Alternate Approaches for Returning Seismic Data from Within the Worldwide Seismological Network to SDAC

Abstract

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
AD0779930

Entities

People

  • Jorge Fuenzalida

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Acquisition
  • Artificial Satellites
  • Coding
  • Computer Programming
  • Contracts
  • Data Links
  • Data Rate
  • Data Transmission
  • Digital Data
  • Microwaves
  • Modems
  • Pacific Ocean
  • Packet Switching
  • Processing Equipment
  • Radio Equipment
  • Standards
  • West Virginia

Fields of Study

  • Environmental science

Readers

  • Seismology
  • Tactical Satellite Communications Systems Engineering.

Technology Areas

  • Space
  • Space - Orbital Debris
  • Space - Satellites