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针对Cortex CRT基带在INMARSAT标准测距过程中输出的侧音相位数据,设计一种LEOP阶段重构次侧音相位的侧音测距匹配算法。该算法用实测数据修正LEOP阶段的跟踪预报距离误差,用修正后的跟踪预报距离重构次侧音相位,然后用测量的主侧音和重构的次侧音数据解算星地距离。仿真计算与实际飞行任务结果表明,算法可以正确地解算LEOP阶段Cortex CRT基带在INMARSAT标准测距过程中的星地距离。
Aiming at the sidetone phase data of Cortex CRT baseband output during INMARSAT standard ranging, a side-tone ranging matching algorithm for reconstructing the sidetone phase in LEOP stage is designed. This algorithm uses measured data to correct the LEOP stage tracking and forecasting distance error, reconstructs the sidetone phase with the corrected tracking distance, and then uses the measured main sidetone and the reconstructed sidetone data to calculate the star ground distance. The results of simulation and actual mission show that the algorithm can correctly solve the LEOP phase Cortex CRT baseband INMARSAT standard distance measurement in the process of the earth.