NICS - Distortion

The distortion of the NICS-LF camera can be accurately represented by the following polynomial functions:

Rtrue = Robs*(1 - 0.0055*Robs**2 -0.0072*Robs**4 +0.0021*Robs**6)
Robs = Rtrue*(1 + 0.0055*Rtrue**2 +0.0073*Rtrue**4 -0.0018*Rtrue**6)

where Rtrue and Robs are the true and observed radial distances from the array center normalized to unity at the array edges, i.e.

Robs = sqrt ( (xobs-512)**2 + (yobs-512)**2) )/512
Rtrue = sqrt ( (xtrue-512)**2 + (ytrue-512)**2) )/512

Credits to F. Mannucci, L. Hunt & J. Licandro.

For any comments please contact Francesca Ghinassi.