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(Stephens) I think they should stay in all the headers. The idea is that each extension can stand alone if necessary and have the relevant keywords. The only reason to leave them in the primary header is for
informational purposes. i.e. you just have to read the primary header and you know what the file is about.
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(Stephens) The GLAST data as planned to be distributed does not have pointings in the traditional sense
and there will be a lot of data that doesn't correpsond to a proposal from the GI program. The RA_SCX, DEC_SCX, RA_SCZ, DEC_SCZ keywords are mostly meaningless for the data as the spacecraft is constantly moving. The center of the "field of view" for the data extraction is already identify by the Data
Subspace Selection (DSS) keywords. It would be possible and might be of use to duplicate this in the
OBJECT keyword but I think the OBS_ID keyword would go away.
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(Stephens) Actually I thought this was a flag like the old PSR_COLS keyword and indicated that there
were additional MC columns in the file. As we don't use this I think it can go away.
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