Trajectory_overview files (.png):
- Data points are every 5 minutes.
- "Plus" symbols: points in orbit *before* perihelion.
- "Dots": points in orbit *after* perihelion. The first "dot" is usually the perihelion.
- White symbols: this part of the trajectory is within the nearside solar hemisphere
- Gray or red symbols: this part of the trajectory is within the farside solar hemisphere.
- The white circle is the solar photospheric limb
- Time labels appear above symbols (dots or plusses) whenever they change color or shape.
- Times are corrected such that they corresponds to the UTC time stamps in the usual solar maps produced by Sun-observing Earth-based and space-based observatories (corrected for time-of-flight, etc).


Other files (.sav):
- "Trajectory_HEEQ_Earth_STEREOAB.sav":
	- 3-D HEEQ positions, and (x,y) projections for Earth, STEREO A and STEREO B observations):
	- (x,y) coordinates (arcsecs from Sun center) are actually corrected (i.e. rotated) for spacecraft roll angle! (In order that they are straightforward to overplot on a map produced by the ssw's mapping utilities.). Need to rotate by the map's roll angle to get "true" solar (x,y).

- "JPL_sol58.sav":
	- Ephemeris as seen from Earth, STEREO-A and STEREO-B, computed from JPL Horizons. Later, I'll compute this from SPICE, once the GEI issue is resolved.