Method and system for acquiring relative geometrical distance between satellite and ground
A technology of geometric distance and acquisition method, applied in the field of microwave remote sensing, can solve problems such as adverse effects of subsequent processing, and achieve the effect of improving technical complexity and cost
Active Publication Date: 2014-03-19
NAT SPACE SCI CENT CAS
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However, the method of measuring the ranging deviations separately and then subtracting them from the signal of the scaler will introduce new deviations into the signal of the scaler, which will have an adverse effect on the subsequent processing
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[0037] The solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] The purpose of the present invention is to provide a new data processing method, by means of radar receiving data and scaler receiving data, a quadratic function curve can be obtained, and the linear term coefficient and the quadratic term coefficient of the curve and the scaler The received signal curves are theoretically the same, so they can be used for processing. At the same time, the curve does not need third-party measurement equipment other than the radar and the scaler, that is, without introducing the measurement deviation of the third-party equipment, it eliminates the scaler and radar equipment deviation in the signal received by the scaler.
[0039] The data processing method provided by the invention utilizes the specific relationship between the scaler signal and the radar signal in the calibration proces...
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The invention provides a method and a system for acquiring the relative geometrical distance between a satellite and the ground. The method includes the steps: 101) acquiring a first distance sequence corresponding to a pulse transmitting and receiving interval and generated by a height gauge, and acquiring a second distance sequence corresponding to a pulse receiving interval and generated by a calibrator after calibrating a transmitting and receiving stage; 102) obtaining the difference value between the second distance sequence and the first distance sequence and acquiring a geometrical distance difference sequence between the satellite and the ground; 103) accumulating the acquired geometrical distance difference sequence between the satellite and the ground to finally obtain the relative geometrical distance sequence between the satellite and the ground. In the generating process of the relative geometrical distance between the satellite and the ground, the influence of distance measuring bias can be directly eliminated in the processing process without relying on any third-party measuring instruments except for radar and the calibrator, and specific numerical values of the distance measuring bias introduced by Doppler effect of relative movement of the satellite and the ground.
Description
technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a method and system for acquiring the relative geometric distance between a satellite and the ground. Background technique [0002] When the pulse reconstruction active scaler calibrates the radar, the signal will be sent and received between the scaler and the radar. When the electromagnetic wave propagates in the atmosphere, the refraction of the ionosphere and the troposphere to the electromagnetic wave will make the propagation path of the electromagnetic wave deviate from the geometric straight line path. In the calibration work, this effect can be regarded as the propagation distance of the electromagnetic wave is longer than the geometric straight line distance, that is, there is a delay. The influence of this atmospheric delay exists in the original received data of the radar and the scaler at the same time, and cannot be ignored in the calibration work,...
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IPC IPC(8): G01S7/36G01S7/40
CPCG01S7/023G01S7/40
Inventor 万珺之郭伟王彩云赵飞刘鹏何佳宁蔡朋飞谌华
Owner NAT SPACE SCI CENT CAS