A Transponder System Dedicating for the On-Orbit Calibration of China’s New-Generation Satellite Altimeter and Scatterometer
In this paper a transponder system dedicating for the on-orbit calibration of the two primary active microwave sensors: radar altimeter and radar scatterometer are designed. The three major parameters: the height measured by the altimeter, and the backscattering coefficient measured by the altimeter and the scatterometer can be fulfilled in the same system. The transponders proposed in this paper is a pulse-regenerator, which can down-converted the altimeter/scatterometer Radio Frequency (RF) signal to the baseband and record the digital samples, then regenerate a “modulated signal which is to the altimeter/scatterometer receiver. The power, triggering time and the modulation are all adaptive, so the transponder has much greater flexibility than the conventional bent-pipe (pulse-repeated) transponder, which only offer simple time-delay or attenuation/amplification at the RF stage. In this paper the backgrounds are reviewed, the implementations of a new transponder system are introduced, and the calibration rationales are described. Particularly, the configuration of three transponders is optimized to exploit the potential of the new technology.
Transponder altimeter scatterometer calibration configuration.
Guo Wei Gong Xiao-Yan Xu Xi-Yu Liu He-Guang Xu Chuan-Dong Du Yue-Heng
The CAS Key Laboratory of Microwave Remote Sensing, Center for Space Science and Applied Research,Ch The CAS Key Laboratory of Microwave Remote Sensing, Center for Space Science and Applied Research,Ch Electronics Information Engineering, Department of Electronic Engineering, 100084, Tsinghua Universi
国际会议
2011 IEEE CIE International Conference on Radar(2011年IEEE国际雷达会议RADAR 2011)
成都
英文
22-25
2011-10-24（万方平台首次上网日期，不代表论文的发表时间）