id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
1381	dvoImagesAtCoords can find coordinates in 2 chips	bills	bills	"dvoImagesAtCoords takes an smf file and a list of ra and dec
values and determines which chip (if any) contain the coordinates.

It does this by transforming the ra and dec to chip coordinates and then comparing that to the extent of the chip.

In certain cases the astrometric solution does not extrapolate well for coordinates far from the chip. Here is an example

dvoImagesAtCoords -astrom /data/ipp016.0/nebulous/7b/cb/267906035.gpc1:ThreePi.nt:2010:03:26:o5281g0257o.151659:SR_o5281g0257o.151659.cm.63547.smf 187.315827 34.006668
1 187.315827 34.006668 XY10
1 187.315827 34.006668 XY65

The correct answer is XY65.

Gene suggests that we change the method that we use to compute the overlap.

Transform RA DEC to ""focal plane coordinates"" using the fpa level transform. Then use the layout of the chips to on the focal plane
to at least get close to the chip. Then use the existing algorithm
to confirm that the coordinates are in the area covered by the chip."	defect	closed	normal		DVO		normal	fixed