关键词: 重捕时间, 定位精度, 机载BDS 接收机, 动态环境

Abstract: As the top end user of airborne BDS receiver, civil aviation requires more exacting performance. Performance indicators of airborne BDS receiver affected by dynamic environments include reacquisition time, positioning accuracy and so on. In dynamic environment, the above two performance indicators are studied and simulated,analyzing affecting parameters of them, as well as the relationship between the two indicators and relative parameters. Under high speed and high acceleration environment, the reacquisition time and positioning accuracy of airborne BDS receiver are analyzed and simulated based on actual flight data. Results show that the reacquisition time of airborne BDS receiver is affected by parameters such as carrier-to-noise ratio and lockout time, and increases with the increment of aircraft speed. Influencing factors of positioning accuracy include loop noise bandwidth, carrier-to-noise ratio and acceleration, among which the increment of aircraft acceleration causes degrading positioning accuracy ofairborne BDS receiver.

Key words: reacquisition time, positioning accuracy, airborne BDS receiver, dynamicenvironment