收稿：2017-05-05，
录用：2017-9-19，
纸质出版：2018-05
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针对大气延迟时变误差影响遥感卫星十三号(YG-13A)斜距标定精度的问题，提出利用顾及大气延迟时变误差的斜距标定方法提高其斜距标定精度的策略。首先，利用基于NCEP气象资料和全球TEC数据的大气延迟改正方法来计算各标定景的大气延迟改正量。其次，将各标定景的大气延迟改正量代入斜距标定模型中。最后，在地面布设高精度角反射器控制点的情况下通过顾及大气延迟时变误差的斜距标定模型求解斜距测量系统误差
从而提高和验证斜距测量精度，角反射器控制点的平面和高程精度均优于0.1 m。利用嵩山遥感定标场地区的4组不同拍摄模式下获得的YG-13A卫星影像数据对比试验表明，相较于传统的斜距定标方法，在顾及大气延迟时变误差的情况下，4组数据的斜距改正值离散度均有所下降。利用太原、天津两个区域3景影像验证斜距改正后的精度，最小值为0.55 m，最大值为0.91 m，均值为0.70 m。试验结果证明了顾及大气延迟时变误差的斜距标定方法的有效性和可行性。
The Chinese YG-13A mission was launched in November 2015. YG-13A is equipped with a next-generation high-resolution Synthetic Aperture Radar (SAR) sensor in the X-band
with a resolution of up to 0.5 m. China can now obtain high-resolution SAR images globally. YG-13A demonstrates several improvements compared with previous Chinese SAR satellites
and these improvements include (1) higher image resolution due to a new sliding-spot imaging mode; (2) more flexible data acquisition owing to the capability to image the left and right sides; and (3) improvement in the measuring accuracy of instruments. When the radar system is operating
the radar signal travels through the medium between the antenna and ground. The radar signal encounters group delay in the ionosphere and troposphere (atmospheric path delay) because the refractive index of the atmosphere is not uniform. The range accuracy of YG-13A is thus influenced by atmospheric delay time-varying errors. To address the range accuracy problem of YG-13A
a range calibration method that considers atmospheric delay time-varying errors is proposed to improve range accuracy. First
the atmospheric delay correction method using external data is selected to calculate the atmospheric delay correction amount for each calibration scene. Second
the atmospheric delay corrections for each calibration scene are substituted into the range calibration model. Finally
the system error of range measurement is solved with the range calibration model that considers the atmospheric delay time-varying error when a high-precision corner reflector control point is laid on the ground. The plane and elevation precision of the corner reflector control point are better than 0.1 m. When atmospheric path delay is considered
the standard deviation of the slant range calibration values of four sets of data
namely
A1
A2
B1
and B2
is small. Images obtained over Taiyuan and Tianjin test sites show that the range accuracy of YG-13A is approximately 0.70 m in consideration of the atmospheric delay time-varying error. Calibration results show that the method is effective and feasible. The 0.3 m orbital nominal accuracy is close to the theoretical limit. The range accuracy of YG-13A is mainly limited by the orbit accuracy determined by a single-frequency global positioning satellite. The findings prove that the range measurement of SAR does not use the attitude parameter and can achieve high precision.
Bräutigam B, Schwerdt M and Bachmann M. 2006. The external calibration of TerraSAR-X, a multiple mode SARSystem//Proceedings of the 6th European Conference on Synthetic Aperture Radar. Dresden, Germany: VDE
Chao C C. 1974. The Tropospheric Calibration Model for MARINER MArs 1971. Technical Report 32–1587. Pasadena, California: JPL: 61–76.
陈钦明, 宋淑丽, 朱文耀. 2012. 亚洲地区ECMWF/NCEP资料计算ZTD的精度分析. 地球物理学报, 55(5): 1541–1548
Chen Q M, Song S L and Zhu W Y. 2012. An analysis of the accuracy of zenith tropospheric delay calculated from ECMWF/NCEP data over Asian area. Chinese Journal of Geophysics, 55(5): 1541–1548 (
Cumming I G, Wong F H. 2007. 合成孔径雷达成像——算法与实现. 洪文, 胡东辉, 译. 北京: 电子工业出版社
Cumming I G and Wong F H. 2007. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation. Hong W and Hu D H, trans. Beijing: Electronic Industries Press: 155–191
Davis J L, Herring T A, Shapiro I I, Rogers A E E and Elgered G. 1985. Geodesy by radio interferometry: effects of atmospheric modeling errors on estimates of baseline length. Radio Science, 20(6): 1593–1607
Doin M P, Lasserre C, Peltzer G, Cavalié O and Doubre C. 2009. Corrections of stratified tropospheric delays in SAR interferometry: validation with global atmospheric models. Journal of Applied Geophysics, 69(1): 35–50
Eineder M, Minet C, Steigenberger P, Cong X Y and Fritz T. 2011. Imaging geodesy—toward centimeter-level ranging accuracy with TerraSAR-X. IEEE Transactions on Geoscience and Remote Sensing, 49(2): 661–671
费文波. 2012. RPC模型在星载SAR与星载InSAR几何处理中的研究与应用. 武汉: 武汉大学: 20–22
Fei W B. 2012. Research and Application of the RPC Model Geometry Processing for Spaceborne SAR and Spaceborne InSAR. Wuhan: Wuhan University: 20–22
Herring T A and Quinn K. 2001. Atmospheric Delay Correction to GLAS Laser Altimeter Ranges. http://www.csr.utexas.edu/glas/atbd-tropo.pdf http://www.csr.utexas.edu/glas/atbd-tropo.pdf
Jehle M, Perler D, Small D, Schubert A and Meier E. 2008. Estimation of atmospheric path delays in TerraSAR-X data using models vs. measurements. Sensors (Basel), 8(12): 8479–8491
李松, 肖建明, 马跃, 周辉, 郭想. 2013. 星载激光测高系统的大气折射延迟改正模型研究. 光学与光电技术, 11(1): 7–11
Li S, Xiao J M, Ma Y, Zhou H and Guo X. 2013. Study on atmospheric refraction delay correction for satellite laser altimeter system. Optics and Optoelectronic Technology, 11(1): 7–11 (
Li S N, Zhang G, Tang X M and Huang W C. 2016. A method for detecting the atmospheric refraction effect using satellite remote sensing. Remote Sensing Letters, 7(10): 985–993
刘秀芳, 刘佳音, 洪文. 2006. 星载SAR图像的定位精度分析研究. 遥感学报, 10(1): 76–81
Liu X F, Liu J Y and Hong W. 2006. The analysis of the precision in spaceborne SAR image location. Journal of Remote Sensing, 10(1): 76–81 (
Marini J W. 1972. Correction of satellite tracking data for an arbitrary tropospheric profile. Radio Science, 7(2): 223–231
Mittermayer J, Younis M, Metzig R, Wollstadt S, Martinez J M and Meta A. 2010. TerraSAR-X System performance characterization and verification. IEEE Transactions on Geoscience and Remote Sensing, 48(2): 660–676
Mohr J J and Madsen S N. 2001. Geometric calibration of ERS satellite SAR images. IEEE Transactions on Geoscience and Remote Sensing, 39(4): 842–850
Nitti O D, Bovenga F, Nutricato R, Refice A, Bruno M F, Petrillo A F and Chiaradia M T. 2013. On the use of numerical weather models for improving SAR geolocation accuracy//Proceedings of the 10th European Conference on Synthetic Aperture Radar. Berlin, Germany: IEEE: 1–4
Noerdlinger P D. 1999. Atmospheric refraction effects in earth remote sensing. ISPRS Journal of Photogrammetry and Remote Sensing, 54(5/6): 360–373
Schubert A, Jehle M, Small D and Meier E. 2010. Influence of atmospheric path delay on the absolute geolocation accuracy of TerraSAR-X high-resolution products. IEEE Transactions on Geoscience and Remote Sensing, 48(2): 751–758
Schwerdt M, Schmidt K, Ramon N T, Alfonzo G C, Döring B J, Zink M and Prats-Iraola P. 2016. Independent verification of the sentinel-1A system calibration. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 9(3): 994–1007
王纯, 张捍卫. 2009. 大气折射延迟映射函数的比较. 地理空间信息, 7(6): 85–87
Wang C and Zhang H W. 2009. Comparison of atmospheric refraction delay mapping function. Geospatial Information, 7(6): 85–87 (
Wang X W, Cheng X, Gong P, Huang H B, Li Z and Li X W. 2011. Earth science applications of ICESat/GLAS: a review. International Journal of Remote Sensing, 32(23): 8837–8864
魏钟铨. 2001. 合成孔径雷达卫星. 北京: 科学出版社: 17–22
Wei Z Q. 2001. Synthetic Aperture Radar Satellite. Beijing: Science Press: 17–22
赵欣, 张毅, 赵平建, 涂碧海. 2011. 星载激光测高仪大气传输延迟对测距精度的影响. 红外与激光工程, 40(3): 438–442
Zhao X, Zhang Y, Zhao P J and Tu B H. 2011. Influence of atmospheric transmission delay of satellite laser altimeter on ranging precision. Infrared and Laser Engineering, 40(3): 438–442 (
朱陶业, 朱建军, 张学庄, 郭云开. 2007. 大气折射的映射函数与神经网络拟合比较分析. 测绘学报, 36(3): 290–295
Zhu T Y, Zhu J J, Zhang X Z and Guo Y K. 2007. Atmospheric refraction numerical fitting research based on mapping function and neural network. Acta Geodaetica et Cartographica Sinica, 36(3): 290–295 (
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