摘要
使用４３７９２个ＭＡＧＳＡＴ卫星磁测数据，编绘青藏高原及其邻近地区卫星标量（△Ｆ）和矢量（△Ｘ，△Ｙ，△Ｚ）磁异常图（１５°Ｎ－５０°Ｎ，７０°Ｅ－１１０°Ｅ）。为了提取岩石层卫星磁异常，首先对ＭＡＧＳＡＴ卫星数据进行了筛选，然后进行主磁场、磁层场、电离层场和感应场改正，并消除虚假测点。把卫星数据分成黎明组、黄昏组和联合组，分别绘制相应的卫星磁异常图，根据１°×１°的网点值，用计算机编绘卫星磁异常图，等值线间隔为１ｎＴ。图上显示出一对明显的异常，即亚洲最著名的青藏高原负异常和塔里木正异常。
Based on more than forty thousands MAGSAT data, the scalar and vector magnetic anomaly maps for Qinghai-Xizang(Tibetan) plateau and its adjacent region are produced. In or der to extract the lithospheric magnetic anomalies, the MAGSAT data were selected, the main magnetic field,magnetospheric, ionospheric and induction fields were corrected, and some unreal istic observed data were deleted. MAGSAT data were divided into dawn data set (6hLT),dusk da ta set(18hLT). dawn and dusk combined data set. The region studied is divided into cells,the size of cell is one degree in latitude and longitude. The value of the lithospheric magnetic anoma lies at the center of each cell is taken as the mean value of the data falling into the cell. According to the grid point values, the contour maps are produced.They include:1.The △X,△Y,△Zand △F magnetic anomaly maps derived from dawn data set only. 2. The △X,△Y,△Z and△F magnetic anomaly maps derived from dusk data set only. 3. The △X,△Y,△Z and △F magnetic anomaly maps derived using dawn and dusk combined data set. The contour interval is ln T. The MAGSAT magnetic anomaly maps show strong positive anomaly over the Tarim basin, and a strong negative anomaly over the Qinghai-Xizang(Tibet) plateau
出处
《测绘学报》
EI
CSCD
北大核心
1996年第3期221-225,共5页
Acta Geodaetica et Cartographica Sinica
基金
中国科学院测量与地球物理研究所动力大地测量学开放研究实验室资助
关键词
MAGSAT卫星
青藏高原
磁异常
地磁场
测量数据
MAGSAT satellite, Satellite magnetic anomaly map, Qinghai-Xizang(Tibetan)plateau
