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In this dissertation, GPS baseline solution precision is analyzed since the following aspects: 1, Different length baselines are processed and analyzed by single frequency model and ionosphere free model. 2, Basing on current single point positioning precision, certain coordinate error is added into fixed points to study the result. 3, Baseline is processed and analyzed with different observation vectors and their lineal combination models. 4, 24 hours observation was divide up to process baseline.

本文从以下几个角度研究了影响GPS基线解算精度的因素:1、采用单频和消电离层模式对不同长度的基线分别解算,对处理结果进行分析。2、根据目前单点定位精度给起始点加上适当的坐标偏差,研究起始点坐标偏差对基线处理结果的影响。3、选用不同的观测值及其线性组合,对基线解算结果进行研究。4、对24小时观测的数据分时段处理,分析观测时间段对基线处理结果的影响。

Factor analysis is a very popular multivariate statistical analysis method. It can summarize some unobservable factors from the test results which can summarize most of the observed data. The factor analysis suggest the DP, furfuran and CO_X can be divided into insulation aging factor, while the hydrocarbon gas and hydrogen were divided into another group which can be called insulation fault factor. The result of the factor analysis

因子分析作为一种常用的多元统计分析方法,可从众多可观测变量中,概括和推论出少数不可观测的潜变量,用最少的因子去概括和解释大量的观测事实;本文将试验过程中90℃下油中溶解气体、绝缘聚合度、糠醛等参量进行因子分析,结果表明:绝缘聚合度、糠醛、CO_x被分为一类,代表绝缘老化因子:烃类、氢气、被分为一类,代表绝缘故障因子;因子分析结果与现场经验一致,相互印证,具有重要意义。

Surface ozone data of Mauna Loa and the other 14 monitoring sites of altitude lower than 1000 m in the northern hemisphere were used to give a joint discussion for the distribution and variation features of surface O3. The data, based on ground observation, were collected, processed, and distributed by WDCGG (World Data Centre for Greenhouse Gases) in GAW. The monthly mean and hourly data of surface ozone in these 15 sites were analyzed to sum up the difference of surface ozone annual and seasonal variations in different areas of the northern hemisphere.

利用来自GAW(Global Atmosphere Watch,全球大气监测)的、由WDCGG World Data Centre for Greenhouse Gases,世界温室气体数据中心)收集整理和发布的、基于地基观测的北半球共15个站点的地面O3含量的逐月观测资料以及逐时观测资料,分析、对比并总结了北半球不同经纬度各区域的地面O3含量的年变化和各个季节的日变化规律。

It consists of a hidden Markov process and an observation process.

它包括一个不被直接观测的马尔可夫过程和一个与之相关的可观测过程。

Based on Pseudo-linearization and least square methods, the bearings-only target motion problem was studied under the conditions that the target takes uniform rectilinear motion in 2-dimensional space, the single observer takes uniform rectilinear motion first, and then takes rectilinear motion with constant acceleration. The necessary and sufficient observable conditions, some unobservable conditions are gained.

基于拟线性处理和最小二乘方法,在目标作匀速直线运动,单观测站作匀速直线运动,进而作匀加速直线运动的机动情形下,研究了二维纯方位系统的可观测性,得到了系统可观测性的充要条件以及系统的某些不可观测的条件。

Along with continuous development of broadband seismologic observation techniques, the density of global and regional digital seismologic observation networks is constantly increasing, and the quantity of broadband seismograph using for mobile seismologic observation will rapidly increase.

随着宽频带地震观测技术的不断发展,全球及区域数字地震观测台网的密度正在不断加大,用于流动地震观测的宽频带地震仪的数量将继续迅速增加。

This paper compares the visibility observed automatically by MITRAS atmospheric transmissometer made by VAISALA Company in Finland with the visibility record of artificial observation, analyzes the difference between these two kinds of observation data, and finds out the relationship between them through statistical analysis.

摘 要:将芬兰VAISALA公司的MITRAS大气透射仪自动观测的能见度与人工观测的能见度记录进行对比,分析两种观测数据的差异,通过统计分析,找出他们之间的关系。

The research work discussed in this dissertation aims to image time-dependent 3-D distribution of ionospheric electron density, Ne, in the region to be recovered from the combination of ground-based GPS network measurements and GPS beacon observations obtained by a receiver on board of Low Earth Orbit satellite when the GPS satellite is occulted by the surface of the Earth as seen by the receiver.

比如,结合地基GPS与掩星观测的时变三维电离层层析成像数学上的重建公式尚未建立,由GPS地面台网观测和低轨卫星获得的掩星观测数据实现时变三维电离层层析的反演算法和计算机程序有待发展等等。

On the condition of remote observation and quasi- monochromatic observation,a compact image-plane interference mathematical model is deduced with OAS optical transfer function and the property of Fourier transform.

在观测目标相当遥远及准单色观测条件下,根据光学综合孔径光学传递函数以及傅里叶变换性质建立了一个简化的像面干涉光强分布数学模型,此数学模型的物理含义符合光学综合孔径成像观测的实际情况;根据光学综合孔径瞳面干涉条件,在光学综合孔径像面干涉数学模型的基础上得到瞳面干涉的数学模型。

For main-belt objects this can occur after the object has been observed on two or more nights at four oppositions (although this depends on the number and distribution of the observations as well as their quality); NEOs can receive a number after two or three well-observed oppositions.

对于主带小行星,只要在4个冲日内观测到两个或更多的夜晚(虽然这依赖观测的数量和分配以及观测的质量),就可以获得正式编号;对于近地小行星,只要获得两个或三个比较好的冲日数据,就可以获得正式编号。

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