PROCEDURE: mvn_swe_sc_pot PURPOSE: Estimates the spacecraft potential from SWEA energy spectra. This routine is EXPERIMENTAL. AUTHOR: David L. Mitchell CALLING SEQUENCE: mvn_swe_sc_pot, potential=dat INPUTS: none - energy spectra are obtained from SWEA common block. KEYWORDS: POTENTIAL: Returns a time-ordered array of spacecraft potentials ERANGE: Energy range over which to search for the potential. Default = [3.,20.] THRESH: Thresholds for testing the spectral shape. The first element sets the minimum value of d(logF)/d(logE). The second sets the minumum value of d2(logF)/d(logE)2. The third element sets the minimum value of the energy shape parameter (used to exclude ionospheric spectra). Default = [0.05, 0.025, 1.8] A smaller value for any of these parameters includes more data and extends the range over which you can estimate the potential, but at the expense of making more errors. PSMO: Smoothing parameter for the derived potentials. Not recommended - the spacecraft potential can change on time scales shorter than the SWEA time resolution. FUDGE: Multiply the derived potential by this fudge factor. (for calibration against LPW). Default = 1. DDD: Use 3D data to calculate potential. Allows bin masking, but lower cadence and typically lower energy resolution. ABINS: When using 3D spectra, specify which anode bins to include in the analysis: 0 = no, 1 = yes. Default = replicate(1,16) DBINS: When using 3D spectra, specify which deflection bins to include in the analysis: 0 = no, 1 = yes. Default = replicate(1,6) OBINS: When using 3D spectra, specify which solid angle bins to include in the analysis: 0 = no, 1 = yes. Takes precedence over ABINS and DBINS. No default, but must have 96 elements. PANS: Named varible to hold the tplot panels created. OVERLAY: Overlay the result on the energy spectrogram. OUTPUTS: none - result is returned via POTENTIAL keyword or as TPLOT variable. $LastChangedBy: dmitchell $ $LastChangedDate: 2014-10-31 14:54:34 -0700 (Fri, 31 Oct 2014) $ $LastChangedRevision: 16110 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/maven/swea/mvn_swe_sc_pot.pro $