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Geosynchronous orbit SAR (Synthetic Aperture Radar) echo simulation method and device based on Beidou satellite

A technology of geosynchronous orbit and Beidou satellite, which is applied in the direction of measuring devices, satellite radio beacon positioning systems, radio wave measurement systems, etc., can solve the problems of not being able to truly reflect the characteristics of the ionosphere, and achieve the effect of improving authenticity and reliability

Pending Publication Date: 2022-06-03
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

Even semi-physical simulations based on the conversion of ionospheric data measured by other paths cannot truly reflect the ionospheric characteristics of the line-of-sight direction in the long synthetic aperture time of geosynchronous orbit SAR satellites

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  • Geosynchronous orbit SAR (Synthetic Aperture Radar) echo simulation method and device based on Beidou satellite
  • Geosynchronous orbit SAR (Synthetic Aperture Radar) echo simulation method and device based on Beidou satellite
  • Geosynchronous orbit SAR (Synthetic Aperture Radar) echo simulation method and device based on Beidou satellite

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Embodiment Construction

[0047] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] like image 3 As shown in the present invention, a method for simulating a SAR echo in a geosynchronous orbit of a Beidou satellite, the method includes the following steps:

[0049] Step S01: Deploy an ionosphere monitoring device with a Beidou satellite signal receiving function on the ground, the ionosphere monitoring device can display the Beidou satellite constellation map, output the Beidou satellite ephemeris data, calculate the oblique TEC (STEC) value, and the vertical direction TEC (VTEC) value;

[0050] Step S02: carry out an ionospheric data acquisition test, obtain Beidou satellite ephemeris data by the ionospheric monitoring equipment, calculate the STEC value of the Beidou satellite line-of-sight direction and the VTEC value of the ionospheric monitoring equipment point;

[0051] Step S03: based on the Beidou satellite constellat...

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Abstract

The invention discloses a geosynchronous orbit SAR (Synthetic Aperture Radar) echo simulation method and a geosynchronous orbit SAR echo simulation device for a Beidou satellite, which are used for improving the authenticity and the reliability of echo simulation data. The method comprises the following steps: acquiring Beidou satellite ephemeris data by the ionosphere monitoring equipment, and calculating an STEC value and a VTEC value of a Beidou satellite observation path; determining a candidate synchronous orbit satellite code; obtaining ephemeris data of the selected satellite in an available time period, an STEC value of the sight line direction of the selected satellite corresponding to the available time period, and a VTEC value of an ionosphere monitoring equipment point location; determining a VTEC time-varying typical value, and extracting a group of satellite ephemeris data corresponding to the typical value and STEC data in the selected satellite sight line direction; taking the extracted satellite ephemeris data as a satellite platform orbit data source, and taking the extracted STEC data of the selected satellite sight line direction as an ionized layer data source; and performing geosynchronous orbit SAR echo simulation, imaging simulation and imaging quality evaluation.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar data processing, in particular to a method and device for simulating a SAR echo in a geosynchronous orbit based on a Beidou satellite. Background technique [0002] Spaceborne Synthetic Aperture Radar (SAR) echo signal simulation is the basis for estimating and evaluating system and imaging performance in the design stage of SAR system. SAR echo signal simulation usually consists of four parts: satellite platform simulation, radar system simulation, target model simulation and space environment simulation, such as figure 1 shown. In the process of spaceborne SAR simulation and demonstration, it is necessary to isolate and locate the impact of the satellite platform and the space environment on the performance of the radar system. Therefore, the satellite platform data and space environment data introduced into the spaceborne SAR echo signal simulation must be true and reliable. ...

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Application Information

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IPC IPC(8): G01S13/90G01S19/07
CPCG01S13/90G01S19/072
Inventor 明峰丁赤飚李亮洪峻
Owner AEROSPACE INFORMATION RES INST CAS
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