Performance Analysis of the GPS Antenna for Satellite Launch Vehicles under the Hot-Temperature Environment

In order to use a GPS antenna for launch vehicles, it should be installed on the skin of the vehicle and be able to normally receive the live GPS signals during the vehicle’s full flight mission. The GPS antenna on the surface of the launch vehicle is, however, exposed to higher temperature than inner equipments of the vehicle due to aerodynamic heating generated during the flight. Test specification of the GPS antenna for qualification of hot-temperature is determined to +95℃ that is higher than inner components by 25℃. Test results in this paper show that the GPS antenna normally operates under the above environment.