Hao ShengYong, Wang XiaoQing, Cheng XinQing, Zhu MinHui. A Means of Improving Accuracy of Positioing for Ocean SAR[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1213-1216.
Citation:
Hao ShengYong, Wang XiaoQing, Cheng XinQing, Zhu MinHui. A Means of Improving Accuracy of Positioing for Ocean SAR[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1213-1216.
Hao ShengYong, Wang XiaoQing, Cheng XinQing, Zhu MinHui. A Means of Improving Accuracy of Positioing for Ocean SAR[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1213-1216.
Citation:
Hao ShengYong, Wang XiaoQing, Cheng XinQing, Zhu MinHui. A Means of Improving Accuracy of Positioing for Ocean SAR[J]. Journal of Electronics & Information Technology, 2005, 27(8): 1213-1216.
Estimation of Doppler central frequency has an important effect to accuracy of fixed position in the fixing approach with no reference points for ocean SAR. The effect of Signal-Noise-Ration （SNR） to the estimation of Doppler central frequency has been studied using theoretical method and simulation technique, and results are given in curves. Based on above results, a Doppler measurement mode is adopted in the design of ocean SAR. Compared to common imaging mode, this mode increases SNR of ocean echo by decreasing the bandwidth, then accuracy of fixed position can be improved.
Curlander J C. Location of pixels in spaceborne SAR imagery.IEEE Trans. on GE, 1982, 29(3): 359 - 364.[2]Papoulis A. Probability, Random Variables, and Stochastic Processes. New York: McGraw-Hill, 1965.[3]Li F K, Held D N, Curlander J C. Doppler parameter estimation for synthetic aperture Radar. IEEE Trans. on GE, 1985, 23(1):47 - 56.[4]Madsen S N. Estimating the Doppler centriod of SAR data. IEEE Trans. onAES, 1989, 25(2): 134- 140.[5]Bamler R. Doppler frequency estimation and the Cramer_Rao bound. IEEE on Trans. GE, 1991, 29(3): 385 - 390.[6]禹卫东.合成孔径雷达信号处理研究.[博士论文],南京:南京航空航天大学,1997年.
DownLoad: