Optimal wave position selecting method of synthetic aperture radar under scanning working mode

A synthetic aperture radar, working mode technology, applied in radio wave measurement system, radio wave reflection/re-radiation, using re-radiation, etc.

Inactive Publication Date: 2013-03-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to make up for the deficiencies of the prior art, aiming at the problem that the wave position can only be selected manually through manual selection and the wave position selection result is not the optimal result of parameters in the scanning working mode, a synthetic aperture radar scanning working mode is proposed Optimal Wave Position Selection Method

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  • Optimal wave position selecting method of synthetic aperture radar under scanning working mode
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  • Optimal wave position selecting method of synthetic aperture radar under scanning working mode

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Embodiment Construction

[0020] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] In this embodiment, the satellite operates on an elliptical orbit, and the parameters of the orbit are specifically as follows:

[0022] Earth radius: 6371.004km

[0023] Orbit height: 800km

[0024] Range of incident angle: 20°~40°

[0025] Downward viewing angle: 30°

[0026] Strip mode resolution: 25m

[0027] Strip width: 135km / 105km

[0028] Earth rotation angular velocity: 7.292115×10 -5 rad / s

[0029] Adopt the optimum wave position selection method of a kind of synthetic aperture radar scan work mode described in the present invention to select the optimum wave position of this satellite scan work mode and emulate, its specific steps are:

[0030] Step 1, according to the limitations of parameters such as distance mapping area, NESZ, and ambiguity, and the optional i group of strip widths {w 1 w 2 ...w i...

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Abstract

The invention provides an optimal wave position selecting method of a synthetic aperture radar under a scanning working mode. The optimal wave position selecting method aims at solving the problem that under the scanning working mode, the selection of wave positions can only be performed manually, and the wave position selecting results are not parameter optimal results. The optimal wave position selecting method comprises the steps of 1, according to the limitation of parameters of the distance to the surveying and mapping area, an equivalent backscattering coefficient maximum value and the fuzzy ratio maximum and optional widths of i groups of bands, respectively performing working mode wave position design on the bands to obtain wave positions of i groups of different band widths, and collecting the wave positions to serve as a wave position set to be selected of the scanning working mode; 2, selecting an initial wave position; 3, constructing a wave position tree; 4, traversing the wave position tree; and 5, selecting the optimal wave position combination.

Description

technical field [0001] The invention relates to a method for selecting an optimal wave position in a scanning working mode of a synthetic aperture radar, which belongs to the technical field of synthetic aperture radar. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-weather high-resolution microwave remote sensing imaging radar that can be installed on aircraft, satellites, spacecraft and other flying platforms. It has unique advantages in environmental monitoring, ocean observation, resource exploration, crop yield estimation, surveying and mapping, and military applications, and can play a role that other remote sensing methods are difficult to play. [0003] The scanning working mode is one of the basic working modes of SAR, which is mainly used for range-wise wide swath imaging. When the SAR works in scanning mode, the antenna transmits pulses on one beam direction and receives the corresponding echo to form the echo data block of th...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S13/90
Inventor 丁泽刚龙腾曾涛尹伟杨文付
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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