Alternate Approaches for Returning Seismic Data from Within the Worldwide Seismological Network to SDAC
Final rept. 15 Jan-21 Dec 1973
COMMUNICATIONS SATELLITE CORP WASHINGTON DC
Pagination or Media Count:
The report presents recommended system configurations for returning seismic data from seismological research stations in Norway NORSAR, Iran, and Korea to the Seismic Data Analysis Center SDAC in Alexandria, Va. The data are to be returned through INTELSAT earth stations in Sweden, Iran, Korea, and U.S., via INTELSAT satellites located over the Atlantic and Pacific Oceans. Three system approaches were considered, viz, 1 use of terrestrial microwave systems from the seismic station to the INTELSAT earth station, and subsequent transmission to the satellite on a standard FM carrier 2 construction of a non-standard earth station at the seismic site for direct access to the satellite using single channel per carrier SCPC or SPADE transmission techniques and 3 the possible use of packet-switching technology by extending the ARPANET to those countries where the seismic sites are located.
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