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High-precision sea surface height extracting method of radar altimeter through small incidence angle interference

A technology of radar altimeter and incident angle, applied in the direction of using re-radiation, radio wave reflection/re-radiation, measuring devices, etc., can solve the problem of not using small incident angle interference

Inactive Publication Date: 2015-01-28
SHANGHAI RADIO EQUIP RES INST
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  • Application Information

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Problems solved by technology

[0005] So far, there is no patent for high-precision extraction of sea surface height using small incident angle interference

Method used

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  • High-precision sea surface height extracting method of radar altimeter through small incidence angle interference
  • High-precision sea surface height extracting method of radar altimeter through small incidence angle interference
  • High-precision sea surface height extracting method of radar altimeter through small incidence angle interference

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Embodiment Construction

[0068] based on the following Figure 1 ~ Figure 4 , specifically explain the preferred embodiment of the present invention.

[0069] The hardware equipment in the radar altimeter provided by the present invention uses for reference the circuit design of the interference synthetic aperture radar, such as figure 1 As shown, the radar altimeter contains:

[0070] The main interference antenna 101 and the auxiliary interference antenna 201 respectively arranged at both ends of the baseline;

[0071] Electrically connected to the main transceiver switch circuit 102 of the main interference antenna 101;

[0072] Electrically connected to the auxiliary transceiver switch circuit 202 of the auxiliary interference antenna 201;

[0073] The main channel receiving module electrically connected to the main transceiver switch circuit 102;

[0074] The auxiliary channel receiving module electrically connected to the auxiliary transceiver switch circuit 202;

[0075] Electrically conne...

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Abstract

The invention relates to a high-precision sea surface height extracting method of a radar altimeter through small incidence angle interference. A small incidence angle and short base line interference processing mode is adopted to carry out synchronous interference receiving on echo signals through a main channel and an auxiliary channel, pre-filtering, two-dimensional image processing, image registration, interference processing, multi-vision processing, phase-position denoising filtering, phase position unwinding, water recognizing, classifying, height conversion and geometric correcting processing are carried out on received data in sequence, and a water area height value is obtained. According to the method, the swath width is large, the temporal-spatial resolution is high, the method can be applied to observation of the ocean current, ocean tide, vortex and other meso and micro scale phenomena in the ocean and the observation of the coastal water, the sea ice shelf and the land hydrology.

Description

technical field [0001] The invention relates to the technical field of radar altimeter, in particular to a method for extracting sea surface height with high precision by interference of radar altimeter with small incident angle. Background technique [0002] At present, space-borne remote sensing equipment used for earth surface height surveying and mapping at home and abroad mainly includes interferometric synthetic aperture radar and radar altimeter. Among them, interferometric synthetic aperture radar uses multiple receiving antennas or multiple observations of a single antenna to perform interference processing. To extract the elevation information of the ground, the interferometric method with a large incident angle (greater than 30°) and a long baseline is generally used, which is mainly used for land elevation measurement. Radar altimeters are mainly used for height measurement of oceans and sea ice shelves. Most altimeters mainly use bottom-view detection, full de-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/02
CPCG01S13/882Y02A10/40
Inventor 卢护林魏维伟王海涛陈潜
Owner SHANGHAI RADIO EQUIP RES INST
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