Accession Number : AD0464355


Title :   ANALYSIS OF SATELLITE TIME DATA


Corporate Author : JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB


Personal Author(s) : Guier, W H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/464355.pdf


Report Date : Jan 1964


Pagination or Media Count : 23


Abstract : Satellites 1961 omicron 1, 1961 alpha eta 1, and 1962 beta mu 1 are instrumented to supply time data as well as doppler data. Satellite time markers are generated in these satellites by counting down the satellite's stable oscillator and producing a unique modulating on the doppler carriers each time a fixed number of oscillator cycles have occurred. The TRANET doppler receiving stations are equipped to recognize this modulation and to automatically punch (on the same paper tape that doppler data is punched) the station's time (WWV) at which this special modulation is received. After appropriate calibration, this time data can serve as a secondary time standard. This report presents the information required to recognize and process satellite time data and to determine the WWV time at which the satellites transmitted satellite time markets.


Descriptors :   *SCIENTIFIC SATELLITES , REAL TIME , TIME , MATHEMATICAL ANALYSIS , TELEMETERING DATA , EQUATIONS , TIME SIGNALS , RADIOFREQUENCY OSCILLATORS , DATA PROCESSING , MARKERS


Subject Categories : Unmanned Spacecraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE