[Aavso-photometry] GRAS bug

[Kate Hutton]

Just a small heads up ... I noticed something weird on my
Global-Rent-A-Scope data.  When I run a series of exposures on the same
target star one right after the other, the airmass in the fits file header
on the last one in the series was whacko.  I have exchanged some e-mail
today with the GRAS folks & it turns out that the airmass calculation was
based on the position of the telescope at the time the fits file was
written.  By then, the scope is already well on its way to the next star.
They are correcting this bug straightaway.  If you have been using GRAS, you
might care.  If you average all the magnitudes for your series & submit it
with the airmass of the middle one, maybe you won't.

Kate HTN