Portable Clock for Precise Time Transfer

Abstract

The National Physical Laboratory, New Delhi has developed a portable clock which can be autosynchronised with respect to an external clock pulse to a sub-microsecond level. This clock, which can be easily carried on a plane, train or road transport as a personal baggage, can operate for eight hours on a support power pack without the need of 220 V mains power. This paper describes the technical details of this portable clock and quotes the results of different time transfer experiments carried out with it. The precision achieved in these measurements is of the sub-microsecond order. Further utilisation and development of this portable clock are also discussed.

Indexing Terms:

• Portable Clock
• Time Transfer