【摘 要】
：
K-band ranging system and GNSS receiver are the key payloads of the gravity exploration satellite which employs LEO satellite tracking LEO satellite technology.Ultra-stable crystal oscillator,providin
【机 构】
：
No.504 Chang'an Eastern Street, Xian National Civil Aerospace Industrial Base-710100 P.R. China
论文部分内容阅读
K-band ranging system and GNSS receiver are the key payloads of the gravity exploration satellite which employs LEO satellite tracking LEO satellite technology.Ultra-stable crystal oscillator,providing precise inter-satellite distance measurement with clock frequency reference,is the key component of the KBR-GNSS system.Therefore,real-time and dynamic monitoring on-orbit USOs frequency stability is very necessary.First of all,the analysis formula of DOWR with time-tag corrected is deduced based on the study of the KBR-GNSS measuring principle.Secondly,the coupling relationship between Allan variance formula and inter-satellite time difference is analyzed deeply.Two methods of inversing USO Allan variance are proposed,of which one is using inter-satellite time difference measurement and another one is employing inter-satellite distance measurement.Finally,referring to GRACE satellite payload scheme,a set of KBR-GNSS system is developed.Using this test system,the effectiveness of the two algorithms is validated and their advantages and disadvantages are compared.The research results of this paper have some reference to the design of inter-satellite ranging system of Chinese first generation earth gravity exploration satellite.
其他文献
Autonomous navigation using an inter-satellite ranging and communication with inter-satellite links (ISL) is the trend of satellite navigation system development.By controlling the direction of phased
With the continuous promotion of Beidou satellite navigation applications,the pace of city market accelerate,and how to improve the navigation terminal performance is a hot issue under city environmen
Integer ambiguity resolution is one of the difficult and important points in precision relative positioning.As we all known,LAMBDA (Least-squares AMBiguity Decorrelation Adjustment) method can be rega
This paper reviews the history and evolution of the relative positioning based on the un-differenced (UD) observation.The internal mechanism of this method is explained by error division,that is,adopt
At present,the X-ray pulsar-based technology is on the step of space verification.It is badly in need of the deep analysis of the craft-carried detectors performance.In addition,the developing departm
With the development of International GNSS Service (IGS) real-time pilot project (RTPP),acquiring Precipitable Water Vapor (PWV) with high accuracy has become a reality based on the real-time Precise
The correction effect of ionosphere delay is a crucial factor in determining availability,accuracy,reliability and other key performance indicators of satellite navigation and positioning services.To
The preparation of atomic hydrogen has a significant effect on the operation of the hydrogen maser.The paper presents radio frequency (RF) discharge source and discharge bulb as the necessary conditio
RF signal of traditional real road test system for BDS user terminal is usually unrepeatable while the system is complex and expensive.In this paper,an economic and signal-replicable BDS user terminal
Compared with the qualitative analysis,the quantitative analysis of VTEC (vertical total electron content) is more conducive to the modeling,fore-casting and correcting of ionosphere delay.With Empiri