The attenuation of radar weather signals by intervening precipitation is difficult to estimate by radar methods. Rainfall rates observed at a point in the path of a storm approximate those along a section through the storm; this is the basis in estimating attenuation frequencies at 3.2 cm wavelength for a summer’s storms at Montreal. It has been found that attenuation along a radar path increases with increasing target intensity: expected attenuation over a 30 mi path at 3 mm hr-1 is 3 db, at 80 mm hr- 1 is 14 db. Power can overcome the limitations imposed by attenuation upon the radar as an indicator of the presence or absence of precipitation. But quantitative observations are difficult; and so attenuation gravely limits the 3.2 cm wavelength radar in a role as a severe-storm indicator.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.112823 |
| Date | January 1960 |
| Creators | Hamilton, Paul. M. |
| Contributors | Marshall, J. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Earth Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
Page generated in 0.0018 seconds