Absolute calibration method for satellite radar altimeter without special calibration field

A technology of radar altimeter and calibration, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problems of "Ocean No. 2" data application constraints and gaps, and achieve regional balanced distribution , Guaranteed precision and great flexibility

Active Publication Date: 2017-06-23
THE FIRST INST OF OCEANOGRAPHY SOA
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Problems solved by technology

However, my country has launched the "Ocean II" satellite radar altimeter in 2011. There is an urgent need for absolute calibration of the satellite radar altimeter. Domestic researchers have only carrie

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  • Absolute calibration method for satellite radar altimeter without special calibration field
  • Absolute calibration method for satellite radar altimeter without special calibration field
  • Absolute calibration method for satellite radar altimeter without special calibration field

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, a method for absolute calibration of a satellite radar altimeter proposed by the present invention without a special calibration field will be further described below in conjunction with the accompanying drawings and specific examples.

[0036] Such as figure 1 As shown, a kind of satellite radar altimeter absolute calibration method that does not need special calibration field described in the present invention, through the processing to the ocean observation station tidal data that meets the requirements and satellite altimetry data, and adds geoid model, The tide model and other necessary correction items, after unifying the elevation datum, interpolating the spatial position of the altimetry data, and time interpolating the tide data, and finally comparing the difference between the tide sea surface height and the satellite radar altimeter sea surface height, the satelli...

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Abstract

The invention relates to an absolute calibration method for a satellite radar altimeter without a special calibration field and belongs to the technical field of calibration of satellite altimeters. According to the method, an absolute deviation of the satellite radar altimeter can be determined through processing tidal observation data and satellite altimetry data of a satisfactory oceanographic station, adding essential correction entries such as a geoid model, carrying out height datum unification, altimetry data space position interpolation and tidal observation data time interpolation, and finally, carrying out difference comparison on sea surface height of tidal observation and sea surface height of the satellite radar altimeter. Compared with the prior art, the method has the advantages that the special calibration field is not required, the existing oceanographic stations can have calibration capability by using existing business observation data of oceanographic stations of coasts or oceanic islands of our country and a regional accurate geoid, and thus, absolute measured deviations of the satellite altimeters at home and abroad can be acquired.

Description

technical field [0001] The invention relates to an absolute calibration method for a satellite radar altimeter without a special calibration field, and belongs to the technical field of altimeter calibration. Background technique [0002] The currently known satellite radar altimeter is absolutely calibrated by a special calibration field built abroad. "Absolute calibration" is to determine the absolute deviation of the sea surface height measurement of the satellite radar altimeter. Usually, the special calibration field is located on a fixed location on the coast, Install complete calibration equipment on the seabed or offshore platforms to carry out long-term synchronous sea surface height observations. The use of this kind of calibration field needs to design the orbit of the satellite radar altimeter in advance so that it passes through the location of the calibration field. At the same time, the special calibration field needs to invest a lot of money in the station co...

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Application Information

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IPC IPC(8): G01C25/00G01C13/00G01S19/23
Inventor 杨磊周兴华唐秋华雷宁周东旭王朝阳梁冠辉
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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