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电离层时延
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  ionospheric delay
     The performance and characteristic of the receiver NTSCGPS-2 are as follows:(1)It can measure the ionospheric delay in real time via dual-frequency observation;
     NTSCGPS-2具有如下性能特点:(1)采用双频观测,可实测电离层时延;
短句来源
     The results indicate that the precisions for single-station timing and GPS-CV(Common-View)time transfer after correcting the ionospheric delay with TEC-map are better than those with the theoretical model for single-frequency GPS receivers.
     结果表明 :对于单频GPS接收机 ,采用TEC图作电离层时延改正后的单站定时和共视比对精度比用理论模型作改正的精度有很大的提高。
短句来源
     To improve the algorithm of the correction in differential GPS,this paper presents a simple and vivid ionospheric model on the basis of the contours of monthly average ionospheric time delay,and analyses the positioning error introduced only by the ionospheric delay in the conventional GPS and the position differential GPS.
     为了改进差分GPS的校正算法,本文在月平均电离层时延等值图的基础上,建立了一个简单而又逼真的电离层模型,并分析了普通GPS和位置差分GPS仅电离层单一因素引入的定位误差。
短句来源
     A method of determing the ionospheric delay with the two-way satellite dual-frequency(C band)observation is introduced,and the results from the observations for different longitudes and latitudes are analysed and compared to each other.
     介绍了利用卫星双向双频(C波段)观测来测定电离层时延的方法,并对不同经纬度的观测结果进行了比较和分析。
短句来源
     AN IMPROVED GRID-BASED CORRECTION ALGORITHMS FOR THE IONOSPHERIC DELAY IN WAAS
     改进的WAAS电离层时延网格修正算法
短句来源
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  ionospheric time delay
     Ionospheric Time Delay Corrections for GPS Time Transfer
     GPS共视时间比对中的电离层时延改正问题
短句来源
     To improve the algorithm of the correction in differential GPS,this paper presents a simple and vivid ionospheric model on the basis of the contours of monthly average ionospheric time delay,and analyses the positioning error introduced only by the ionospheric delay in the conventional GPS and the position differential GPS.
     为了改进差分GPS的校正算法,本文在月平均电离层时延等值图的基础上,建立了一个简单而又逼真的电离层模型,并分析了普通GPS和位置差分GPS仅电离层单一因素引入的定位误差。
短句来源
     The pseudorange differential positioning can calibrate the error of ionospheric time delay, but the ealibrating accuracy varies with the difference between the obliquity factors of the user to a satellite and the reference station to the same satellite.
     伪距差分定位能够校正电离层时延误差 ,但校正精度随用户与基准站到同一颗卫星倾斜因子的不同而不同。
短句来源
  “电离层时延”译为未确定词的双语例句
     , and can work in high dynamic and weak signals enviroment. Its outputs include the C/A pseudrange, L1 carrier phase, L2 carrier phase and the L2 ionospheric delays.
     要求接收机可以工作于高动态、弱信号的环境下,实现GPS 的C/A 码伪距、L1 载波相位、L2 载波相位以及电离层时延的跟踪输出,为后续的应用提供基础。
短句来源
     AN IMPROVED GRID-BASED CORRECTION ALGORITHMS FOR SPARSELY OBSERVATION STATION REGION IN WAAS
     观测站稀疏地区的WAAS电离层时延网格修正算法
短句来源
     This paper describes how BIRMM has been carried out the study of timecalibration and frequency comparison by using GPS since 1 986. The study indudes GPStiming frequency calibration system, single station timing, SA's influence to timing accura-cy, GPS timing signal noise model, Kalman filter,estimation for ionosphere, time delay,GPS common-view test, GPS frequency calibration and receiving system error measuring.
     全面介绍了BIRMM从1986~1992年间从事利用时间GPS进行时间传递与频率比对技术研究方面的情况,包括所建立的CPS定时校频系统、单站定时、SA对定时精度的影响、GPS定时信号噪声模型、卡尔曼滤波、电离层时延估算、GPS共视试验、CPS校频、接收系统差测量等。
短句来源
     The effects are simulated of solar activity on GNSS occultation signal delay and the variations of GNSS signal phase delay within a day and within a year. The results show that the solar activity has a great effect on ionospheric signal delay, and that the variations of GNSS occultation signal within a day and within a year are also large.
     分别模拟了太阳活动对 GNSS掩星信号电离层时延的影响 ,以及 GNSS掩星信号电离层时延的年变化和日变化情况 ,结果发现太阳活动对电离层 GNSS信号时延有较大影响 ,GNSS掩星信号电离层时延在一年和一天中都有较大起伏
短句来源
     GPS common-view is still one of the most powerful tools in the TAI computation up to now.
     众所周知 ,GPS共视是目前国际上主要的时间传递比对技术 ,其中扣除电离层时延是很重要的一个方面。
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  ionospheric delay
For differential GPS, the ionospheric delay can, however, be either increased or decreased compared with the case of no gradient, depending on the gradient direction.
      
To deal with the influence of ionospheric delay, a method for forming dual-frequency ionospheric free carrier phase measurements is detailed.
      
An improvement to ionospheric delay correction for single-frequency GPS users - the APR-I scheme
      
This is particularly necessary when differential ionospheric delay corrections cannot be broadcast, when users cannot receive them, or when there are ionospheric anomalies.
      
The robust recurrence technique is based on the efficient combination of single-frequency GPS observations by users and the high-precision differential ionospheric delay corrections from WAAS.
      
更多          
  ionospheric time delay
The ionospheric time delay is one of the main error sources in C/A code GPS navigation and positioning applications.
      


Radio Determination Satellite Service is one of the second generation satellite navigation-position fixing systems which posseses high accuracy in position within 10m. Spread-spectrum PN code ranging and differential Posi tioning technology are used to make it possible to reach such accuracy. Errors, such as ionospheric delay variations, satellite ephemeric errors and the shape uncertainty of the earth (the geoid) can be largly compensated by using differential technology.The differential technology and system...

Radio Determination Satellite Service is one of the second generation satellite navigation-position fixing systems which posseses high accuracy in position within 10m. Spread-spectrum PN code ranging and differential Posi tioning technology are used to make it possible to reach such accuracy. Errors, such as ionospheric delay variations, satellite ephemeric errors and the shape uncertainty of the earth (the geoid) can be largly compensated by using differential technology.The differential technology and system accuracy analysis are described in this paper.

卫星定位通信系统是具有10米以内高精度的第二代卫星导航定位系统。达到高精度的关键是应用了伪随机码扩谱及差分定位技术。诸如星历误差、电离层时延变化和地球模型不准等误差,通过应用差分技术可以大部分消除。本文阐述了差分技术的应用和系统精度分析。

In the absence of the selective availability errors,the positioning accuracy of differential GPS is strongly dependent on the spatial decorrelation of the ionosphere. To improve the algorithm of the correction in differential GPS,this paper presents a simple and vivid ionospheric model on the basis of the contours of monthly average ionospheric time delay,and analyses the positioning error introduced only by the ionospheric delay in the conventional GPS and the position differential GPS.

在没有选择可用性条件下,差分GPS定位精度完全取决于电离层的空间不相关性。为了改进差分GPS的校正算法,本文在月平均电离层时延等值图的基础上,建立了一个简单而又逼真的电离层模型,并分析了普通GPS和位置差分GPS仅电离层单一因素引入的定位误差。

This paper describes how BIRMM has been carried out the study of timecalibration and frequency comparison by using GPS since 1 986. The study indudes GPStiming frequency calibration system, single station timing, SA's influence to timing accura-cy, GPS timing signal noise model, Kalman filter,estimation for ionosphere, time delay,GPS common-view test, GPS frequency calibration and receiving system error measuring.

全面介绍了BIRMM从1986~1992年间从事利用时间GPS进行时间传递与频率比对技术研究方面的情况,包括所建立的CPS定时校频系统、单站定时、SA对定时精度的影响、GPS定时信号噪声模型、卡尔曼滤波、电离层时延估算、GPS共视试验、CPS校频、接收系统差测量等。

 
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