卫星轨道力学模型分析

本文分析了目前卫星定轨中采用的轨道力学模型误差状况。使用Ｌａ－ｇｅｏｓ卫星的全球激光测距资料，利用长短弧定轨比较方法，给出了力学模型误差对此卫星的影响特性，并对所采用的力模型进行定性、定量分析。结果表明，卫星长弧定轨误差源来自于力学背景尚不十分清楚的因素。     

卫星遥感系统中的政区信息拓扑

根据基层台站开展气象卫星监测作物长势等遥感业务的需要，给出了应用普通微机管理政区信息的拓扑方法。     

Representativeness of total ozone trends as derived from satellite BUV and ground-based measurements

The information content of the 7-year BUV data set has been reexamined by a comparison with a fairly large set of ground Dobson and M-83 instruments. The satellite-ground intercomparison of total ozone was done under different types of ground observation techniques (observation code) and different instrument exposure (exposure code) and for various distances of the subsatellite point from the station. Because of the existing latitudinal gradient in total ozone, at a given station the bias ground-BUV tends to be smaller when the subsatellite point is at a latitude higher than the station's latitude. Knowing the total ozone gradient at a given station, the BUV total ozone has been corrected to account for the ozone gradient and the correlation was calculated with the corresponding ground observations. These correlations seem to offer no improvement when compared with the correlations between the ground ozone and the actual BUV ozone at distances of the subsatellite point from the station within 200 km from the station used in previous studies. The seasonal variation of the BUV-ground correlation reveals information on the noise level of the measurements and the geographical distribution of the percentage mean bias: (Ground-BUV)×100/(Ground) is discussed. Both on short and on longer time scales it appears that the BUV derived recommended total ozone data set is reasonably good and possible instrumental drifts are not large. The analysis includes an extension through April 1977 of the BUV and contour-derived total ozone trends byLondon andLing (1980). Over the northern hemisphere both data sets (contour and BUV) show comparable trends over middle and high latitudes which range from –3 D.U./year to –5 D.U./year during the 7-year period April 1970–April 1977. In the southern hemisphere, however, long-term variation in total ozone cannot be determined from ground observations alone. It is concluded that for unknown reasons during the 7-year period of study, total ozone has been decreasing over most of the globe. The negative growth rates at high latitudes of the northern hemisphere are highly significant.     

利用卫星云图作广西强降水短时预报

构造天气学意义明确的卫星云图状态函数模型，在对云层进行分类的基础上，定量提取卫星云图参数，通过与云图模板的相似运算寻找短时预报指标。试报结果表明，这种方法对提高强降雨落区的短时预报准确率是可行的。     

A MASCOTTE-based characterization of MCSs over Spain, 2000–2002

A 3-year Mesoscale Convective Systems (MCSs) database, which extends from 2000 to 2002, has been built for the Iberian Peninsula and the Balearic Islands using the objective method MASCOTTE (MAximum Spatial COrrelation Technique). It was originally developed to track the evolution of convective systems over the Amazon region; after modifications, it is able to track MCS evolution even with an hour and a half of missed images and provides essential information of both dynamical and morphological characteristics of MCSs. MASCOTTE is tested against a visual and subjective method, and is found to offer advantages such as automation and a simple and efficient operation that make it very useful for building large MCS databases.Thirty-five MCSs were found between June and October, most of them originated along the Mediterranean coast and near the Pyrenees, showing an increasing occurrence from June to September, when the maximum is found. The regions most influenced by MCS occurrences are Balearic Islands, Valencia, Catalonia, Murcia and the Basque Country. The MCSs tend to be small, short-lived and linear, usually moving eastward or northeastward with low velocities.The MCSs-associated precipitation presents high variability, ranging from 80 to 0 mm h⁻¹ as maximum hourly records. Two different convective regions are identified based on MCS behavior in extreme precipitation events: Northern Spain (the Basque Country) with abundant and continuous precipitation regime but little MCS influence, and the Mediterranean coast, where precipitation is sporadic but much more intense.     

一次MCS过程的卫星云图和数值模拟分析

本文应用卫星云图与数值模拟结果对2000年6月2日发生的一次影响江苏的江淮气旋暴雨过程进行研究分析，阐述了这次暴雨过程表现的MCS基本特征。分析表明：MCS的形成可以由几个中β尺度对流云或对流带开始，在特定的环境场中汇合成合并；在其发展过程中必须维持湿度平流，低层到中层有暖平流，骨强偏南风急流伸向形成区，同时在其东北方向有一支高空西风急流相耦合；低层的辐合、整层凝结潜热的释放、垂直运动的增强、高层的辐散引起的正反馈机制是MCS发展的动因。     

云顶充满度的特征分析

本文采用GMS－5红外云母，提取了一个描述云顶结构特征的参数一云顶充满度VS。结合地面观测资料，引入了云高参数DTS，得到并分析了参数VS随云高DTS的分布特征，同时还讨论了VS的天气学意义。     

中规模卫星云图接收系统故障排除及产品处理

针对中规模卫星云图接收系统在接收过程中常见的几种错误，本文分析了问题的发生原因，并详细演示了应对办法。最后讨论了web格式产品的制作和分发。     

由空间直角坐标计算大地坐标的简便公式

对大地测量教科书中给出的空间三维直角坐标与大地坐标的转换公式进行了大量的计算与分析，总结得出一组由空间直角坐标计算大地坐标的简便公式。     

卫星遥感影像中耕地信息的自动提取方法研究

以县（市区）为基本单位，采用遥感图像处理ENVI3.2软件和TM资料，进行了7个县（市区）10个时相的耕地信息自动提取技术研究，结果证明，选择春季时相，TM432波段合成，经几何校正和增强处理，通过交互的非监督分类提取耕地信息，可以获得满意的结果，平均分类精度达到98.22%。