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Propagation characteristics of 20/30 ghz links with a 40 deg masking angle
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Le, Choung Kantak, Anil V. Davarian, Faramaz |
| Copyright Year | 1994 |
| Description | An effective means of reducing Ka-band propagation loss is the use of high elevation angle paths, i.e., a large masking angle, between earth stations and the space platform. Experimental data have shown that the signal loss associated with most atmospheric effects is inversely proportional to sin(theta), where theta denotes the path elevation angle. A large masking angle and a generous link margin are the primary tools used in the Teledesic Corporation network to minimize atmospheric-related signal outages. This report documents the results of a study sponsored by Teledesic Corporation to characterize the effect of radiowave propagation on Teledesic's links. The recent Olympus campaign in Europe and the U.S. has provided new information that is not included. Therefore, CCIR recommendations and NASA Propagation Handbook models constitute the base of this study, and, when applicable, data from other sources have been used to improve the predictions. Furthermore, attention has been given to data from the Olympus campaign. The effects investigated during this study include gas, rain, fog, sand, and cloud attenuation; diversity gain; scintillation; and depolarization. |
| File Size | 1685506 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950008258 |
| Archival Resource Key | ark:/13960/t4dn92n79 |
| Language | English |
| Publisher Date | 1994-08-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Depolarization Extremely High Frequencies Rain Atmospheric Effects Wave Propagation Atmospheric Attenuation Scintillation Radio Transmission Transmission Loss Satellite Communication Elevation Angle Fog Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
