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A Maritime Calibration Method of Radar Beam Azimuth Center

A radar beam and calibration method technology, applied in radio wave measurement systems, instruments, etc., can solve the problem that sea clutter observation radar cannot be calibrated by calibration towers, and achieve the effect of enriching radar calibration methods

Active Publication Date: 2022-02-25
中国电波传播研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for calibrating the azimuth center of the radar beam at sea, which is used to solve the problem that the sea clutter observation radar erected on the top of the island cannot be calibrated by the calibration tower

Method used

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  • A Maritime Calibration Method of Radar Beam Azimuth Center
  • A Maritime Calibration Method of Radar Beam Azimuth Center

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Embodiment 1

[0018] Example 1, such as figure 1 As shown, this embodiment discloses a method for marking the radar beam azimuth center at sea, including the following steps:

[0019] Step 1, route calculation: according to the radar latitude and longitude (LatR, LonR), height H, optical axis azimuth φ 0 , radar beam depression angle α, radar half-power beam width θ 3dB , design the route ab in the direction of the vertical optical axis, such as figure 2 As shown, the distance corresponds to the width of the radar half-power beam irradiation area, and the latitude and longitude of the end point of the route can be obtained through the Vincenty positive solution formula;

[0020] Step 2. Radar signal acquisition: Guide the ship to move at a constant speed along the route through navigation equipment. The ship is equipped with an electromagnetic signal receiver and a receiving antenna, and uses a ship-mounted stable platform to ensure that the center of the receiving antenna beam points to...

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Abstract

The invention discloses a method for calibrating radar beam azimuth center at sea, comprising the following steps: step 1, route calculation; step 2, radar signal acquisition; step 3, azimuth angle calculation corresponding to the maximum value of the signal; step 4, error judgment; step 5 : route adjustment; step 6, photoelectric deviation calculation. The radar beam calibration method disclosed in the invention is suitable for radars erected on the coast and difficult to implement by traditional calibration methods, and can enrich the radar calibration methods in the actual environment.

Description

technical field [0001] The invention belongs to the field of radar calibration, and in particular relates to a method for marine calibration of a radar beam azimuth center in the field. Background technique [0002] The measurement accuracy of radar detection targets determines the radar's working ability to some extent, and is a very important technical indicator. In practical applications, radar measurement errors mainly include random errors and systematic errors. Random errors are usually suppressed by means of statistics, while systematic errors need to be eliminated by certain technical means. [0003] Among many systematic errors, beam pointing error is the most common one. It is caused by the inconsistent pointing of the optical axis and the electrical axis after the radar antenna is installed in place. The optical axis is the visual axis of the optical device installed on the antenna as the axis reference, and the electrical axis is the center direction of the rad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 黎鑫张玉石李慧明李善斌李清亮尹志盈余运超朱秀芹张浙东张金鹏赵鹏许心瑜尹雅磊夏晓云万晋通李笑宇
Owner 中国电波传播研究所