Comparison with oblique sounder data of high-latitude h-f propagation predictions from Radar C and Ambscom computer programs. Professional paper for May 1987

Technical Report · Sun Nov 01 04:00:00 EST 1987

OSTI ID:7023518

Dave, N

A study was 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.

• Research Organization: Naval Ocean Systems Center, San Diego, CA (USA)
• OSTI ID: 7023518
• Report Number(s): AD-A-191913/3/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640104 -- Astrophysics & Cosmology-- Solar Phenomena
640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
AURORAE
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
IONOSPHERE
MEASURING INSTRUMENTS
PLANETARY IONOSPHERES
RADAR
RADIATIONS
RADIOWAVE RADIATION
RANGE FINDERS
SHORT WAVE RADIATION
SOLAR ACTIVITY
STARSPOTS
STELLAR ACTIVITY
SUNSPOTS
WAVE PROPAGATION