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[fitsbits] multiple keyword occurance in header
I have no new suggestions on how to handle "old" FITS files
with multiple keyword occurances, but we might consider a convention to reduce the problem in the future. Such occurances probably occur mostly when histories of previous reduction steps are copied into the headers of downstream products. Originally this kind of information was supposed to be recorded with HISTORY keywords, but I can imagine that many programmers ignore this option because it requires reformatting each card image. Maybe something like BLOCK HISTORY BEGIN .... literal copy of keywords from previous steps ... BLOCK HISTORY END would be useful. Walter |
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