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Emergency-Radio Modulation Would Identify Type of VehicleNew emergency beacon similar to conventional one, except modulation interrupted periodically while unmodulated carrier is transmitted. Modulation scheme for emergency radio beacons aids searchers by indicating kind of vehicle in distress. Transmitted signal similar to present standard signal of emergency locator transmitters (ELT's) and emergency position-indicating radio beacons (EPIRB's) but also includes periods of unmodulated carrier.
Document ID
19870000216
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Wren, Paul (NASA Goddard Space Flight Center, Greenbelt, Md.)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 5
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
GSC-12845
Accession Number
87B10216
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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