The calculation of riometer absorption and an approximation connection between riometer absorption and solar proton fluxes during nighttime PCA events. Environmental research papers

Technical Report · Fri Sep 05 04:00:00 EDT 1975

OSTI ID:7333748

Stroscio, M A; Sellers, B

The calculation of riometer absorption during several PCA events of particular interest is presented. These calculations are based on earlier work in which an improved effective recombination coefficient was derived and an atmospheric model for each month of the year, day and night, and 60/sup 0/ N and 90/sup 0/ N latitude was presented. In this report, the calculated values of riometer absorption are presented for 5 PCA events: 2 Nov. 69, 7 Mar. 70, 25 Jan. 71, 2 Sep. 71, and 3 Aug. 72. The calculated values of riometer absorption are compared with experimental values measured for both day and night conditions at Thule, Greenland. An approximate connection between riometer absorption and the square-root of the proton flux for nighttime conditions is presented. This relationship, which has previously been applied only for daytime conditions, is discussed both on a fundamental level and on the level of verification by comparison with experiment. In addition, the basic equation widely used to calculate riometer absorption is compared with the original Sen-Wyller result. (GRA)

• Research Organization: Air Force Cambridge Research Labs., L.G. Hanscom Field, Mass. (USA)
• OSTI ID: 7333748
• Report Number(s): AD-A-019656; AFCRL-TR-75-0469; AFCRL-ERP-531
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
BARYONS
CORRELATIONS
DAILY VARIATIONS
EARTH ATMOSPHERE
ELEMENTARY PARTICLES
FERMIONS
FLUX DENSITY
GREENLAND
HADRONS
IONOSPHERE
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUCLEONS
POLAR-CAP ABSORPTION
PROTONS
RADIATIONS
RECOMBINATION
RIOMETERS
SOLAR PARTICLES
SOLAR PROTONS
SOLAR RADIATION
STELLAR RADIATION
VARIATIONS
WAVE PROPAGATION