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1. chinaXiv:201605.00286 [pdf]

DEVELOPMENT OF THE RECONSTRUCTIVE TRANSPONDER FOR IN-ORBIT CALIBRATION OF HY-2 ALTIMETER

Wang, Caiyun; Guo, Wei; Zhao, Fei; Wan, Junzhi; Xu, Ke
Subjects: Geosciences >> Space Physics

HY-2 satellite, the first ocean dynamic satellite of China, was launched in August 2011, carrying a dual frequency (Ku band and C band) altimeter, to measure the global mean sea level [1]. To provide truly sea level measurements, in-orbit calibration is essential. This paper concerns the transponder in-orbit calibration method. A signal reconstructive transponder for HY-2 altimeter in-orbit calibration is presented. Different from the existing bent-pipe ones, this kind of transponder can capture and track altimeter pulses, record them, and reconstruct the chirp pulses, transmit them back to the altimeter. It is carried on a SUV, reduces requirement for a permanent installation site. With the characteristics of capture and record altimeter signals, the HY-2 altimeter inner path delay and clock drift could be derived from the calibration data.

submitted time 2016-05-03 Hits844Downloads482 Comment 0

2. chinaXiv:201605.00280 [pdf]

MICAP (MICROWAVE IMAGER COMBINED ACTIVE AND PASSIVE): A NEW INSTRUMENT FOR CHINESE OCEAN SALINITY SATELLITE

Liu, Hao; Zhu, Di; Niu, Lijie; Wu, Lin; Wang, Caiyun; Chen, Xue; Zhao, Xin; Zhang, Cheng; Zhang, Xiangkun; Yin, Xiaobin; Wu, Ji
Subjects: Geosciences >> Space Physics

Sea surface salinity (SSS) plays an important role in global water cycle. In recent years, satellite based remote sensing has proven to be a promising approach for global SSS observation. A new payload concept, named MICAP (microwave imager combined active and passive), has been introduced in this paper. MICAP is a suit of active/passive instrument package, which includes L/C/K band one-dimensional MIR (microwave interferometric radiometer) and L-band DBF (digital beamforming) scatterometer, sharing a parabolic cylinder reflector. MICAP has been selected to be a candidate payload for future Chinese ocean salinity mission. In this paper, the MICAP instrument concept, specification and preliminary system design will be introduced.

submitted time 2016-05-03 Hits829Downloads561 Comment 0

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