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星历数据
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  ephemeris data
     The R-D method utilizes the spacecraft ephemeris data and Range-Doppler frequency information of the SAR echo data to produce an estimatign of the target position.
     距离-多普勒(R-D)定位法是利用卫星星历数据和雷达回波数据的距离-多普勒信息对SAR图像目标进行定位,因无须在视场中选参考点,这对月面目标定位具有重要意义。
短句来源
     The most important context of this paper is:(1) Analysis of principle of satellite motion, analysis of GPS ephemeris data and observation data, designing of the model which can generate simulated ephemeris data and observation data.
     (1) 分析卫星运行原理,研究了卫星星历数据与观测数据的生成的数学原理,编制程序模块实现了这些数据的仿真。
短句来源
     In this paper, some advances in the use of digital image processing for solving the photogrammetric problems are discussed since professor Wang Zhizhuo's point of view "digital image processing will be a new operational field of photogrammetry". The subjects under discussion include fast differential rectification, image enhancement and digital mosaic, digital stereoorthophotomap, use of ephemeris data and estimation of parameters for LANDSAT and SPOT imagery.
     本文从王之卓教授关于“数字图象处理将是摄影测量的一个新的作业领域”的观点出发,介绍了用数字图象处理的方法解决摄影测量问题方面的某些进展,主要是:快速数字微分纠正,影象增强与镶嵌,数字立体正射影象图,LANDSAT和SPOT卫星图象的参量估计与星历数据的利用。
短句来源
     This method utilizes the spacecraft ephemeris data and RangeDoppler frequency information of the SAR echo data to produce an estimate of the ground target position ,and algorithm for relative location is derived.
     本文论述了利用卫星星历数据和雷达回波数据的距离-多普勒信息对SAR图像目标定位的原理,并对相对位置定位算法的计算公式进行了推导。
短句来源
     This article mainly discusses the theory and feasibility of setting control network using multi-model GPS receiver. It introduces the methods and skills of the field collection and post processing for the Ephemeris data.
     主要探讨了多种型号GPS接收机联合布设控制网的原理及可行性,介绍了野外星历数据采集及数据后处理的方法和技巧。
短句来源
  “星历数据”译为未确定词的双语例句
     Secondly, the point positioning is done with the 2 hours , 1 hour and 20 minutes phase observation data after the canceling of the SA by using broadcast ephemerides, the precision for 2 hours data is about 1.2 meter, the precision for 1 hours data is about 1.8 meter, better than that for 20 minutes data.
     接着,用取消SA后的2小时、l小时和20分钟的相泣和广播星历数据进行计算,得到2小时观测数据的计算结果为1.2米左右的精度,1小时观测数据精度为1.8米水平,好于20分钟观测数据的结果。
短句来源
     Using the broadcast ephemerides and precision ones provided by the international GPS service for geodynamics (IGS), the change law of the orbit the errors and the corrected clock errors of GPS satellites can be analyzed.
     利用国际 GPS地球动力学服务 (International GPS service (IGS) forgeodynamics)提供的广播星历和精密星历数据 ,全面分析 GPS卫星轨道及其钟差修正量误差的变化规律。
短句来源
     If IGS predicting ephemerides are applied to navigation calculation instead of the broadcast ones, the positioning accuracy can be increased by 5 m.
     若使用 IGS预报星历代替广播星历数据进行导航定位计算 ,可以使定位精度提高 5 m。
短句来源
     In the end, the analysis of error sources and the method of further improving location accuracy are given.
     最后,本论文分析了有关象素定位误差源,指出增加地球模型描述的精确性、改进星上处理器对星历数据的记录精度,将会进一步提高绝对定位精度。
短句来源
     Geodetic GPS receiver system consists of the ST 1 receivers,which is a single frequency receiver with 8 channels,and the stasic post processing software GPNT1. The Characteristics of ST 1 system are as follows: observation data: C/A pseudo range,carrier phase and ephemeris processing model: difference accuracy of baseline: 10mm+2ppm×D
     静态测量型GPS接收机系统由 8通道、单频ST 1接收机和静态后处理软件两部分组成 ,通过跟踪测量卫星载波信号、测距码信号及数据码 (包含有星历数据 )信号 ,获得伪距和载波相位观测值 ,采用差分 (主要是双差 )处理方法 ,达到精确测定两接收机天线间相对位置的目的。 基线测量精度为 1 0mm + 2 ppm×D
短句来源
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  相似匹配句对
     DATA & INFORMATION
     数据
短句来源
     DATA
     数据
短句来源
     Recoverying the Gravitational Potential Model from the Ephemerides and Accelermeter of CHAMP
     利用CHAMP卫星星历及加速度计数据推求地球重力场模型
短句来源
     Orbit Computation and Data Fusion of GPS/GLONASS Integrated Navigation System
     GPS/GLONASS组合导航中的星历计算与数据融合
短句来源
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  ephemeris data
From the research, it is obviously found that non-rigorous orientation and triangulation models can be used successfully in most cases for 2D rectification and 3D ground points determination without a camera model or the satellite ephemeris data.
      
These ephemeris data may be calculated in terms of the initial measured values independently of the employed coordinate system.
      
An algebraic method for the resolution of tabulated function into a class of elementary functions is examined on the high precision ephemeris data from the JPL DE 200.
      
Both almanac and ephemeris data are required for a GPS receiver to locate and acquire satellites quickly and compute a position fix.
      
Cold start means the receiver is started without any almanac or ephemeris data.
      
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In this paper, some advances in the use of digital image processing for solving the photogrammetric problems are discussed since professor Wang Zhizhuo's point of view "digital image processing will be a new operational field of photogrammetry". The subjects under discussion include fast differential rectification, image enhancement and digital mosaic, digital stereoorthophotomap, use of ephemeris data and estimation of parameters for LANDSAT and SPOT imagery.

本文从王之卓教授关于“数字图象处理将是摄影测量的一个新的作业领域”的观点出发,介绍了用数字图象处理的方法解决摄影测量问题方面的某些进展,主要是:快速数字微分纠正,影象增强与镶嵌,数字立体正射影象图,LANDSAT和SPOT卫星图象的参量估计与星历数据的利用。

In this paper,a comprehensive method of estimation of Doppler Centroid and Doppler Frequency rate for spaceborne SAR are demonstratde. This method can provide Doppler parameters automatically in the case of lacking data of satellite ephemeris and satellite attitude. This method is proposed based on the properties of Doppler parameters and estimation error of Doppler parameters.Finally,the raw data of Ocean satellite SEASAT-A are used to test effectiveness and feasibility of this method. The results of imaging...

In this paper,a comprehensive method of estimation of Doppler Centroid and Doppler Frequency rate for spaceborne SAR are demonstratde. This method can provide Doppler parameters automatically in the case of lacking data of satellite ephemeris and satellite attitude. This method is proposed based on the properties of Doppler parameters and estimation error of Doppler parameters.Finally,the raw data of Ocean satellite SEASAT-A are used to test effectiveness and feasibility of this method. The results of imaging with raw data are presented to verify the validity of the approach.

本文给出了一种综合的星载合成孔经SAR雷达多普勒参数估计方法,该方法可以从雷达回波数据本身提取多普勒参数进行成像处理,甚至可以不依赖卫星星历数据和姿态数据作为初始估计量,该方法是基于对多普勒参数及其误差的性质的研究而提出的。最后,利用SEASAT-A海洋卫星的SAR原始数据的多普勒参数估计结果和采用该参数进行成像处理的结果,验证了该方法的可行性和有效性。

The rigid body′s attitude determination is discussed using two baselines based on GPS; baseline vector coordinates are calculated with GPS double difference phases, and phase integer ambiguities are calculated with the aid of double difference pseudorange observables. By space transformation, the searching time of the integer ambiguity candidates in the confidence ellipsoid space can be reduced when dual frequency observables are available. Correctly resolving the integer ambiguities depends on the observed...

The rigid body′s attitude determination is discussed using two baselines based on GPS; baseline vector coordinates are calculated with GPS double difference phases, and phase integer ambiguities are calculated with the aid of double difference pseudorange observables. By space transformation, the searching time of the integer ambiguity candidates in the confidence ellipsoid space can be reduced when dual frequency observables are available. Correctly resolving the integer ambiguities depends on the observed time and the observed pseudorange accuracy. Attitude precision is analyzed based on error propagation laws. Calculations with one periodic ephemerides data show that head or pitch precision level can reach about 2 mrads under certain conditions.

研究了采用双基线方案测量载体的姿态,利用GPS双差相位测量基线矢量,双差伪距观测值辅助解相位整周模糊,双频时引入空间变换缩小置信空间搜索次数,通过实例分析得出了正确解算相位模糊与观测次数、伪距测量精度的关系,并利用误差传播定律对姿态测量精度进行分析,结合卫星星历数据计算表明,在卫星运行周期内航向角和俯仰角平均测量精度在一定条件下优于2mrad。

 
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