A Long Range Propagation Experiment to Investigate the Incidence of Anomalous Propagation in the North Atlantic,

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Abstract:

The significance of enhanced range on air to ground paths is reviewed and the paper describes an experiment to collect maximum range data on an oversea path. A Secondary Surveillance Radar sited in the Hebrides was used to observe civil air traffic crossing the North Atlantic, and a cumulative distribution of range extending to 0.1 of the year is presented as a result of 14 months of observation. The modifications made to the radar antenna and display in order to provide sufficient system sensitivity, are described. About 99 of the observations are shown to be satisfactorily modelled by employing an exponential atmosphere with linear N profiles as measured by a suitably sited radio-sonde station, Ocean Weather Ship L, to model the first 1 Km. of height.

Author(s):
Rider, G. C. ; Clarke, J.
Author Organization(s):
MARCONI CO LTD CHELMSFORD (ENGLAND)
Supplementary Note:
This article is from 'Propagation Factors Affecting Remote Sensing by Radio Waves,' AD-A137 559, p29-1-29-12.
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Search radar, *Propagation, *Marine meteorology, North Atlantic Ocean, Stations, Air to surface, Civil aviation, Radar antennas, Sensitivity, Ground level, Radar targets, Radiosondes, Ships, Air traffic, Profiles, Paths, Secondary, Crossings
Keyword(s):
Component Reports, Oversea paths, Anomalous propagation, Elevated layers
Report Date:
1983 Aug 01