Comparison with oblique sounder data of high-latitude HF propagation predictions from RADAR C and AMBCOM computer programs. Professional Paper for October 1987

Technical Report · Wed Jun 01 04:00:00 EDT 1988

OSTI ID:6610048

Dave, N

A study was done using two High Frequency (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 used for comparison are taken for the Winnipeg-Resolute Bay path in the year 1959 and for the Andoya-Ft. Monmouth and Andoya-College paths in 1964. The data for the Winnipeg-Resolute Bay corresponds to high sunspot number, while the others correspond to low sunspot number. Hence, the 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: 6610048
• Report Number(s): AD-A-197731/3/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
AURORAE
COMPUTER CODES
EARTH ATMOSPHERE
GEOGRAPHICAL VARIATIONS
IONOSPHERE
LATITUDE EFFECT
MEASURING INSTRUMENTS
PLANETARY IONOSPHERES
RADAR
RANGE FINDERS
SOLAR ACTIVITY
STARSPOTS
STELLAR ACTIVITY
SUNSPOTS
VARIATIONS
WAVE PROPAGATION