Distributed InSAR satellite azimuth space synchronization on-orbit test method and system

A test method and azimuth technology, applied in the field of aerospace systems, can solve problems such as application direction, application scope, technical path differences, etc., to achieve the effect of improving effectiveness and reliability
CN112346028AActive Publication Date: 2021-02-09SHANGHAI SATELLITE ENG INST
7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI SATELLITE ENG INST
Publication Date
2021-02-09

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a distributed InSAR satellite azimuth space synchronization on-orbit test method and system. The method comprises steps of 1, calculating an azimuth beam pointing AP01 through amain satellite orbit and attitude information; 2, calculating an azimuth beam pointing AP02; 3, judging whether AP01-AP02 exceeds a threshold or not; 4, calculating an azimuth beam pointing AP11 through an auxiliary satellite orbit and attitude information; 5, calculating a Doppler center AP12; 6, judging whether the AP11-AP12 exceeds a threshold or not; 7, selecting a test sample pair in which AP01-AP02 and AP11-AP12 are located in a threshold range at the same time so that an azimuth space synchronization test result is AP12-AP02 / AW*100%, and AW is the azimuth beam width of the main satellite; and step 8, calculating each group of test sample results, averaging each group of calculated values, further reducing random errors, and obtaining a final test result. The distributed InSAR satellite on-orbit azimuth space synchronization test method can effectively obtain the distributed InSAR satellite on-orbit azimuth space synchronization test result.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of aerospace systems, in particular to a distributed InSAR satellite azimuth space synchronization on-orbit testing method and system. Background technique

[0002] Interferometric Synthetic Aperture Radar (InSAR) is an important remote sensing method to obtain high-precision ground elevation model (DSM). It uses two SAR antennas distributed along the vertical course to observe the same area from different angles of view, and performs interference processing on the two acquired complex SAR images to obtain the slant distance difference between the phase center of the main radar antenna and the target, and then Obtain the DSM of the observation area. The distributed satellite InSAR system installs two SARs on two satellites flying in formation to observe the earth at the same time. It can overcome the problems of time decoherence and low baseline accuracy faced by repeated InSAR passes, and can obtain high-p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More