查询词典 GPS

GPS satellite precise ephemerides provided by IGS describe there dimension position of GPS satellites in ITRF.

IGS提供的精密星历描述了GPS卫星在地固系中的三维位置。

In this paper the mathematical models and methods for GPS single-point positioning are studied systematically on the theory.All kinds of error correction formulas are studied,such as ironsphere correction,troposphere correction,relativistic effect correction,earth rotation correction ,earth tides correction ,satellites antenna phase center offset correction. GPS single-point positioning programs is coded with pseudoranges and broadcast ephemerides,phases and broadcast ephemerides,and phases and precise ephemerides.And a great amount of computation has been done using the data collected .The results are computed with the 24 hour pseudoranges observation data before and after the canceling of the SA.

本文从理论上系统地研究了GPS单点定位的数学模型和方法，研究了各项误差改正公式，例如电离层改正、对流层改正、相对论周期部分改正、地球旋转改正、地球固体潮改正、卫星天线相位中心偏差改正；编写了伪距与广播星历、相位和广播星历及相位和精密星历的定位程序，并使用有关数据进行了大量的计算工作。

Originally, GPS was used as a tool of establishing the precision class of geodetically networks and various of controlling networks .With the development of GPS techniques, great changes have taken in every fields of surveying and mapping.

作为较早采用GPS技术的领域，在测量中，它最初主要用于高精度大地测量和控制测量，建立各种类型和等级的测量控制网；现在，它除了继续在这些领域发挥着重要作用外，还在测量领域的其它方面得到充分的应用，如用于各种类型的施工放样、测图、变形观测、航空摄影测量、海测和地理信息系统中地理数据的采集等。

In some circumstances GPS receivers can receive only incontinuous or partial satellite signals,it's still an open issue how to measure velocity and calculate location with partial GPS signals.

在某些特定的应用情况下，GPS接收机接收到的信号是非连续，或者是间段瞬时的。如何合理有效地利用间段的瞬时GPS信号进行定位、测速是个很有意义的课题。

The principle of remote sensing of water vapor along the slant path using GPS is described in this paper. First, the nonisotropic component of water vapor in different azimuth above the GPS receiver is calculated using the wet gradient and the postfit residuals, and then slant path water vapor is recreated.

本文介绍了地基GPS沿倾斜路径方向遥感大气水汽总量的原理和方法；首先用湿梯度、后处理残差联合计算接收机上空不同方位上大气水汽各向异性成分，在此基础上重构倾斜路径水汽总量。

The results showed that:(1) some governing points, which were measured by submeter precision GPS, were utilized to correct the 1 m precision remote sensing image and it could satisfy the desired precision of geometrical correction, therefore, this method could be used as geometrical correction in the region where was short of the big scale relief map;(2) the density of the original data was the main factor to affect precision of the volume, and the precision of the calculated volume of earthwork could be improved to more than 90% when using the test points and feature points; the sparser the data density were, more significant could be improved; On the base that elevation of test points were measured by the submeter precision GPS, the error of the volume, which was produced by vectoring relief map to obtain DEM, could be calculated, and the calculation precision of the earthwork could be improved markedly.

结果表明：利用平面精度达亚米级的GPS测量控制点坐标对1米分辨率的遥感卫星影像进行几何校正，能够满足其几何校正的精度要求，可以解决缺乏大比例尺地形图地区的高分辨率遥感卫星影像的几何校正问题；通过对模型数据的分析，数据密度是影响体积精度的主要因素，利用检测点高程和特征点可以提高土方量计算的精度，使土方量计算的精度达到90％以上，数据密度越稀疏，精度提高越显著；采用高程精度达厘米级的RTK(Real Time Kinematic实时动态差分)测量检测点的高程，对用地形图扫描矢量化形成的DEM模型进行检测求出误差体积，可以大大提高土方量的计算精度。

Toll Collect's on-board units use GPS to determine a truck's position. To compensate for the technology's weaknesses—it can only determine the truck's position to within a few metres—the device compares the GPS data with information from the tachograph and a built-in gyroscope.

公路收费的车载单元使用GPS确定卡车位置，为弥补技术上的缺陷（在确定卡车位置时会存在几米的误差），设备将GPS上的数据与计速器和一个内置陀螺仪上的数据对比。

Using GPS merely as an auditing tool is no problem, because the OBU only has to determine its position every now and then. Tachograph and GPS data are saved on a smart card, which is then sent to the customs authority or its content downloaded online.

转速表和计速器上的信息存在一张智能卡上，智能卡会被送到海关或用以在线下载的信息储存设备。

In this dissertation, we selected a lot of actual aerial photographs, which use as surveying and mapping the topographic maps at the scale of 1:500～1:50000, with airborne GPS data taken from five projects which include all type of topographics from flat to mountain in China were processed by our GPS-supported aerotriangulation.

经采用自行研制的两个软件GPSkin和WuCAPS〓进行GPS辅助光束法区域网平差，获得了满足我国现行《航空摄影测量内业规范》的加密结果。

Reference frame's uniformation methods, adjustment methods and the implication of corresponding datum for various adjustment methods are systematically discussed about high precision GPS network. The systematical investigates on the choice of reference station in the high precision GPS data processing and the effect to adjustment results are made. Some general principles on the choice of reference station are presented.

系统地讨论了高精度GPS网数据处理中参考框架的统一方法、平差方法及各种平差方法所对应基准的意义，针对高精度GPS数据处理中基准站选取对平差结果的影响进行了系统地分析，提出了基准站选取的一般原则。

Based on the construction of international financial centre, we have pushed forward the explorations in the integration of cultural industries with financial services.

2010年及整个"十二五"期间，上海文化产业面临更有利的发展时机、更坚实的发展基础和更完善的发展环境。

The koala is an animal with a large bag in its body.

树袋熊用它的身体的一个大的袋子是一只动物。