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Orbiting transmitter and antenna for spaceborne communications at ELF/VLF to submerged submarinesAn orbital emplacement for the transmitter and the antenna of a communications link at ELF (30 to 300 Hz) and VLF (3 kHz to 30 kHz) to submerged submarines has been considered since the very inception of the space age. However, only recently has space technology reached a sufficient level of maturity for system designers to undertake serious studies of this link configuration. The optimistic outlook stems from recent space technology developments, such as the design and construction by NASA of long orbiting tethers, and the testing, onboard Shuttle Orbiter ATLANTIS, of the first spaceborne 20 km metal wire. This is known as the Tethered Satellite System-1 (TSS-1), a space mission that might be possibly followed by other flights, with tether lengths that could reach 100 km. Once deployed at a height of, say, 300 km, from a Shuttle Orbiter, or from another suitable platform, a long, thin tether aligns itself along the local vertical by virtue of the gradient of the Earth gravity field. If made of metal, the tether can function as a VED (Vertical Electric Dipole) transmitting antenna at ELF and VLF.
Document ID
19930021566
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bannister, P. R.
(Naval Undersea Warfare Center New London, CT., United States)
Harrison, J. K.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Rupp, C. C.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
King, R. W. P.
(Harvard Univ. Cambridge, MA., United States)
Cosmo, M. L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA., United States)
Lorenzini, E. C.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA., United States)
Dyer, C. J.
(Raytheon Co. Portsmouth, RI., United States)
Grossi, M. D.
(Raytheon Co. Portsmouth, RI., United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1993
Publication Information
Publication: AGARD, ELF(VLF)LF Radio Propagation and Systems Aspects
Subject Category
Communications And Radar
Accession Number
93N30755
Distribution Limits
Public
Copyright
Other
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