卫星星历

探讨了提高弹载接收机的抗干扰能力的方法.针对战术弹道导弹标准飞行弹道，利用实测卫星星历进行了仿真，给出了仿真结果。

The simulations have been carried out by using reference trajectory of TBM and measured navstar ephemeris , and the simulation results are given .

·评定PRN05／06号GPS卫星星历的精度；

To evaluate the ephemeris accuracy for GPS satellites ( PAN05 / 06 );

卫星星历误差对GPS定位精度的影响与分析

Effect and Analyse of Broadcast Ephemeris Errors on GPS Survey Precision

卫星星历残存误差对差分GPS精度影响的分析

An Analysis of the Satellite Catalogue Error Affecting Differential GPS Precision

同时，也对GPS卫星星历的精度和实时性提出了越来越高的要求。

Meanwhile , we need the GPS satellite ephemeris to be more accurate .

GPS卫星星历的精度分析

Precision analysis of GPS satellite Ephemerides

不同卫星星历对GPS数据处理的影响

The Effect of Different Ephemeris on the Exactness of GPS Data Processing airborne ECM set for self defence

应用GRACE卫星星历数据反演地球重力场模型

Gravity Field Model Recovery Based on GRACE Ephemerides

在GPS基线解算中，卫星星历是解基线的数学基础，星历的精度对基线解算结果具有影响。

The ephemeris of GPS satellites and the coordinates of the satellites are the mathematical basis in solving the GPS baselines .

主要工作及结论是：1、介绍了GPS卫星星历的类型。

The main work and conclusions of this study are summarized as follows : 1 、 All kinds of the GPS satellite ephemeris are introduced .

基于CHAMP卫星星历反演地球重力场的两种方法

Two methods for recovering gravitational potential from the ephemerides of CHAMP

分析了GPS卫星星历误差的影响特征与规律，提出了广播星历误差影响诊断与预测模型。

This paper analyzed the characters and rule of the satellite ephemeris error . It proposes the Model of the diagnosis and Forecast for the GPS broadcasting ephemeris error .

本文主要从影响局域差分GPS精度的空间相关性和时间相关性展开，对影响测距精度的误差源（对流层延迟、电离层延迟和卫星星历误差）进行了较深入地研究。

It is mainly discussed from the spatial correlation and temporal correlation which influence accuracy of local area differential GPS , the error sources ( troposphere delay , ionosphere delay , and orbit errors ) are studied thoroughly .

结合工程控制网自身的特点，讨论了GPS应用于工程测量时应注意的几个问题，如卫星星历误差和WGS84起算点精度对GPS基线解算的影响；

According to features of the engineering control net and GPS applications in engineering surveying , this paper has discussed several problems in applications of GPS to engineering control surveying , such as error of satellite orbit and the influence of known point to GPS baseline solution ;

根据模拟的CHAMP卫星星历，分别采用基于牛顿运动定律的数值微分法和基于能量守恒定律的能量守恒法建立观测方程，恢复出50阶次的重力位系数。

In this paper , observation equations are constructed according to the numerical differentiation based on Newton 's law of motion and the energy conservation respectively . The gravitational potential coefficients are recovered until degree 50 based on simulated CHAMP ephemerides .

卫星星历是卫星定位的前提和基础，其轨道精度将直接影响定位的精度和结果。

Satellite ephemeris is the premise and base for satellite positioning , the accuracy of the orbit will directly influences the accuracy and result of positioning .

为了避免误判和漏判消息帧，对原始二进制数据流进行解码以获得测量数据和卫星星历时使用了滑窗算法。

To avoid missing and losing message frame , it adopts slide-window algorithm to code the binary data stream and to acquire measurement data and ephemeris data .

在数据采集与处理环节，采用二进制格式从接收机获得数据，并对接收到的原始数据进行解算，以获得姿态解算所需的数据：包括双差载波相位数据以及卫星星历信息。

In the stage of data acquisition , the necessary information for attitude determination is extracted from GPS receivers in binary format , including dual-differential carrier phase and ephemeris of GPS satellites .

最后，分析得出本文定位模型的定位精度主要取决于地球模型的有效性、斜距和多普勒参数测量的准确性以及卫星星历数据的精确度等。

Finally , after analysis , the positioning accuracy of the positioning model in this paper is mainly influenced by effectiveness of the earth model , slant range , and the accuracy of both Doppler parameters measurement and satellite ephemeris data .

在实际的工作中，卫星星历的预报有助于作业计划的制定，科学合理的作业调度计划是提高测量效率的有效手段，数据处理参数的正确设置是取得合格结果的保证。

In fact , it is helpful of the forecast of the satellite ephemeris to make the operation scheme , the scientific operation management is an effective method for improving efficiency , correct set of the data processing parameter is the guarantee of qualified results .

GPS系列卫星广播星历轨道和钟的精度分析

Precision Analysis on Orbit and Clock of GPS Satellites Broadcast Ephemeris

太阳活动对GPS卫星广播星历的影响

Influence of solar activity on GPS broadcast ephemeris

首次采用星站双差分技术试验研究GPS卫星广播星历误差影响值，推导了星站双差解析模型；最后，进行了试验和技术分析。

The influence of broadcasting ephemeris error is estimated from the satellite-station double difference technology .

GPS卫星广播星历的一种应用途径

A way of applying GPS broadcast ephemeris

GPS卫星预报星历的适用性

The Applicability of GPS Forecasting Ephemeris

基于GPS广播星历参数，研究了导航卫星广播星历参数的非线性最小二乘拟合算法，并推导了相应的计算公式。

Based on the GPS broadcast ephemeris parameters , the nonlinear least square fit algorithm of broadcast ephemeris parameters was developed , and the relevant calculation formulas were derived .

GPS卫星预报星历的适用性LAGEOS精密预报星历的精度估计

The Applicability of GPS Forecasting Ephemeris THE ESTIMATION OF THE PRECISION OF THE SATELLITE LAGEOS PREDICTING EPHEMERIS

对只接收到一组GPS卫星广播星历的情况下应用广播星历拟合计算卫星在轨位置的方法进行了研究，通过与精密星历进行比较，对拟合计算的精度进行了说明。

A method of GPS satellite orbital coordinates calculating with Chebyshev Polynomial Simulation was devised in this paper based only on receiving a group of GPS broadcast ephemeris . By comparing with GPS precise ephemeris , the accuracy of calculation was analyzed .

本文通过定量分析卫星预报星历的精度，对应用预报星历预报卫星的几何分布精度因子的可行性进行了探讨，提出应用预报星历对GPS测量进行优化设计的思想。

In this paper , based on analyzing the precision of forecasting ephemeris quantificationally , the feasibility of applying the forecasting ephemeris to predict the DOP was researched , and the view of GPS optimization design on GPS ephemeris was put forward .

中高轨卫星广播星历精度分析算例表明，该方法能够有效减弱GLONASS卫星广播星历的拟合误差，卫星位置的精度损失从0.5米降到毫米级；

Precision Analysis of Broadcast Ephemeris for Medium and High Orbit Satellites The given cases show that all the GLONASS broadcast ephemeris fitting errors are almost eliminated entirely .