转发式测距设备时延中的温度效应

The effect of temperature on transfer ranging equipment delay

为实现高精度卫星测距,测定了转发式卫星测距地面设备时延与环境温度之间的关系。利用已知发射通道和接收通道时延的调制解调器测定了待测调制解调器的接收通道和发射通道时延,使用转发式卫星测距地面设备测定了地面站设备整体时延。由地面气象仪器获得环境温度参数。利用测定的时延和温度数据研究了设备时延与温度之间的变化关系。统计分析表明:在自然温度条件下,设备时延的变化与温度的变化之间基本呈线性关系。对于高精度卫星测距,温度对设备时延的影响不能忽略。

For realizing satellite ranging with high-precision, the relationship between equipments delay and environmental temperature for satellite ranging earth-station was determined. The transmitting time delay and receiving time delay of the modem were measured by using the modem with known time delays. The time delay of whole equipments for the earth-station was measured by using the transfer ranging equipments of the earth-station. The temperature parameter was collected by using meteorographs. The relationship between the equipments delay and the temperature was studied based on the measurements. The statistic analyses indicate that the equipment delay changes linearly with the natural temperature. The influence of temperature on the equipments time-delay couldn＇t be ignored for high-precision satellite-ranging.