ANALYSIS OF THE IMAGE QUALITY OF NO GROUND CONTROLLED POSITIONING PRECISION ABOUT SURVEYING AND MAPPING SATELLITE
- 1Chang’an University, 710054 Xi’an, China
- 2Xi’an Institute of surveying and mapping, 710054 Xi’an, China
- 3Xi’an Zhong Ke Xing Tu Space Date Technology Co., Ltd, 710100 Xi’an, China
Keywords: Positioning accuracy, Modulation Transfer Function, Signal to Noise Ratio, Quantization Bits, degradation data
Abstract. The image quality of the surveying camera will affect the stereoscopic positioning accuracy of the remote sensing satellite. The key factors closely related to the image quality are Modulation Transfer Function(MTF),Signal to Noise Ratio(SNR) and Quantization Bits(QB). In “Mapping Satellite-1” image as the background, research the effect of positioning precision about the image quality in no ground controlled conditions, and evaluate the quantitative relationship with the positioning precision. At last verify the validity of the experimental results by simulating three factors of the degraded data on orbit, and counting the number of matching points, the mismatch rate, and the matching residuals of the degraded data. The reason for the variety of the positioning precision was analyzed.