Integrally-designed altimeter and radiometer system

Abstract

The invention discloses an integrally-designed altimeter and radiometer system, which comprises an antenna feeder subsystem used for transmitting and receiving radio frequency signals of an altimeterand a radiometer; the altimeter connected with the antenna feeder subsystem, wherein the altimeter adopts a Ku+Ka double-frequency altimeter; the radiometer connected with the antenna feeder subsystem, wherein the radiometer adopts a Ku+K+Ka three-frequency radiometer; and a time sequence and information processing unit used for simultaneously completing a height measurement function of the altimeter and a measurement function of the radiometer according to echo signals of the altimeter and the radiometer. According to the invention, through the integrated design of the double-frequency altimeter and the three-frequency radiometer, the measurement accuracy is improved and the total weight and power consumption of the system are reduced; and in addition, the altimeter and the radiometer aresynchronized with control signals of the information processing unit through the same time sequence, so that interference of signal transmitting of the altimeter on signal receiving of the radiometercan be effectively avoided, and the problem of antenna sidelobe leakage caused by separate design is avoided.

Description

Technical field [0001] The present invention relates to the field of satellite altimetry, particularly to a highly integrated design radiometer system. Background technique [0002] Altimeter satellite remote sensing, with the technology developed a space remote sensing technology, the height of the main load carrying radiometer. Wherein altimeter for emitting radar signals to the sea, the radar signal through the sea surface reflection back to the receiving antenna altimeter, to determine the distance the satellite to the satellite point by measuring the pulse round trip time is then calculated sea surface height of the point of the star, radiometer for assisting altimeter corrected radar signal passes through the delay amount of wet troposphere caused by delay error vapor generated moist convection layer can be up to about 40cm, and the altimeter surface height measurement accuracy is generally required to 2cm ~ 5cm, it is necessary to wet the troposphere delay caused by the co...

AI Technical Summary

Problems solved by technology

The altimeter satellites that adopt the integrated design of altimeter and radiometer include GFO satellite and SARAL satellite, but the altimeter has only one frequency point (Ku or Ka frequency band), and the radiometer has only two frequency points (Ka and K frequency band). , that is, the current integrated design only integrates two frequency bands and three frequency points, and its wet tropospheric delay correction accuracy is worse than that of the traditional three-frequency radiometer

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