Geosynchronous orbit satellite microwave image resolution improving method

A geosynchronous orbit, resolution technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of reducing the Wiener filter resolution enhancement effect, disadvantageous to the high timeliness detection advantage of geosynchronous orbit, etc.

Inactive Publication Date: 2014-05-21
BEIHANG UNIV
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However, because the instantaneous field of view of the satellite antenna pattern in geosynchronous orbit will change with the detection position, the resolution enhancement effect of Wiener filtering is reduced; although the SIR method can consider t

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  • Geosynchronous orbit satellite microwave image resolution improving method
  • Geosynchronous orbit satellite microwave image resolution improving method
  • Geosynchronous orbit satellite microwave image resolution improving method

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[0058] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0059] The present invention provides a method for enhancing the resolution of a geosynchronous orbit satellite microwave remote sensing image, such as figure 1 shown, by the following steps:

[0060] Step 1: Set the parameters of the microwave remote sensing system of the geostationary orbit satellite, including the detection frequency f (54GHz), spatial resolution (instantaneous field of view width) D (94km), sampling interval Δs (10km), noise (0.5K), detection range 1000km×1000km; and the geographic location parameters of the target area, including the coordinates of the center position of the target area (20°E, 20°N).

[0061] Step 2: According to the parameters in step 1, obtain the microwave remote sensing image by the following method;

[0062] a. Obtain a sampling matrix with the earth surface point C as the center of the instantaneous...

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Abstract

The invention discloses a geosynchronous orbit satellite microwave image resolution improving method and relates to the field of microwave remote sensing. The method includes the following steps that satellite microwave remote sensing system parameters are determined; target area parameters are set; measured data of earth observation of a geosynchronous orbit satellite is obtained through sampling, and a whole microwave remote sensing image is obtained through resampling; a microwave remote sensing image is processed by using a projection ball method, and image information errors caused by earth curvature in a sampling process are removed; wiener filtering is conducted on the image obtained after coordinate projection, and image space resolution is improved; the image subjected to wiener filtering is subjected to inverse fourier transformation and coordinate transformation, and the image with improved resolution is obtained. By means of the method, the geosynchronous orbit satellite microwave image with higher resolution can be obtained, the method is especially suitable for detecting images large in span and away from a subpoint area, efficiency is higher, and the method has better adaptation and compatibility.

Description

technical field [0001] The invention relates to a microwave remote sensing image processing method, in particular to a method for enhancing the resolution of microwave images of geosynchronous orbit satellites. Background technique [0002] Resolution enhancement is an important method for image processing in microwave remote sensing of geostationary satellites, which can improve the spatial resolution of remote sensing images. Geostationary orbit satellites are located in orbits 36,000 km above the ground. The orbital period of the satellites is the same as the rotation period of the earth, the direction is the same, and the orbital plane coincides with the equatorial plane. Geostationary orbit satellites have high timeliness and continuous detection capabilities, but due to the high orbital altitude, the microwave remote sensing images of geostationary orbit satellites usually only have low spatial resolution. 50-70GHz is an important frequency band in geosynchronous orbi...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 刘大伟刘凯吕长春魏川奇苗俊刚
Owner BEIHANG UNIV
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