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

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 distr...

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Bibliographic Details
Main Authors: Rider,G. C., Clarke,J.
Other Authors: MARCONI CO LTD CHELMSFORD (ENGLAND)
Format: Text
Language:English
Published: 1983
Subjects:
*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
Component Reports
Oversea paths
Anomalous propagation
Elevated layers
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADP002740
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP002740
Description
Summary: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. This article is from 'Propagation Factors Affecting Remote Sensing by Radio Waves,' AD-A137 559, p29-1-29-12.

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