VLF space transmitter
A practical operational system for communicating with submarines located at high latitudes, particularly those under the ice cap, is described. A 10-20-km dipole is deployed which utilized tether technology and which operated at 1-3 kHz. A pair of hollow-cathode-based plasma sources, establishing co...
| Main Authors: | , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
1989
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| Subjects: | |
| Online Access: | http://ntrs.nasa.gov/search.jsp?R=19890052842 |
| Summary: | A practical operational system for communicating with submarines located at high latitudes, particularly those under the ice cap, is described. A 10-20-km dipole is deployed which utilized tether technology and which operated at 1-3 kHz. A pair of hollow-cathode-based plasma sources, establishing contact between the ends of the tether system and the ambient plasma, allows utilization of the natural dynamo effect of the tether. It is suggested that a 12-satellite constellation in quasi-polar orbit at 500-1000 km altitude could provide coverage for a 4 million sq km area at 75 percent duty cycle. |
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