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Amplitude fading of simultaneous transionospheric l-band and vhf signals received at the geomagnetic equator
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sessions, W. B. |
| Copyright Year | 1972 |
| Description | At Ancon, Peru, simultaneous observations of 1550-MHz and 136-MHz signals from the ATS 5 and Intelsat-1 spacecraft showed ionospheric fading as great as 27 db at 136 MHz and 6 db at 1550 MHZ. The observations were made on 48 days during the 1970 autumnal and 1971 vernal equinox periods. Comparison of the two frequencies, in respect to rates and depths of fades, is made. Statistical distributions of the received signal levels during ionospheric scintillation occurrences are presented which may be of use to communications system engineers with operational requirements in the equatorial regions. The distributions show that during expected periods of scintillation, the L band signal typically falls 1.1 db below the median for 1.0 percent of the time, and the VHF signal falls 11.5 db below the median for 1.0 percent of the time. |
| File Size | 2161947 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730001489 |
| Archival Resource Key | ark:/13960/t9p31ng5f |
| Language | English |
| Publisher Date | 1972-06-01 |
| Access Restriction | Open |
| Subject Keyword | Ultrahigh Frequencies Statistical Distributions Intelsat Satellites Very High Frequencies Equatorial Orbits Satellite Observation Scintillation Earth Ionosphere Ats 5 Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
