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Radiation Performance Analysis Method of High Resolution SAR Satellite

A radiation performance, high-resolution technology, used in satellite radio beacon positioning systems, measurement devices, instruments, etc., can solve the problem of time-varying characteristics without considering other parameters, resolution and space-varying characteristics, not suitable for high-resolution SAR satellites, etc. question

Active Publication Date: 2018-08-31
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

This method helps to improve the calculation accuracy, but it does not consider the time-varying characteristics of other parameters and the space-varying characteristics of resolution, and it is still derived based on a constant PRF, so it is still not suitable for high-resolution SAR satellites

Method used

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  • Radiation Performance Analysis Method of High Resolution SAR Satellite
  • Radiation Performance Analysis Method of High Resolution SAR Satellite
  • Radiation Performance Analysis Method of High Resolution SAR Satellite

Examples

Experimental program
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Embodiment

[0186] According to the given high-resolution SAR satellite system parameters, the radiation performance index of the system is calculated by using the method proposed by the invention, and the validity of the method proposed by the invention is verified. Table 1 has provided the high-resolution SAR system parameter list to be calculated, according to the method proposed by the present invention, calculate the radiation performance index of this system, calculation result is as follows Figure 2 ~ Figure 6 .

[0187] Table 1 Input parameter table in the embodiment

[0188]

[0189]

[0190] Table 2 Calculation results of radiation performance indicators in the examples

[0191]

[0192] The simulation test is based on a set of high-resolution SAR satellite parameters to calculate the radiation performance index. The system works in the X-band, adopts the sliding spotlight mode, the expected resolution is 0.2m, the imaging scene width is 12.77km, the imaging scene le...

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Abstract

The invention relates to a method for analyzing radiation properties of high-resolution SAR (synthetic aperture radar) satellites, and belongs to the technical field of overall designs of SAR satellites. The method has the advantages that radiation property indexes of various satellite-borne SAR working modes are accurately computed, and system design results are inspected and rechecked for the high-resolution SAR satellites and the high-resolution SAR satellites in variable-repetition-frequency modes in particular; echo signal energy starts to be computed point by point along imaging time from single-pulse radar equations, accordingly, time-dependent variation conditions of antenna gain, ground-object back-scattering coefficients, slope distances and radar scattering areas of the SAR satellites can be sufficiently reflected, accurate imaging echo signal energy can be obtained, and the accurate radiation property indexes of the high-resolution SAR satellites further can be obtained.

Description

technical field [0001] The invention relates to a method for analyzing the radiation performance of high-resolution SAR satellites. The method checks and reviews the system design results of high-resolution SAR satellites by accurately calculating the radiation performance indicators of various space-borne SAR operating modes, especially for systems based on The high-resolution SAR satellite with variable repetition frequency mode belongs to the technical field of overall design of SAR satellites. The high-resolution means that the resolution of the SAR satellite is better than 0.4m, that is, less than 0.4m. Background technique [0002] High-resolution SAR satellite radiation performance indicators include signal-to-noise ratio (SNR), noise equivalent backscatter coefficient (NESZ) and radiation resolution, etc., which are used to measure the gray-scale resolution of synthetic aperture radar images. Quantitatively expresses the ability of a synthetic aperture radar system t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 韩晓磊张庆君刘杰张润宁闫雪梅
Owner BEIJING INST OF SPACECRAFT SYST ENG
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