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Method for analyzing radiation properties of high-resolution SAR (synthetic aperture radar) satellites

A radiation performance, high-resolution technology, used in satellite radio beacon positioning systems, measuring 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: 2017-01-25
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

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  • Method for analyzing radiation properties of high-resolution SAR (synthetic aperture radar) satellites
  • Method for analyzing radiation properties of high-resolution SAR (synthetic aperture radar) satellites
  • Method for analyzing radiation properties of high-resolution SAR (synthetic aperture radar) satellites

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Embodiment

[0186] According to the given high-resolution SAR satellite system parameters, the method proposed by the present invention is used to calculate the radiation performance index of the system to verify the effectiveness of the method proposed by the present invention. Table 1 shows the parameter table of the high-resolution SAR system to be calculated. According to the method proposed in the present invention, the radiation performance index of the system is calculated, and the calculation result is as follows Figure 2 ~ Figure 6 .

[0187] Table 1 Input parameter table in the embodiment

[0188]

[0189]

[0190] Attached Table 2 Example of radiation performance index calculation results

[0191] parameter Value Azimuth resolution (m) 0.14~0.17 Distance resolution (m) 0.13~0.14 NESZ(dB) -27.54~-21.73 SNR(dB) 3.47~9.38 Radiation resolution (dB) 3.25~3.89

[0192] In this simulation experiment, the radiation performance index was calculated based on a set of high-resolution ...

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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 present invention relates to a high-resolution SAR satellite radiation performance analysis method. The method accurately calculates the radiation performance indicators of various spaceborne SAR operating modes to verify and recheck the system design results of the high-resolution SAR satellite, especially for The high-resolution SAR satellite in variable repetition mode belongs to the technical field of SAR satellite overall design. 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-level resolution of synthetic aperture radar images. Quantitatively express the ability of a synthetic aperture radar system to distinguish two surface targets with diff...

Claims

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Application Information

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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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