This package consists of the main subroutine FLDINT and several supporting subroutines. For a given point in space FLDINT determines the magnetic field strength (main and external contributions), the L-value, the minimum field strength along the field line, and the electron drift velocity. The IGS (75) model is used for the internal (core) field and the Olson- Pfitzer model for the external source fields. L-values are obtained by the usual integration procedure along the magnetic field line from mirror point to conjugate mirror point. Different from other L calculation programs, however, FLDINT can modify the mirror points to more accurately represent drift shells of isotropic particle distribution in the drift shell splitting region. The program also flags open field lines inside the auroral oval.
Availability: Please contact model author to inquire about availability of software.
NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility
Last Updated: 12 April 2004 NEP