The primary purpose of the SDS satellites is to relay imagery from low-flying reconnaissance satellites, notably the Keyhole optic reconnaissance and Lacrosse/Onyx radar reconnaissance satellites to ground stations in the United States.
Key West | Key West, Florida | Key Club | Hole | Francis Scott Key | Woods Hole, Massachusetts | Woods Hole | Hole (band) | Key Biscayne | Key Largo | Jackson Hole | John Key | Key Largo (film) | Key | Chroma key | Black Hole Sun | Woods Hole Oceanographic Institution | Key West, Iowa | Key Stage 3 | Key of Solomon | Hole, Norway | Chroma Key | The Skeleton Key | Public key certificate | Key Stage 2 | Key (company) | Internet Key Exchange | Wookey Hole | The Glass Key | Soul in the Hole |