a few more heliocentric coordinate systems

[Elizabeth Auden]

Hi again,

Chris Perry has brought to my attention some additional heliocentric
coordinate systems that should also be included in a solar metadata
extension to VODataService:

(From
http://www.space-plasma.qmw.ac.uk/heliocoords/systems2art/node8.html):

1. /Coverage/Spatial/CoordFrameType/Spherical
2. /Coverage/Spatial/CoordFrameType/Cartesian
3. /Coverage/Spatial/CoordFrameType/GeocentricEquatorialInertial
4. /Coverage/Spatial/CoordFrameType/Geographic
5. /Coverage/Spatial/CoordFrameType/Geodetic
6. /Coverage/Spatial/CoordFrameType/Geomagnetic
7. /Coverage/Spatial/CoordFrameType/GeocentricSolarEcliptic
8. /Coverage/Spatial/CoordFrameType/GeocentricSolarEquatorial
9. /Coverage/Spatial/CoordFrameType/GeocentricSolarMagnetospheric
10. /Coverage/Spatial/CoordFrameType/SolarMagnetic

11. /Coverage/Spatial/CoordFrameType/Heliographic
12. /Coverage/Spatial/CoordFrameType/SolarRotations
13. /Coverage/Spatial/CoordFrameType/HeliocentricEarthEcliptic
14. /Coverage/Spatial/CoordFrameType/HeliocentricEartEquatorial
15. /Coverage/Spatial/CoordFrameType/HeliocentricInertial
16. /Coverage/Spatial/CoordFrameType/HeliocentricOfDate

Please let me know if you can advise other solar / STP coordinate systems
that should be included in a schema extension.

cheers,
Elizabeth