海洋测深网平差的系统误差探测能力

定义了反映海洋测深网系统误差探测能力的系统误差分辨率;构建了系统误差分辨率与测深网结构及测区深度的数学关系.在此基础上,分析了我国海道测量规范要求下的测线系统误差探测能力与图幅及测深指标的关系.建议检/测长度比提高到10%～15%,以增强测深网探测系统误差的能力.最后海区试验表明,适当的检查线数有助于探测更小的系统误差.     

测深拼接的组网平差判定方法

从网平差角度研究两相邻图幅的重叠测线间拼接问题，提出3种组网平差模型和图幅间系统误差的判定方法，并通过实例计算比较了组网平差判定法和常用的重叠线直接比对法，计算结果表明，组网平差判定法克服了常用的直接比对法对重叠测线依赖，能有效准确地判定图幅间的系统差异，为测深网拼接提供了更为实用的方法。     

NUMERICAL SIMULATIONS OF EFFECTS OF LAND SURFACE PROCESSES ON CLIMATE——IMPLEMENTING OF SSiB IN IAP/LASG AGCM AND ITS PERFORMANCE

This is an investigation of exchanges of energy and water between the atmosphere and thevegetated continents,and the impact of and mechanisms for land surface-atmosphere interactionson hydrological cycle and general circulation by implementing the Simplified Simple Biosphere(SSiB)model in a modified version of IAP/LASG global spectral general model(L9R15 AGCM).This study reveals that the SSiB model produces a better partitioning of the land surface heat andmoisture fluxes and its diurnal variations,and also gives the transport of energy and water amongatmosphere,vegetation and soil explicitly and realistically.Thus the coupled SSiB-AGCM runslead to the more conspicuous improvement in the simulated circulation,precipitation,mean watervapor content and its transport.particularly in the Asian monsoon region in the real world thanCTL-AGCM runs.It is also pointed out that both the implementation of land surfaceparameterizations and the variations in land surface into the GOALS model have greatly improvedhydrological balance over continents and have a significant impact on the simulated climate.particularly over the massive continents.Improved precipitation recycling model was employed to verify the mechanisms for landsurface hydrology parameterizations on hydrological cycle and precipitation climatology in AGCM.It can be argued that the recycling precipitation rate is significantly reduced,particularly in the aridand semi-arid region of the boreal summer hemisphere,coincident with remarkable reduction inevapotranspiration over the continental area.Therefore the coupled SSiB-AGCM runs reduce thebias of too much precipitation over land surface in most AGCMs,thereby bringing the simulatedprecipitation closer to observations in many continental regions of the world than CTL-AGCMruns.     

关于尺度分析的三个问题和尺度分析

对在一些作者中，在决定时间特征尺度，垂直速度特征尺度和分析高阶微商量级上的分歧进行了讨论，得出了初步结论。即对于单一尺度的运动，τ－L／U，W≤MUH/L和δ^nf/δx^n-F/L^n，根据讨论结果，给出了大气几种常用尺度运动的特征尺度的量级。还与中尺度重力波和强对流情况的分析观测结果进行了比较。     

重力辅助惯性导航的匹配算法初探

对重力辅助惯性导航技术的基本原理进行了分析,将采样卡尔曼滤波算法用于重力图形匹配。滤波通过设计少量的Σ点,并计算这些Σ点的经由非线性函数的传播,从而获得滤波值基于非线性状态方程的更新,较广义卡尔曼滤波具有计算精度高、便于计算的特点。     

几种插值法在海洋磁力测量数据格网化中的应用

为获得反映海区磁异常分布的磁异常图,海洋磁力测量数据处理中需要将离散数据通过插值方法进行格网化。给出了几种常用的数据格网化方法,并采用磁异常均匀分布和复杂分布情况对方法有效性进行了评价。结论表明:磁异常分布越复杂,对插值方法的要求越严格,无论是磁异常均匀分布还是复杂分布情况,Kriging法的效果最好,建议在海洋磁力测量数据处理中使用。