Multipath Effects on International Space Station Global Positioning System Performance

摘要

Both test and computed results indicate that the multipath producers, located near the space station GPS antennas, can produce carrier phase errors of more than 10 mm from blockages and 5 mm from reflections. This study confirmed that the multipath is a major error source to the 1SS GPS performance and can possibly degrade the attitude determination solution. An integrated GPS/inertial navigation system navigator is being developed to be used as a common navigation solution for the Space Shuttle and space station. It is demonstrated that the GPS antenna carrier phase errors due to multipath from a plate and cylinder can be analyzed using the UTD technique.