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HY-2A Radar Altimeter Ultrastable Oscillator Drift Estimation Using Reconstructive Transponder With Its Validation By Multimission Cross Calibration
Wan, Junzhi; Guo, Wei; Zhao, Fei; Wang, Caiyun; Liu, Peng; Wang, CY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave & Remote Sensing Technol, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationIEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
2015
Volume53Issue:9Pages:5229-5236
ISSN0196-2892
Language英语
KeywordCalibration Frequency Oscillators Radar Altimetry Transponders
AbstractThis paper presents a method estimating the HY-2A altimeter ultrastable oscillator (USO) drift with a reconstructive transponder. The frequency of the USO of the in-orbit altimeter changes with age, and a bias between the actual frequency and the nominal one exists. The USO bias contributes a portion of the altimeter range drift. The HY-2A altimeter transmits signals at a fixed time interval during calibration, and the actual interval between adjacent altimeter transitions, which is controlled by the USO, is different from the nominal one due to the USO drift. The reconstructive transponder measures the arrival times of the altimeter transmitted signals accurately with the atomic clock. The drift of the USO on board the HY-2A altimeter can be estimated accurately by using the ranges from the reconstructive transponder and the HY-2A altimeter. The USO drifts of around 40 cm/year are presented. Furthermore, the multimission cross calibration provides preliminary validation of the HY-2A altimeter USO drift.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4619
Collection微波遥感部
Corresponding AuthorWang, CY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave & Remote Sensing Technol, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wan, Junzhi,Guo, Wei,Zhao, Fei,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.
APA Wan, Junzhi,Guo, Wei,Zhao, Fei,Wang, Caiyun,Liu, Peng,&Wang, CY .(2015).HY-2A Radar Altimeter Ultrastable Oscillator Drift Estimation Using Reconstructive Transponder With Its Validation By Multimission Cross Calibration.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,53(9),5229-5236.
MLA Wan, Junzhi,et al."HY-2A Radar Altimeter Ultrastable Oscillator Drift Estimation Using Reconstructive Transponder With Its Validation By Multimission Cross Calibration".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 53.9(2015):5229-5236.
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