Finally, we can obtain the smallest macro-pixel and the restricted operation for determining the target of macro-pixel. For earth image of 512 pixels×512 pixels, the target is about 16×16 pixels in size. The most macropixels is 36 pixels and target macro-pixel is Lacoste Shirts enlarged by 2 pixels. The value of r is 1 when SNR is 5dB. To get the precise location of earth target, we have chi hair straightener adopted chi flat iron and the maximum likelihood estimation. This method calculates the translation of earth beacon signals, so a nonlinear equation is needed solving. The linearly approximated result shows that the total translation error is below 0.5 pixel. The translation error in polo shirts direction is 3.2% and in Y direction is 2.75%. When SNR(Signal Noise Ratio) is 1 and the size of beacon image is closer to reference image, the center position of beacon image calculated are almost the same as the actual ones of beacon image.The experimental results show that the maximum error is 0.115urad by applying chi flat iron and the relevant macro-pixel of maximum likelihood estimation, and that it can completely meet the need of acquisition.
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