High-precision full-link spaceborne SAR radiation calibration simulation method
A radiation calibration and simulation method technology, which is applied in the field of high-precision full-link spaceborne SAR radiation calibration simulation, can solve the problems of high difficulty and high experimental cost
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Embodiment 1
[0091] Such as figure 1 As shown, a high-precision full-link spaceborne SAR radiation calibration simulation method provided by the embodiment of the present invention includes the following steps:
[0092] S1. Read in the real radar satellite data: read in the real radar satellite data of the scene that meets the requirements of the calibration field.
[0093] This step selects real radar satellite image products. Preferably, the scenes read in in step S1 should be uniformly distributed in a sufficiently large range, and the backscattering intensity is weak and does not exceed the threshold, so that after deploying the calibration device, To meet the requirements of high signal-to-clutter ratio, that is, the selected scene should meet the requirements of the general calibration field, and the calibrator can be actually installed.
[0094] S2. Selecting a simulation data source: According to the radar satellite data read in step S1, select an area object whose range and azimu...
Embodiment 2
[0166] Such as Figure 2-Figure 11 As shown, the second embodiment is basically the same as the first embodiment, and the similarities will not be repeated. The difference lies in:
[0167] This embodiment selects the standard strip mode radar image product of the Amazon tropical rainforest imaged by Gaofen No. 3 radar satellite, such as figure 2 shown. Select a surface object with 512 points in both the range direction and the azimuth direction as the calibration simulation data source, such as image 3 shown. The starting position of the target azimuth of this surface is 2300, and the starting position of the range is 6500. The RCS in the calibration simulation area approximates a Gaussian distribution, and the histogram is as follows Figure 4 shown. The average value of RCS in the calibration simulation area is -17.33dB.
[0168] Table 1 Echo simulation parameters
[0169]
[0170] By adding a scaler with a known radar cross-sectional area at the center of the s...
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