000 miles (39,000 kilometers) above the Earth. Their unique flight paths allowed them to spend significant time over the northern hemisphere, particularly above the Arctic, Russia, Canada, and Greenland. This strategic positioning provided continuous coverage over critical areas, especially given that the Soviets had already begun deploying their own communication and early-warning satellites in similar orbits, dubbed Molniya, meaning 'lightning' in Russian. The name Jumpseat itself was first disclosed in a 1986 investigative book by Seymour Hersh, who discussed the Soviet Union's shoot-down of Korean Air Lines Flight 007 in 1983. Hersh noted that the Jumpseat satellites had the capability to intercept a wide range of communications, including voice transmissions between Soviet ground personnel and their pilots, underlining the extent and effectiveness of this significant surveillance initiative.