Accession Number : ADB057098

Title :   On the Feasibility of Direct Emergency Spot Broadcast Service from Satellite to Ordinary Ground Receivers.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Lerner, Robert M.

Report Date : 29 DEC 1980

Pagination or Media Count : 42

Abstract : It is feasible with current technology to provide B-grade broadcast service coverage area from a satellite in circular 24 hr (or elliptical 12 hr) orbit to home receivers, without any unusual receiving antenna, in any standard broadcast band for such signals, utilizing on the order of 10 Kw of power and 1000 sq m aperture antenna. Methods are suggested for increasing antenna aperture and prime power by an order of magnitude each, within payload weight constraints, to reach A-grade signal levels. By using modular construction the satellite can be engineered to fail gracefully in the face of natural or manmade environmental hazards. Possible uses include emergency spot broadcasting to areas devastated by flood or storm, entertainment for fishing fleets or armed forces abroad, and spot propaganda broadcast. (Author)

Descriptors :   *COMMUNICATION SATELLITES, *RADIO BROADCASTING, EMERGENCIES, VERY HIGH FREQUENCY, FREQUENCY MODULATION, RADIO SIGNALS, ANTENNA APERTURES, AREA COVERAGE, POWER SUPPLIES, SOLAR PANELS, SURVIVAL(GENERAL), RADIATION HARDENING, RADIO ANTIJAMMING, PHOTOVOLTAIC EFFECT, GALLIUM ARSENIDES.

Subject Categories : Unmanned Spacecraft
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE