Standard time and frequency signal broadcast via INSAT-accuracy improvements using differential mode

Author

Gupta, A. Sen ; Mathur, B.S.

Author_Institution

Nat. Phys. Lab., New Delhi, India

Volume

46

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

212

Lastpage

215

Abstract

We describe the standard time and frequency signal (STFS) broadcast via the INSAT satellite and its use in accurate time synchronization and frequency calibration anywhere in India. Under normal operation it is possible to achieve a synchronization accuracy of better than ±20 μs. For users with higher accuracy requirements we discuss the capability of the STFS broadcast to provide time synchronization with an accuracy better than 1 μs using a mode of operation which we call differential STFS. Here we further correct the error residuals in the received STFS using data from a reference station collocated with the uplinking site. Both analytical and actual experimental data are presented

Keywords

calibration; direct broadcasting by satellite; error correction; measurement standards; synchronisation; time measurement; INSAT satellite; India; accuracy improvement; differential STFS; differential mode; error residual correction; frequency calibration; reference station; standard time/frequency signal broadcast; synchronization accuracy; time synchronization; uplinking site; Calibration; Decoding; Error correction; Frequency synchronization; Microprocessors; Propagation delay; RF signals; Radio broadcasting; Satellite broadcasting; Satellite ground stations;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.571815

Filename

571815