FY-2自旋稳定气象卫星动态月球观测与图像配准
|
摘要
为满足基于月球辐射校正的内黑体绝对辐射定标对月球观测数据的需求,设计了FY-2卫星的动态月球观测模式,在新的工作模式下观测到了高质量的月球图像。为获取高质量的月球图像,根据FY-2卫星自旋稳定平台的特点,以及灵活的观域调整和区域扫描功能,重新设计了卫星工作时序,并更改了卫星地面控制系统软件,在卫星常规20°×20°视场外,拓展出了10°×20°的月球观测区域,实现了月球的动态追踪观测,实践证明,观测模型精度优于30 s;根据月球图像特点,设计了伪目标剔除算法,通过对目标位置、形态特性等条件自动判断实现了从卫星云图中自动、准确提取出月球图像的功能;根据月球在卫星视场里的动目标特性,以FY-2卫星自旋扫描成像的工作原理和具体的性能参数,计算得到了动目标的相对角速度,据此发展了动目标配准算法、消除了月球运动造成的变形和位移,实现了月球图像配准。工作获得了常规观测3倍数量的月球图像,有力地保障了FY-2卫星辐射定标性能,促进了遥感数据定量化应用。
Calibration of inner blackbody corrected by lunar emission( CIBLE) is developed,the moon emission is stability and is used to correct system error,so the moon image is very important to CIBLE. A new scanning model of FY-2 for moon's remote sensing comes true,many high quality moon images have been got. The new scanning model is based on the character of spin stabilization of satellite and flexible segmental scanning model,a new software for generating new orders takes part in the controlling system of satellite,besides traditional 20° ×20° field of view,a new 10° ×20° field of view is developed,the precession of the model is less than 30 seconds. An image process algorithm recognize automatic picking the moon image from the whole full disk image,the algorithm removes the false targets and noise based on the moon's size and emission character. The moon registration algorithm is designed because the moon is mobile in the field of the FY-2 satellite,the angle speed is calculated out based on the characters of the satellite,by which the position error is corrected. After the beginning of the work,more than three times moon images of conditional remote sensing have been got,which accelerates the usage of CIBLE.
Calibration of inner blackbody corrected by lunar emission( CIBLE) is developed,the moon emission is stability and is used to correct system error,so the moon image is very important to CIBLE. A new scanning model of FY-2 for moon's remote sensing comes true,many high quality moon images have been got. The new scanning model is based on the character of spin stabilization of satellite and flexible segmental scanning model,a new software for generating new orders takes part in the controlling system of satellite,besides traditional 20° ×20° field of view,a new 10° ×20° field of view is developed,the precession of the model is less than 30 seconds. An image process algorithm recognize automatic picking the moon image from the whole full disk image,the algorithm removes the false targets and noise based on the moon's size and emission character. The moon registration algorithm is designed because the moon is mobile in the field of the FY-2 satellite,the angle speed is calculated out based on the characters of the satellite,by which the position error is corrected. After the beginning of the work,more than three times moon images of conditional remote sensing have been got,which accelerates the usage of CIBLE.
引文
[1]郭强,陈博洋,杨昌军,等.风云二号水汽波段在轨辐射定标新方法[J].红外与毫米波学报,2012,32(6):523-527.
[2]郭强,陈博洋,张勇,等.风云二号卫星在轨辐射定标技术进展[J].气象科技进展,2013,3(6):6-12.
[3]邸凯昌,刘斌,刘召芹,等.月球遥感制图回顾与展望[J].遥感学报,2016,20(5):1230-1242.
[4]刘建军,任鑫,王奋飞,等.月球光学遥感与制图研究进展[J].矿物岩石地球化学通报,2015,34(3):461-470.
[5]曹志宇.FY-2卫星云图成像基准与模拟遥测关系的分析[J].上海航天,2000,27(5):42-46.
[6]韩琦,魏彩英,张晓虎,等.FY-2区域观测模式下姿态计算特征参数结算[J].红外与毫米波学报,2014,33(2):188-191.
[7]Alexander Wong,David A Clausi.Automatic Registration of RemoteSensing Images[J].IEEE Transactions on Ceoscience and Remote Sensing.2007,45(5):1483-1493.
[8]Feng Lu.Image Navigation for the FY2 Geosynchronous Meteorological Satellite[J].Journal of Atmospheric and Oceanic Technology,2008,25(7):1149-1164.
[9]白光耀,王昊,王志远,等.面向微小卫星的全视场数字太阳敏感期设计[J].传感技术学报,2016,29(2):232-236.
[10]陆风,许健民,张其松.风云二号气象卫星姿态和沿步进方向失配角参数对图像影响的模拟研究[J].应用气象学报,2001,12(4):393-399.
[11]欧阳自远.月球科学概论[M].北京:中国宇航出版社,2005.
[12]陈博洋,李欣耀,郭强,等.FY-2E卫星杂散光评价与分析[J].红外技术,2010,32(11):636-639,644.
[13]袁泽,丁建丽,王娇,等.基于国产GF-1遥感影像的面向对象桥梁提取方法研究[J].传感技术学报,2015,28(5):690-695.
[14]K.N.LIOU著.郭彩丽,周诗健,译.大气辐射导论[M].第2版.气象出版社:10-12.
[15]王先全,雷毅谈,张虹光,等.基于DSP的时栅位移传感器误差在线处理与系统设计[J].传感技术学报,2014,27(8):1054-1059.
[2]郭强,陈博洋,张勇,等.风云二号卫星在轨辐射定标技术进展[J].气象科技进展,2013,3(6):6-12.
[3]邸凯昌,刘斌,刘召芹,等.月球遥感制图回顾与展望[J].遥感学报,2016,20(5):1230-1242.
[4]刘建军,任鑫,王奋飞,等.月球光学遥感与制图研究进展[J].矿物岩石地球化学通报,2015,34(3):461-470.
[5]曹志宇.FY-2卫星云图成像基准与模拟遥测关系的分析[J].上海航天,2000,27(5):42-46.
[6]韩琦,魏彩英,张晓虎,等.FY-2区域观测模式下姿态计算特征参数结算[J].红外与毫米波学报,2014,33(2):188-191.
[7]Alexander Wong,David A Clausi.Automatic Registration of RemoteSensing Images[J].IEEE Transactions on Ceoscience and Remote Sensing.2007,45(5):1483-1493.
[8]Feng Lu.Image Navigation for the FY2 Geosynchronous Meteorological Satellite[J].Journal of Atmospheric and Oceanic Technology,2008,25(7):1149-1164.
[9]白光耀,王昊,王志远,等.面向微小卫星的全视场数字太阳敏感期设计[J].传感技术学报,2016,29(2):232-236.
[10]陆风,许健民,张其松.风云二号气象卫星姿态和沿步进方向失配角参数对图像影响的模拟研究[J].应用气象学报,2001,12(4):393-399.
[11]欧阳自远.月球科学概论[M].北京:中国宇航出版社,2005.
[12]陈博洋,李欣耀,郭强,等.FY-2E卫星杂散光评价与分析[J].红外技术,2010,32(11):636-639,644.
[13]袁泽,丁建丽,王娇,等.基于国产GF-1遥感影像的面向对象桥梁提取方法研究[J].传感技术学报,2015,28(5):690-695.
[14]K.N.LIOU著.郭彩丽,周诗健,译.大气辐射导论[M].第2版.气象出版社:10-12.
[15]王先全,雷毅谈,张虹光,等.基于DSP的时栅位移传感器误差在线处理与系统设计[J].传感技术学报,2014,27(8):1054-1059.