Interplanetary navigation in the 1980's and 1990's

Interplanetary space missions for the 1980's and 1990's will require more accurate and more automated navigation than the missions of the 1970's have required. Spacecraft which have orbited Mars and Venus, landed on Mars, and flown past Jupiter and Saturn are giving way to spacecraft which may orbit Jupiter, Saturn, Uranus, and Neptune, fly past Pluto, fly by or rendezvous with comets and asteroids, return samples from Mars, and fly close to the sun. Starting with the Voyager navigation system as a baseline, anticipated navigation requirements and performance for some of these candidate future missions are discussed, along with navigation system designs and strategies. Various developments in navigation technology, required or desirable for these missions, are treated.