# PLTMODEL Parameters.

# Image parameters.
ncols,i,h,2048,1,,Number of image columns
nlines,i,h,2048,1,,Number of image lines
ncgrid,i,h,10,1,,Number of grid columns
nlgrid,i,h,10,1,,Number of grid lines

# Linear model parameters.
x_zero,r,h,INDEF,,,X origin in pixels
y_zero,r,h,INDEF,,,Y origin in pixels
xi_zero,r,h,INDEF,,,XI origin in arcseconds
eta_zero,r,h,INDEF,,,ETA origin in arcseconds 
scale,r,h,INDEF,,,Scale in arcseconds / pixel
ratio,r,h,INDEF,,,Ratio of Y to Y scale
xrot,r,h,INDEF,,,X rotation angle in degrees
yrot,r,h,INDEF,,,Y rotation angle in degrees

# Tangent point position.
ra_tan,r,h,INDEF,,,Ra of assumed tangent point in hours
dec_tan,r,h,INDEF,,,Dec of assumed tangent point in degrees

# Tangent point error.
dra_tan,r,h,INDEF,,,Ra error of assumed tangent point in minutes
ddec_tan,r,h,INDEF,,,Dec error of assumed tangent point in minutes

# Tilt error.
tra,r,h,INDEF,,,Ra offset of plate normal
tdec,r,h,INDEF,,,Dec offset of platenormal

# Cubic distortion.
q3ra,r,h,INDEF,,,Ra offset of cubic distortion center in minutes
q3dec,r,h,INDEF,,,Dec offset of cubic distortion center in minutes
q3,r,h,INDEF,,,Cubic distortion coefficient

mode,s,h,'ql'