[daip] ISPEC bug when using outprint and ZINC=-1

[Lincoln Greenhill]

Hi Eric,

31DEC03 AIPS. RH9.0 LINUX.

When I dump ISPEC data to a text file and also reverse the axis with
zinc=-1, the first column in the text file is not calculated correctly.  
I think the problem is with the sign of the channel increment not taking
into account the value of zinc. In effect, the column's values are flipped
around the reference pixel.

This used to be a problem as well for POSSM (c. 2000) when spectra were
dumped to text files. I believe one of our students reported the POSSM bug
to NRAO.  However, to be safe, I mention it here, in the event it fell
between the cracks.

Regards,

Lincoln




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Lincoln J. Greenhill               Harvard-Smithsonian Center for Astrophysics
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