Parallel Processing GPS Augments TACAN in the Space Shuttle

摘要

NASA's space shuttle program has installed a GPS receiver on each shuttle, in preparation for the phase-out of Tactical Air Navigation (TACAN) ground stations. Working in parallel with the shuttle's TACAN units, the receiver will provide more accurate navigation data and increase the crew's safety. Eventually, NASA will replace all three TACAN units in each shuttle's navigation system with three GPS receivers.