For charged particles trapped in the geomagnetic field, the frequencies of the mirror oscillations ωm and the azimuthal drift ωd are defined as appropriate averages over the helical motion around the field lines and the mirror motion between reflection points in the two magnetic hemispheres. These integrals for ωm and ωd are evaluated numerically. Results are tabulated, illustrated, and represented by approximate analytical expressions.

Whitten et al. [1965] (hereafter referred to as WPEB) recently inferred values of certain recombination coefficients from an experiment carried out during one of the high‐altitude nuclear tests in 1962. In the experiment, measurements of the angular β‐ray energy flux, dF/dΩ, were made from a rocket that also carried a phase‐coherent three‐frequency beacon. From the measured dF/dΩ, and a theoretical model for the β‐ray energy spectrum at the detector, WPEB infer an electron production rate, q, using their equation 6. From the dispersive Doppler measurements of total electron content between beacon and receiver, with the assumption that horizontal gradients and time dependence of the electron number density are negligible, WPEB infer the electron number density at the rocket position, Ne.

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