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Development of the Reconstructive Transponder for In-Orbit Calibration of HY-2A Altimeter
Wang, Caiyun; Guo, Wei; Zhao, Fei; Wan, Junzhi; Liu, Peng; Lin, Mingsen; Peng, Hailong; Xu, Chuan; Wang, CY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China.
Department微波遥感部
Source PublicationIEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
2016
Volume9Issue:6Pages:2709-2719
ISSN1939-1404
Language英语
KeywordCalibration Frequency Estimation Hy-2a Altimeter Signal Reconstructive Transponder
AbstractChina's first ocean dynamic satellite HY-2A was launched in August 2011 which carries a dual-frequency (Ku- and C-band) altimeter to measure the global mean sea level. In-orbit calibration is essential for reliably measuring sea-surface height (SSH). This paper concerns a novel approach for HY-2A altimeter in-orbit calibration using a reconstructive transponder, which is different from the existing bent-pipe transponder. The reconstructive transponder captures, tracks, and records the altimeter's pulses, then reconstructs the pulses, and transmits them back to the altimeter. It is carried on a SUV, reduces requirement for a permanent installation site, and is much more flexible and efficient. There is an internal calibration loop to enable the stability of the transponder electronics delay and the system gain. The transponder electronics delay and system gain are obtained through an overall measurement. Another benefit of the signal reconstructive transponder is to accurately estimate the altimeter clock frequency drift. HY-2A altimeter in-orbit calibration campaign started from March 2012, until now more than 70 experiments have been carried out at several sites. On March 31, 2013, HY-2A altimeter side-A failed owing to malfunction of its ultrastable oscillator (USO). And this abnormality is monitored by the transponder. From the successful experiments, HY-2A altimeter side-A and side-B instrument bias are obtained with 1- and 4-cm precisions separately. The USO frequency drifts of the HY-2A altimeter are monitored all through the calibration campaign.
Indexed BySCI ; CPCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5611
Collection微波遥感部
Corresponding AuthorWang, CY (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Caiyun,Guo, Wei,Zhao, Fei,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,2016,9(6):2709-2719.
APA Wang, Caiyun.,Guo, Wei.,Zhao, Fei.,Wan, Junzhi.,Liu, Peng.,...&Wang, CY .(2016).Development of the Reconstructive Transponder for In-Orbit Calibration of HY-2A Altimeter.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,9(6),2709-2719.
MLA Wang, Caiyun,et al."Development of the Reconstructive Transponder for In-Orbit Calibration of HY-2A Altimeter".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 9.6(2016):2709-2719.
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