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创建了地球场景数据集, 结合全极化微波辐射传输模型, 仿真了地球场景亮温. 基于自主推导的全极化天线温度方程, 通过GRASP9软件生成天线方向图, 模拟了辐射计的天线温度. 进而利用多元线性回归方法, 求取了天线交叉极化校正M矩阵, 实现了对星载极化相关型全极化微波辐射计天线交叉极化的校正. 试验结果表明: 天线温度与地球场景亮温之间具有良好的线性关系; 天线交叉极化对全极化微波辐射计正交通道亮温影响明显, 尤其以对垂直极化亮温误差的影响最为显著; 校正后各通道的天线交叉极化得到了有效的减小, 交叉极化优于-23 dB, 极化纯度大于99.5%, 采用M矩阵校正及消除天线温度中交叉极化亮温影响的方案是切实可行的. 该校正技术可以实现星载极化相关型全极化微波辐射计在轨运行后对于天线交叉极化的最终校正.In this paper, we simulated the earth scene brightness temperature by creating the earth scene data sets and using polarimetric microwave radiative transfer model. On the basis of the fully polarized antenna temperature equation we have derived, the radiometer antenna temperature was also simulated by generating antenna pattern through GRASP9 software. Then by using multiple linear regression method, the M matrix was calculated and the antenna cross-polarization correction for spaceborne polarimetric microwave correlation radiometer was realized. The correction results show that the antenna temperature and earth scene brightness temperature have a linear relationship. Antenna cross-polarization influences the orthogonal channels brightness temperature seriously, especially the vertical polarization brightness temperature. The antenna cross-polarization for each channel has been effectively reduced. Residual cross-polarization is better than -23 dB and the polarization purity is greater than 99.5%. Correction of using M matrix to eliminate the antenna cross-polarization is feasible. It has been proved that this technique is most appropriate for the final correction of antenna cross-polarization for the spaceborne polarimetric microwave correlation radiometer on orbit.
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Keywords:
- polarimetric microwave radiometer /
- antenna cross-polarization /
- antenna temperature equation /
- M-matrix
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[2] Martine S 2004 An introduction to ocean remote sensing (Cambridge: Cambridge University Press) pp201-27
[3] Gaiser P W, Twarog E M, Karen L L 2004 IEEE Trans. Geosci. Remote Sens. 42 2347
[4] Plonski M, Smith C 2001 Algorithm theoretical basis document (ATBD) for the conical-scanning microwave imager/sounder (CMIS) environmental data records (EDRs) (Vol.1 17) (Lexington: AER) pp1-132
[5] Hewison T J, Saunder R 1996 IEEE Trans. Geosci. Remote Sens. 34 405
[6] Janssen M A, Ruf C S, Keihm S 1995 IEEE Trans. Geosci. Remote Sens. 33 138
[7] Smith C K, Thompson D 2008 IGARSS Boston, MA, July 6-11, 2008 p10
[8] Lu W, Yan W, Wang R, Wang Y Q 2012 Acta Phys. Sin. 61 018401 (in Chinese) [陆文, 严卫, 王蕊, 王迎强 2012 61 018401]
[9] Kim S B, Wentz F J 2008 IGARSS Boston, MA, July 6-11, 2008 pp1184-1187
[10] Zhang Z Y, Lin S J 1995 Microwave radiation measurement technology and Application (Beijing: Electronic Industry Press) (in Chinese) [张祖荫, 林士杰 1995 微波辐射测量技术与应用 (北京: 电子工业出版社) ]
[11] Njoku Eni G, Christensen E J, Cofield R E 1980 IEEE J. Oceanic Eng. 5 125
[12] Wentz F J 1993 User's Manual SSM/I Antenna Temperature Tapes Revision 2 (Santa Rosa: Remote Sensing System) pp7–15
[13] Tachi K, Arai K, Sato Y 1989 IEEE Trans. Geosci. Remote Sens. 27 177
[14] Gaiser P, Purdy B 2002 Antenna design, modeling, and testing on the WindSat satellite wind direction measurement system (Washington: Naval Research Laboratory) pp39-43
[15] Shi J K, Lu W, Yan W, Ai W H 2012 Acta Phys. Sin. 61 078403 (in Chinese) [施健康, 陆文, 严卫, 艾未华 2012 61 078403]
[16] Pontoppidan K 2005 GRASP9 technical description (Denmark: TICRA Engineering Consultants) pp1-11
[17] Wang R 2007 MS Thesis (Nanjing: Institute of Meteorology, PLA University of Science & Technology) (in Chinese) [王蕊 2007 硕士学位论文 (南京: 解放军理工大学气象学院)]
[18] Wang Z Z 2005 Ph. D. Dissertation (Beijing: Center for Space Science and Applied Research, Chinese Academy of Sciences) (in Chinese) [王振占 2005 博士学位论文 (北京: 中国科学院空间科学与应用研究中心)]
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[1] Ulaby F T, Moore R K, Fung A K 1981 Microwave remote sensing: active and passive (Vol. 1) (Massachusetts: Addison-Wesley Publishing Company) pp229-85
[2] Martine S 2004 An introduction to ocean remote sensing (Cambridge: Cambridge University Press) pp201-27
[3] Gaiser P W, Twarog E M, Karen L L 2004 IEEE Trans. Geosci. Remote Sens. 42 2347
[4] Plonski M, Smith C 2001 Algorithm theoretical basis document (ATBD) for the conical-scanning microwave imager/sounder (CMIS) environmental data records (EDRs) (Vol.1 17) (Lexington: AER) pp1-132
[5] Hewison T J, Saunder R 1996 IEEE Trans. Geosci. Remote Sens. 34 405
[6] Janssen M A, Ruf C S, Keihm S 1995 IEEE Trans. Geosci. Remote Sens. 33 138
[7] Smith C K, Thompson D 2008 IGARSS Boston, MA, July 6-11, 2008 p10
[8] Lu W, Yan W, Wang R, Wang Y Q 2012 Acta Phys. Sin. 61 018401 (in Chinese) [陆文, 严卫, 王蕊, 王迎强 2012 61 018401]
[9] Kim S B, Wentz F J 2008 IGARSS Boston, MA, July 6-11, 2008 pp1184-1187
[10] Zhang Z Y, Lin S J 1995 Microwave radiation measurement technology and Application (Beijing: Electronic Industry Press) (in Chinese) [张祖荫, 林士杰 1995 微波辐射测量技术与应用 (北京: 电子工业出版社) ]
[11] Njoku Eni G, Christensen E J, Cofield R E 1980 IEEE J. Oceanic Eng. 5 125
[12] Wentz F J 1993 User's Manual SSM/I Antenna Temperature Tapes Revision 2 (Santa Rosa: Remote Sensing System) pp7–15
[13] Tachi K, Arai K, Sato Y 1989 IEEE Trans. Geosci. Remote Sens. 27 177
[14] Gaiser P, Purdy B 2002 Antenna design, modeling, and testing on the WindSat satellite wind direction measurement system (Washington: Naval Research Laboratory) pp39-43
[15] Shi J K, Lu W, Yan W, Ai W H 2012 Acta Phys. Sin. 61 078403 (in Chinese) [施健康, 陆文, 严卫, 艾未华 2012 61 078403]
[16] Pontoppidan K 2005 GRASP9 technical description (Denmark: TICRA Engineering Consultants) pp1-11
[17] Wang R 2007 MS Thesis (Nanjing: Institute of Meteorology, PLA University of Science & Technology) (in Chinese) [王蕊 2007 硕士学位论文 (南京: 解放军理工大学气象学院)]
[18] Wang Z Z 2005 Ph. D. Dissertation (Beijing: Center for Space Science and Applied Research, Chinese Academy of Sciences) (in Chinese) [王振占 2005 博士学位论文 (北京: 中国科学院空间科学与应用研究中心)]
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