Accession Number : AD0700661

Title :   GLOBAL TIMING SYSTEMS OF NANOSECOND ACCURACY USING SATELLITE references.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Osborne,E. F.

Report Date : OCT 1969

Pagination or Media Count : 189

Abstract : The application of artificial satellites in providing radio reference signals for the synchronization and calibration of local clock and timing systems has been studied. Space technologies in the specific areas of geodesy and navigation are applied with digital signaling techniques and atomic time and frequency standards. The result of the study predicts that a useful operational service can be provided on a global basis with a low-altitude polar satellite having an onboard atomic clock to most effectively satisfy user requirements at various levels of system accuracy. For fixed site users, system accuracies as good as 100 nanoseconds (rms) are realistic with sophisticated equipment and data processing. (Author)

Descriptors :   (*SATELLITES(ARTIFICIAL), TIME SIGNALS), (*TIME, CALIBRATION), ATOMIC CLOCKS, SYNCHRONIZATION(ELECTRONICS), STANDARDS, POLAR ORBIT TRAJECTORIES, ACCURACY

Subject Categories : Test Facilities, Equipment and Methods
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE