Accession Number : AD0709443

Title :   TIME AND FREQUENCY TRANSFER VIA MICROWAVE LINK.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Phillips,D. H. ; Phillips,R. E. ; O'Neill,J. J.

Report Date : 26 JUN 1970

Pagination or Media Count : 18

Abstract : A two-way microwave link between the Naval Research Laboratory and the Navy Observatory has been established to transfer both time and frequency information with high accuracy. Time and frequency information is transmitted simultaneously by algebraically adding together a precision 1 MHz signal and 1 pps, thus providing continuous phase information for frequency comparison and epoch time by the pulse. Phase resolution is better than 10 nanoseconds and determination of epoch time better than 0.1 microseconds. Seven precision standards have been intercompared via the microwave link. Continuous phase recording since September 1969 has shown no diurnal dependence and very little effect due to seasonal and temperature changes. A second microwave link has been established between The Naval Observatory and the Naval Research Laboratory's satellite research communications terminal in Waldorf, Maryland. (Author)

Descriptors :   (*TIME SIGNALS, DATA TRANSMISSION SYSTEMS), FREQUENCY ANALYZERS, MICROWAVE COMMUNICATIONS, STANDARDS, MICROWAVE RELAY SYSTEMS, ACCURACY, NAVAL RESEARCH LABORATORIES, ASTRONOMICAL OBSERVATORIES

Subject Categories : Test Facilities, Equipment and Methods
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE