Accession Number : AD0715893

Title :   An Ionospheric Model for the Arctic.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Gassmann,G. J.

Report Date : 09 OCT 1970

Pagination or Media Count : 17

Abstract : A first order approximation model of the Arctic ionosphere is described, based on published observations and concepts. The model allows for modifications and additions whenever new information becomes available, and will eventually represent a true picture available in real time or even as forecast. The location of the phenomena is specified in corrected geomagnetic latitude and local time. Various input parameters are included whenever some of their influences are known, such as UT, seasons, sunspot number, magnetic variations. The Arctic ionospheric features are specified as 'quasi-instant' deviations from routine predictions whereby the devitations represent probabilities of occurrence during periods that may range from 20 min to 3 hr. The following ionospheric features are more or less covered: auroral E (or night-E), auroral Es (or Esr), HF absorption, Arctic F. Necessary improvements to the model are indicated, including the inclusion of storm-time of individual substorms and the requirement that routine observations be maintained in the midnight sector of the auroral oval. (Author)

Descriptors :   (*IONOSPHERE, MATHEMATICAL MODELS), (*IONOSPHERIC PROPAGATION, *ARCTIC REGIONS), IONOSPHERIC DISTURBANCES, SUNSPOTS, HIGH FREQUENCY, ABSORPTION, AURORAE, MAGNETIC STORMS, PROBABILITY

Subject Categories : Atmospheric Physics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE