Accession Number:

ADP002740

Title:

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

Descriptive Note:

Corporate Author:

MARCONI CO LTD CHELMSFORD (ENGLAND)

Personal Author(s):

• Rider,G. C.
• Clarke,J.

Report Date:

1983-08-01

Pagination or Media Count:

12.0

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.

Descriptors:

• *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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE