rate_dataset::extend_mag_arrays

Source: dataset/rate/rate_dataset__extend_mag_arrays.pro

 EXTEND_mag_ARRAYS
        Extends the data arrays as requested by ACQUIRE_DATA etc.
        Extension is by 20% of current length.

 Call:
        dsref -> extend_mag_arrays, field, times, ndmax

 Arguments: 
        field   float   inout   The field array to extend.
        times   double  inout   The times array to extend.
        ndmax   int     inout   Maximum number of times in data arrays

 History:
        Original after lan rates version: 10/7/00; SJT