NAME: scpot_overlay PURPOSE: Overlays a spacecraft potential (or similar line function) over a spectrogram CALLING SEQUENCE: cvar = scpot_overlay(pvar, svar) INPUT: pvar = a tplot variable containing the spacecraft potential svar = a tplot variable containing a spectrogram OUTPUT: cvar = a compound tplot variable name containing the combined spectrum variable with the SC pot overlaid. KEYWORDS: sc_line_color = if set, use this color for SCPOT sc_line_thick = if set, use this line thickness for SCPOT sc_line_style = if set, use this line_style for SCPOT scale_scpot = if set, then scale the scpot to the max and min of the spectrogram y-range use_yrange = if set, scale using the yrange range for the spectrogram, if not set, use min and max of data.v. zero_line = if set, add a line for zero potential HISTORY: 3-sep-2013, jmm, jimm@ssl.berkeley.edu $LastChangedBy: jimm $ $LastChangedDate: 2013-09-10 13:00:16 -0700 (Tue, 10 Sep 2013) $ $LastChangedRevision: 13012 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/general/misc/scpot_overlay.pro $