Asymptotic directions and vertical cutoff rigidities for selected cosmic-ray stations as calculated using the Finch and Leaton geomagnetic field model. Environmental research papers

Technical Report · Tue Apr 01 04:00:00 EDT 1975

OSTI ID:7350639

Shea, M A; Smart, D F

Tables of asymptotic directions and vertical cutoff rigidities for a selected set of cosmic-ray stations are presented. These values were obtained by the integration of vertically incident cosmic-ray trajectories through the Finch and Leaton (Epoch 1955) quiescent model of the geomagnetic field. The table of asymptotic directions contains the asymptotic latitudes and longitudes that specify the direction of approach from interplanetary space of a cosmic-ray particle. These asymptotic directions are given for specific rigidities above the main cone cutoff rigidity for each station, and at 0.01 GV rigidity intervals throughout the penumbra. Maps of the asymptotic directions for each station are included. The table of vertical cutoff rigidities contains the geographic coordinates and L value of each cosmic-ray station together with the main cone cutoff rigidity, the Stoermer cutoff rigidity, and the effective cutoff rigidity. (Auth)

• Research Organization: Air Force Cambridge Research Labs., L.G. Hanscom Field, Mass. (USA)
• OSTI ID: 7350639
• Report Number(s): AD-A-012249; AFCRL-TR-75-0177; AFCRL-ERP-502
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics & Cosmology-- Cosmic Radiation
640203 -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CHARGED PARTICLES
COMPUTERS
COSMIC RADIATION
DIGITAL COMPUTERS
GEOMAGNETIC FIELD
INFORMATION
IONIZING RADIATIONS
MAGNETIC FIELDS
MATHEMATICAL MODELS
ORIENTATION
RADIATIONS
SIMULATION
TABLES
THRESHOLD RIGIDITY
TRAJECTORIES