Onboard Ultra-Stable Oscillator Long-Term Drift Calibration for Tianwen-1 Mission

被引：0
|
作者：
Cao, Jianfeng [1 ,2 ]
Kong, Jing [1 ,2 ]
Man, Haijun [1 ,2 ]
Ju, Bing [1 ,2 ]
Zhang, Yu [1 ,2 ]
Liu, Huicui [1 ,2 ]
机构：
[1] Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing,100094, China
[2] Beijing Aerospace Control Center, Beijing,100094, China
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2024年 / 49卷 / 12期
关键词：
Doppler - Doppler measurement - Drift callibration - Frequency bias - Long term drift - One-way dopple - Precision orbit determinations - Tianwen-1 - Ultra-stable oscillator - Ultrastable oscillators;
D O I：
10.13203/j.whugis20220082
中图分类号：
学科分类号：
摘要：
Objectives: The stability of ultra-stable oscillator (USO) which provides frequency standard and transmits downlink signal affects the accuracy of one-way Doppler measurements directly. It is a necessity to estimate the frequency bias during orbit determination with one-way Doppler measurements. Methods: First, the one-way Doppler observation model and observation partial derivative are deduced theoretically, and the main error sources affecting the accuracy are analyzed. Then, the frequency deviation is estimated and the USO long-term drift prediction model is constructed during the execution of Tianwen-1 precise orbit determination using the one-way Doppler measurements. Finally, the accuracy of frequency bias resolution is analyzed theoretically based on its key factors. Results: The USO drift rate is 0.075 75±0.006 20 Hz/d. Conclusions: This paper provides a feasible frequency drift calibration method for space-borne USO, and it constructs a priori frequency model for space-borne USO of Tianwen-1. © 2024 Editorial Department of Geomatics and Information Science of Wuhan University. All rights reserved.
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页码：2181 / 2186
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