Comparison with Oblique Sounder Data of High-Latitude HF Propagation Predictions from 'Radar C' and 'AMBSCOM' Computer Programs.

A study is done using two HF propagation prediction programs - Radar C and AMBCOM - to determine how well they predict median values of oblique sounder data of maximum observed frequencies (MOF) at high latitudes. The main differences between RADAR C and AMBCOM are the inclusion in the latter of hig...

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Bibliographic Details
Main Author: Dave, Nikhil
Other Authors: NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA
Format: Text
Language:English
Published: 1987
Subjects:
Computer Programming and Software
Radiofrequency Wave Propagation
*COMPUTER PROGRAMS
*HIGH FREQUENCY
*HIGH LATITUDES
*PROPAGATION
*RADIATION ABSORPTION
AURORAE
IONOSPHERE
MODELS
PATHS
PREDICTIONS
RADAR
RAY TRACING
SOUNDING
SUNSPOTS
WUDN587609
Resolute Bay
Online Access:http://www.dtic.mil/docs/citations/ADA191913
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA191913
Description
Summary:A study is done using two HF propagation prediction programs - Radar C and AMBCOM - to determine how well they predict median values of oblique sounder data of maximum observed frequencies (MOF) at high latitudes. The main differences between RADAR C and AMBCOM are the inclusion in the latter of high-latitude ionosphere and auroral absorption models, as well as a more sophisticated and accurate ray-tracing scheme. The data for the Winnipeg-Resolute Bay corresponds to high sunspot number, while the others correspond to low sunspot number. Hence, this study provides information on the performance of the two programs for various high-latitude paths at both high and low sunspot number. AMBCOM was found to give generally better agreement with the above data than did RADAR C. Comparison of details of model predictions from the two computer programs for the above data-base is used to form an understanding of this improvement in prediction capability.

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