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电离层时延改正
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  “电离层时延改正”译为未确定词的双语例句
     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
     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
     The selection of common view data and the methods of filtering the random noise from the observed data are introduced. The metheds to correct ionospheric delay and geometric delay for GPS CV comparison are expounded. The calculation results for the data of CV comparison between NTSC(National Time service Conter,the Chinese Academy of Sciences)and CRL(Communications Research Laborntory,which has been renamed National Institute of Information and Communications Technology)are presented.
     介绍了GPSCV时间比对中共视数据的选取和消除观测数据中的随机噪声的方法,对GPS共视时间比对中的电离层时延改正和几何时延改正方法作了阐述,给出了对NTSC(中国科学院国家授时中心)与CRL(日本通信研究所,现已更名为国家信息和通信技术研究院(NICT))两个时间实验室之间的共视比对数据的计算结果。
短句来源
  相似匹配句对
     THE EFFECTS OF IONOSPHERIC VARIATION ON TIME LAG OF SHORT WAVE PROPAGATION AND ITS CORRECTIONS
     电离层变化对短波传播时延的影响及改正
短句来源
     The Effects of Ionospheric Variation on Time Lag of Short Wave propagation and the Corrections
     电离层变化对短波传播时延的影响及改正(摘要)
短句来源
     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
     Evaluation of Rectification Model of Ionosphere Influences in GPS Operation
     GPS电离层改正模型的评价
短句来源
     Brief Review of the Ionospheric Delay Models
     电离层延迟改正模型综述
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  ionospheric delay correction
An improvement to ionospheric delay correction for single-frequency GPS users - the APR-I scheme
      


GPS common-view is still one of the most powerful tools in the TAI computation up to now.To improve the precision for GPS time transfer is becoming more and more important along with the continuous improving of the qualities of atomic clocks.The precision lies on a few effects among which ionospheric delay is an important one.The method of calculating the ionospheric delay using TEC-map is introduced.The results indicate that the precisions for single-station timing and GPS-CV(Common-View)time transfer after...

GPS common-view is still one of the most powerful tools in the TAI computation up to now.To improve the precision for GPS time transfer is becoming more and more important along with the continuous improving of the qualities of atomic clocks.The precision lies on a few effects among which ionospheric delay is an important one.The method of calculating the ionospheric delay using TEC-map is introduced.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.Besides,the comparisions show that the precisions for time transfer between time labs in Asia-Pacific region are lower than those in Europe and America,which is probably because there are much less IGS stations to measure TEC so as to cause lower precisions of TEC for Asia-Pacific region.

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。介绍了如何采用国际GPS服务中心 (IGS -Interna tionalGPSService)公布的电离总电子含量 (TEC—TotalElectronContent)图来进行电离层时延改正。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。通过比较还表明 ,亚太地区的时间实验室之间的时间传递精度比欧美地区的要低 ,这可能是因为亚太地区用于测量TEC的IGS测站少 ,因而导致该地区的TEC的精度较低。

GPS CV method will play an important role in JATC(joint atomic time of China) system which is being rebuilt.The selection of common view data and the methods of filtering the random noise from the observed data are introduced.The metheds to correct ionospheric delay and geometric delay for GPS CV comparison are expounded.The calculation results for the data of CV comparison between NTSC(National Time service Conter,the Chinese Academy of Sciences)and CRL(Communications Research Laborntory,which has been renamed...

GPS CV method will play an important role in JATC(joint atomic time of China) system which is being rebuilt.The selection of common view data and the methods of filtering the random noise from the observed data are introduced.The metheds to correct ionospheric delay and geometric delay for GPS CV comparison are expounded.The calculation results for the data of CV comparison between NTSC(National Time service Conter,the Chinese Academy of Sciences)and CRL(Communications Research Laborntory,which has been renamed National Institute of Information and Communications Technology)are presented.

GPSCV(共视)时间传递技术将在重建的我国的综合原子时(JATC)系统中起重要作用。介绍了GPSCV时间比对中共视数据的选取和消除观测数据中的随机噪声的方法,对GPS共视时间比对中的电离层时延改正和几何时延改正方法作了阐述,给出了对NTSC(中国科学院国家授时中心)与CRL(日本通信研究所,现已更名为国家信息和通信技术研究院(NICT))两个时间实验室之间的共视比对数据的计算结果。

Two subjects are involved in accordance with the data processing of satellite VLBI observations in the national lunar project. One is about the error budget of the ionospheric delay correction with the presumably known uncertainties of the delay observation in S and X band as 1ns. The other is about the possible means to correct the ionospheric effect in case of the unavailable observations in S/X dual bands. General characteristics is reviewed and discussed on the ionosphere reference models, the historical...

Two subjects are involved in accordance with the data processing of satellite VLBI observations in the national lunar project. One is about the error budget of the ionospheric delay correction with the presumably known uncertainties of the delay observation in S and X band as 1ns. The other is about the possible means to correct the ionospheric effect in case of the unavailable observations in S/X dual bands. General characteristics is reviewed and discussed on the ionosphere reference models, the historical accumulation of astrometric and geodetic VLBI observations, local GPS network, GPS receiver within the IGS network as well as individual GPS receiver with particular designation of settings and supplement infrastructure. The comparison of the Total Electronic Content (TEC) resulted from VLBI and GPS is presented in order to demonstrate the current status of related studies.

结合我国探月项目卫星VLBI测轨资料分析中的实际需求讨论了两个问题一是在S、X波段时延测量精度均为1ns情况下,电离层延迟改正所能够达到的精度;二是在飞行器VLBI测轨过程中,不能确保S、X波段双频观测情况下获取电离层时延改正的可能途径,包括借助于相关电离层模型、利用常规VLBI历史观测资料积累、借助于局域GPS观测网和IGS网单站GPS测量以及借助于专门设计的单站GPS测量等。最后对电离层VLBI和GPS技术实测结果进行了比较和问题分析。

 
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