We describe a new method for calculating geomagnetic cutoffs that incorporates obliquely incident primaries, and we use it to interpret a sea level neutron monitor latitude survey. Effects due to obliquely incident primaries are significant and may be responsible for anomalies observed in this and other latitude surveys. We define an "apparent" cutoff that takes these obliquely incident particles into account. Use of our apparent cutoff in a Dorman function fit to the 1994-1995 Bartol Research Institute-University of Tasmania latitude survey data results in a significant improvement over use of the more conventional effective vertical cutoff. Copyright 1997 by the American Geophysical Union.

Item Type:	Refereed Article
Research Division:	Physical Sciences
Research Group:	Astronomical and Space Sciences
Research Field:	High Energy Astrophysics; Cosmic Rays
Objective Division:	Expanding Knowledge
Objective Group:	Expanding Knowledge
Objective Field:	Expanding Knowledge in the Physical Sciences
Author:	Hall, D (Ms Dana Hall)
Author:	Humble, JE (Dr John Humble)
Author:	Duldig, ML (Dr Marc Duldig)
ID Code:	12541
Year Published:	1997
Web of Science® Times Cited:	48
Deposited By:	Physics
Deposited On:	1997-08-01
Last Modified:	2011-11-07
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