PROCEDURE: load_wi_sp_mfi PURPOSE: loads WIND MAGNETOMETER 3 second data for "tplot". INPUTS: none, but will call "timespan" if time range is not already set. KEYWORDS: TIME_RANGE: 2 element vector specifying the time range POLAR: Also computes the B field in polar coordinates. DATA: Data returned in this named variable. NODATA: Returns 0 if data exists for time range, otherwise returns 1. GSM: If set, GSM data is retrieved. PREFIX: (string) prefix for tplot variables. Default is 'wi_' NAME: (string) name for tplot variables. Default is 'wi_B3' RESOLUTION: Resolution to return in seconds. MASTERFILE: (string) full filename of master file. SEE ALSO: "make_cdf_index","loadcdf","loadcdfstr","loadallcdf" CREATED BY: Davin Larson FILE: load_wi_sp_mfi.pro VERSION: 1.17 LAST MODIFICATION: 01/07/16