FRONTAL PERTURBATION OF A TROPOSPHERIG SCATTER PATH
A 2-year study of 500 Mc/s radio transmissions over an 85-mile path near Ottawa has shown that the signal fading rate rises well above the diurnal maximum when the transmission path is perturbed by a weather front. The fading rate reaches a maximum when the upper boundary of the frontal zone is 3000...
| Published in: | Canadian Journal of Physics |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1959
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/p59-145 http://www.nrcresearchpress.com/doi/pdf/10.1139/p59-145 |
| Summary: | A 2-year study of 500 Mc/s radio transmissions over an 85-mile path near Ottawa has shown that the signal fading rate rises well above the diurnal maximum when the transmission path is perturbed by a weather front. The fading rate reaches a maximum when the upper boundary of the frontal zone is 3000 feet above the center of the radio path, and the fading rate remains high as long as any part of the frontal zone is between the surface and 3000 feet. A similar relationship between frontal position and signal fading rate is found for Arctic, Maritime, or Polar fronts in the Ottawa area, but the Arctic fronts provide the clearest definition. There is some indication that high fading rate also may be associated with horizontal layers of contrasting humidity at low levels in the troposphere. |
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