% assign MOS warp file, version 1 % # This file contains polynomial coefficients which are used by the MOS # assignment code to calculate precise locations in the focal plane. # Blank lines and lines beginning with # are commentary. # The transformation is intended to map out small nonlinearities in the # projection from a purely axial tangent-plane-style to the actual focal plane. # The equations embedded in the code are: # x_out = a0 + x * a1 + y * a2 + xy * a3 + x**2 * a4 + y**2 * a5 # y_out = b0 + x * b1 + y * b2 + xy * b3 + x**2 * b4 + y**2 * b5 # Because the input and output coordinates are given in micrometers, # the dimensions of the A and B coefficients are various powers of [um**(-1)]. # See the file refract.f for most of the full details of the transform. # The number of coefficients for the A and B arrays must be given # on a line which begins as shown below. After that the # specified number of coefficients must follow starting on the next line. # These coefficients were extracted from an input file for the LLNL version # of the code. The file was current as of sometime in the summer of 1995. Number of A warp coefficients: 6 116.680 0.99814037 -0.000684890 8.29116e-09 3.75417e-09 3.46117e-09 Number of B warp coefficients: 6 -145.5673 0.000125097 0.99944579 3.11736e-09 5.00529e-10 7.93622e-09