Health Check monitor

This is the trending plot for the ISAAC startrace calibrations

The optical position transformation in y-direction between the star in the slit and the spectrum is described by a polynomial:

Y(image) = I1 + I2 * Y(spectrum) + I3 * Y^2(spectrum)

Startrace calibrations are acquired once per year. The image orientation is flipped between LR and MR grating, hence LR and MR coefficients differ. On 2006-01-01 (eclipse to cpl migration of the pipeline) the definition of the polynom has changed for the LR-grating only for reasons of homogenisation.

These plots describe:
Fig. 1. coefficient IL1, the offset in y for LR
Fig. 2. coefficient IL2, linear term in y for LR
Fig. 3. coefficient IL3, quadratic term in y for LR
Fig. 4. coefficient IM1, the offset in y for MR
Fig. 5. coefficient IM2, linear term in y for MR
Fig. 6. coefficient IM3, quadratic term in y for MR
Find more information about ISAAC QC parameters derived from arc lamp frames here.