Imaging wave position determination method based on sea-land target position information
A technology of target position and determination method, which is applied in measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation, etc., and can solve the problems of fast flight speed, complex imaging wave position independent calculation, and large fluctuation of target altitude. Achieve the effect of high calculation accuracy and meet the needs of real-time monitoring and imaging
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[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0036] A method for determining imaging wave positions based on sea and land target position information, comprising the following steps:
[0037] Step 1: Prepare time t according to spaceborne SAR imaging pre , set the PVT data extrapolation time t of the satellite positioning system ex , t ex >t pre .
[0038] Step 2: t according to the WGS84 coordinate system ex Time satellite extrapolation position data P Sat,WGS84 and sea and land target (hereinafter referred to as target) position data P Tar,WGS84 , calculate the vector ΔP of the satellite pointing to the target in the WGS84 coordinate system Sat2Tar,WGS84 .
[0039] ΔP Sat2Tar,WGS84 =P Tar,WGS84 -P Sat,WGS84
[0040] Step 3: Calculate the transformation matrix L from the ...
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