PROCEDURE: swe_3d_snap PURPOSE: Plots 3D snapshots in a separate window for times selected with the cursor in a tplot window. Hold down the left mouse button and slide for a movie effect. This version uses plot3d and spec3d on packaged 3D data. USAGE: swe_3d_snap INPUTS: KEYWORDS: EBINS: Energy bins to plot (passed to plot3d). Default = 16 evenly spaced bins. CENTER: Longitude and latitude of the center [lon, lat]. SPEC: Plot energy spectra using spec3d. UNITS: Units for the spec3d. ENERGY: One or more energies to plot. Overrides EBINS. PADMAG: If set, use the MAG angles in the PAD data to show the magnetic field direction. DDD: Named variable to hold a 3D structure at the last time selected. SUM: If set, use cursor to specify time ranges for averaging. SMO: Set smoothing in energy and angle. Since there are only six theta bins, smoothing in that dimension is not recommended. smo = [n_energy, n_phi, n_theta] ; default = [1,1,1] This routine takes into account the 360-0 degree wrap when smoothing. SYMDIR: Calculate and overplot the symmetry direction of the electron distribution. SYMENERGY: Energy at which to calculate the symmetry direction. Should be > 100 eV. Using the SMO keyword also helps. POWER: Weighting function is proportional to eflux^power. Higher powers emphasize the peak of the distribution; lower powers give more weight to surrounding cells. Default = 2. SYMDIAG: Plot symmetry weighting function in separate window. SUNDIR: Plot the direction of the Sun in SWEA coordinates. LABEL: If set, label the 3D angle bins. KEEPWINS: If set, then don't close the snapshot window(s) on exit. ARCHIVE: If set, show snapshots of archive data. $LastChangedBy: dmitchell $ $LastChangedDate: 2014-10-31 14:15:03 -0700 (Fri, 31 Oct 2014) $ $LastChangedRevision: 16106 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/maven/swea/swe_3d_snap.pro $ CREATED BY: David L. Mitchell 07-24-12