Is Sir Isaac Newton risen from his grave and come to the Moscow
meeting? Sure looks like he is giving Einstein the boot! We have been
told for years now by Arnold and others, indeed since 1905, that
space and time are linked and should not be separated. Therefore I
prefer the Option 1, where space and time frames are linked.
My algorithm for reading the VOTable has two parts, first a list of spacetime frames that are blessed by the VOEvent document [1], then the algorithm [2] for extracting which table columns have Time, RA, Dec from a point in the frame.
I want to do a SINGLE STRING COMPARISON of space-time frame from the VOTable with space-time frames that I know. I have no interest in picking apart and reassembling the space piece and the time piece. Why have space and time been pulled apart like this?
Roy
[1] Recognizable coordinate frames (for me) are
TT-ICRS-TOPO
UTC-ICRS-TOPO
TT-FK5-TOPO
UTC-FK5-TOPO
TT-ICRS-GEO
UTC-ICRS-GEO
TT-FK5-GEO
UTC-FK5-GEO TDB-ICRS-BARY TDB-FK5-BARY
[2] How to read Option 1 (Einsteinian) representation:
Find a GROUP with utype equal to "stc:AstroCoords.Coord, and Find
it's ID
If I recognize this (see above), then I can understand the coords,
and so:
Find a Field with utype set to
stc:AstroCoords.Time.TimeInstant.ISOTime (this is UTC)
Find a Field with utype set to stc:AstroCoords.Position2D.Value2.C2 (this is RA)
Find a Field with utype set to stc:AstroCoords.Position2D.Value2.C2 (this is Dec)
California Institute of Technology
626 395 3670
Received on 2006-09-20Z20:50:39