Abstract: The use of dither scan to augment gain and offset compensation is an efficient method of minimizing the fixed pattern effects occurring in a staring array. Since the process requires multiple samples to effect cancellation, the performance of the process is dependent on the stability of the line of sight over the collection interval. Both additive noise and jitter on the line of sight contribute to errors in the reconstruction of the pattern from dither scan samples. In order to suppress the 1/f noise component which occurs due to accumulated noise errors during reconstruction, a complementary filter is employed which provides low spatial frequency data from the original image and high spatial frequency data from the dither scan image. The residual noise produced by line of sight jitter errors is proportional to the input signal level and the jitter modulation level. This paper presents some Monte Carlo simulation results and methods to reduce the effects of jitter.!1
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