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Remote Sensing Technology and Application  2021, Vol. 36 Issue (3): 581-586    DOI: 10.11873/j.issn.1004-0323.2021.3.0581
    
In-Orbit Test of Clock Frequency Deviation of HY-2B Satellite Radar Altimeter based on Transponder
Hongbin Cui1,2(),Wei Guo1(),Caiyun Wang1,Te Wang1
1.National Space Science Center,Chinese Academy of Sciences Key Laboratory of Microwave Remote Sensing,Chinese Academy of Sciences,Beijing 100190,China
2.University of Chinese Academy of Sciences,Beijing 100149,China
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Abstract  

The main function of radar altimeter is to measure the global average Sea Surface Height (SSH). It can accurately measure the satellite ground distance by measuring the time interval between sending and receiving pulses. The accuracy of time measurement depends on the accuracy of altimeter clock. During the operation of satellite in-orbit, the frequency of radar altitude clock will drift slowly, which will affect the accuracy of satellite ground distance measurement and result in the measurement deviation of sea surface elevation. Based on the in-orbit test method of altimeter clock deviation of HY-2A satellite based on reconstruction transponder, this paper proposes an estimation method of altimeter clock deviation extracted from the time offset of satellite ground offset function curve, which is applied to the in-orbit calibration test of HY-2B satellite radar altimeter. The frequency drift of radar altimeter is measured, and the accuracy is better than 0.001 Hz. The results show that the performance of the atomic clock of HY-2B altimeter is stable, the range error caused by clock frequency deviation is millimeter magnitude, and the average range drift rate is 2.95×10-7 m/d.

Key words:  HY-2B Satellite      Radar altimeter      Transponder      Clock frequency deviation estimation     
Received:  21 February 2020      Published:  22 July 2021
ZTFLH:  TP722.6  
Corresponding Authors:  Wei Guo     E-mail:  1224155321@qq.com;guowei@mirslab.cn
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Hongbin Cui
Wei Guo
Caiyun Wang
Te Wang

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Hongbin Cui,Wei Guo,Caiyun Wang,Te Wang. In-Orbit Test of Clock Frequency Deviation of HY-2B Satellite Radar Altimeter based on Transponder. Remote Sensing Technology and Application, 2021, 36(3): 581-586.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2021.3.0581     OR     http://www.rsta.ac.cn/EN/Y2021/V36/I3/581

Fig.1  Signal sequence diagram of HY-2B altimeter
Fig.2  Geometric relationship between transponder and satellite
Fig.3  Schematic diagram of satellite receiving and transmitting relationship
Fig.4  Comparison of one-way distance parabola vertex inversion by transponder before and after correction of clock bias
KuC
日期

频率偏差

/Hz

距离偏差

/cm

频率偏差

/Hz

距离偏差

/cm

2019-04-23-0.08850.2321-0.09050.2374
2019-04-27-0.08990.2358-0.09050.2374
2019-04-29-0.08930.2342-0.09020.2367
2019-05-21-0.09020.2367-0.09020.2366
2019-07-02-0.09050.2375-0.09050.2374
2019-09-10-0.09030.2369-0.09010.2362
2019-09-24-0.09020.2365-0.09010.2363
2019-10-22-0.09010.2362-0.09030.2369
2019-11-05-0.09070.2380-0.09030.2369
Table 1  Clock deviation measurement results of HY-2B altimeter
Fig.5  Measurement results of frequency accuracy of atomic clock of HY-2B altimeter
1 Raynal M. HY-2A: Global Statistical Assessment and Cross-calibration with Jason-2 over Ocean[R]. FRANCE: Collecte Localisation Satellites (CLS), 2014.
2 Anzenhofer M, Gruber T. Fully Reprocessed ERS-1 Altimeter Data from 1992 to 1995: Feasibility of the Detection of Long Term Sea Level Change[J]. Journal of Geophysical Research Atmospheres, 1998, 103(C4):8089–8112.doi:.
doi: 10.1029/97JC02566
3 Lillibridge J, Smith W, Scharroo R, et al. The Geosat Geodetic Mission Twentieth Anniversary Edition Data Product [C]∥ AGU Fall Meeting Abstracts. USA: American Geophysical Union, 2004,1:786.
4 Scharroo R, Faugère Y, Roca M, et al. Envisat RA-2 USO Anomaly: Impact and Correction[C]∥ 2007 Envisat Symposium, Eur. Space Agency Spec. Publ.ESA SP-636.2007.
5 Jayles C, Nhun-Fat B, Tourain C. DORIS: System Description and Control of the Signal Integrity[J]. Journal of Geodesy,2006,80(8-11):457-472.doi:.
doi: 10.1007/s00190-006-0046-8
6 Wan J Z, Guo W, Zhao F, et al. HY-2A Radar Altimeter Ultrastable Oscillator Drift Estimation Using Reconstructive Transponder with Its Validation by Multimission Cross Calibration[J]. IEEE Transactions on Geoscience and Remote Sensing,2015,53(9):5229-5236. doi:.
doi: 10.1109/TGRS.2015. 2419670
7 Gong Xunwu, Guo Wei, Wan Junzhi.Study on the Approach for Backscattering Coefficient In-orbit Calibration of HY-2 Altimeter Using A Reconstructive Transponder[J].Remote Sensing Technology and Application,2017,32(2):374-379.
7 龚循武,郭伟,万珺之.基于有源定标器的 HY-2高度计后向散射系数在轨定标方法研究[J]. 遥感技术与应用,2017,32(2):374-379.
8 Wang C Y, Guo W, Zhao F, et al. Development of the Reconstructive Transponder for In-Orbit Calibration of HY-2A Altimeter[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015, 9(6):2709-2719. doi:.
doi: 10.1109/JSTARS.2016.2544759
9 Gong Xiaoyan.Development of Digital Control Unit of the Transponder for HY-2 Altimeter[D].Beijing: University of Chinese Academy of Sciences,2012.
9 宫小艳.HY-2高度计有源定标器数控单元研制[D].北京:中国科学院大学,2012.
10 Mathews M B. Design, Testing, and Performance Analysis of Transponders for Use with Satellite Altimeters.[D]. Boulder, the USA: University of Colorado, 1995.
11 Wan Junzhi. Research on the Absolute Calibration of the Ocean 2 Altimeter System based on Transponder[D].Beijing: University of Chinese Academy of Sciences,2015.万珺之.基于有源定标器的海洋二号高度计系统延迟在轨绝对定标研究[D].北京:中国科学院大学,2015.
12 Jia Xiaolin,Feng Laiping,Mao Yue,et al. Performance Evalution of GPS On-borad Clock[J]. Journal of Time and Frequency,2010,33(2):115-120.
12 贾小林,冯来平,毛悦,等.GPS星载原子钟性能评估[J].时间频率学报,2010,33(2):115-120.
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