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Control method of geosynchronous earth orbit (GEO) synthetic aperture radar (SAR) for covering all over China

A technology of synthetic aperture radar and geosynchronous orbit, which is applied in the direction of feedback control, radio wave reflection/re-radiation, and measurement devices. It can solve the problem that GEOSAR cannot cover the entire territory of China, improve coverage characteristics, and reduce energy consumption. , Easy engineering effect

Inactive Publication Date: 2012-08-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, according to the engineering realization capability of the phased array antenna at this stage, the ±7.5° phase scanning in the azimuth direction cannot be realized, and only the one-dimensional phase scanning in the range direction can be realized. At this time, the beam coverage is perpendicular to the velocity of the satellite inertial system a strip such as figure 2 shown
The simulation shows that GEO SAR, which only has the capability of one-dimensional phase scanning in the range direction, cannot cover the whole of China, and there are about 40% blind spots

Method used

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  • Control method of geosynchronous earth orbit (GEO) synthetic aperture radar (SAR) for covering all over China
  • Control method of geosynchronous earth orbit (GEO) synthetic aperture radar (SAR) for covering all over China
  • Control method of geosynchronous earth orbit (GEO) synthetic aperture radar (SAR) for covering all over China

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Embodiment Construction

[0026] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] In this embodiment, the satellite where the SAR is located operates on a geosynchronous orbit (GEO) with a small eccentricity, and its sub-satellite track is located in the middle of my country. The average orbital parameters are as follows: the semi-major axis is 42164.2Km; the orbital inclination is 53°; the eccentricity is 0.07 ; The depression angle of perigee is 270°; the longitude of intersection point is 105°. Such as figure 1 shown.

[0028] The whole territory coverage of China by the satellite is completed by adopting the control method of the geosynchronous orbit synthetic aperture radar covering the whole territory of China described in the present invention. Among them, the simulation of the beam coverage area, the calculation of geometric parameters and revisit time are carried out with the help of STK (Sat...

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Abstract

The invention discloses a control method of a geosynchronous earth orbit (GEO) synthetic aperture radar (SAR) for covering all over China, which belongs to the technical field of synthetic aperture radars and overcomes the defect that the GEO SAR is capable of realizing one-dimension phase scanning in direction only rather than covering all over China under limitation of engineering implementation capacity of a phased array antenna at the present stage. In the control method, a satellite platform with the SAR has at least 2-degree pitching maneuver capacity and the SAR has the one-dimension phase scanning capacity in distance. By means of maneuver of pitching angle of the satellite platform and phase scanning in direction of the SAR, any locations within China can be observed as needed, the defect of one-dimension phase scanning of GEO SAR for covering all over China is overcome, and engineering implementing is facilitated.

Description

technical field [0001] The invention relates to a control method for a geosynchronous orbit synthetic aperture radar covering the whole of China, belonging to the technical field of synthetic aperture radar. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-time modern high-resolution microwave imaging radar that can be mounted on various flight platforms such as aircraft, satellites, and airships. SAR has played an increasingly important role in land surveying, crop and vegetation analysis, ocean and hydrological observation, environmental and disaster monitoring, resource exploration, topographic mapping and micro-change monitoring, and military reconnaissance. [0003] Without exception, these application fields put forward higher requirements on the time and space coverage performance of SAR. For example, the national land census requires a wide range of SAR observations, and disaster monitoring requires a short response time of SAR. T...

Claims

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Application Information

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IPC IPC(8): G05D3/12G01S13/90
Inventor 龙腾胡程高阳特丁泽刚朱宇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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