can be extended to improve the calibration procedure and the RV accuracy.

Degeneracy in the model
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The effect of degeneracy in the model for estimating the positional variations is also evaluated to verify the credibility of the model matching. As part of this analysis, optical components are perturbed with a known value. The system is optimized to bring the components back to the nominal position. We then estimated the difference in predicted vs actual (perturbed) positions. Table \[tab:degeneracy\] shows that the degeneracy present in the system is minimal compared to the accuracy we are targeting in model matching (0.01 degree). The uncertainties in positioning the components in the spectrograph are to a range of 0.01 degree. The spectrum that is used as the input to the model is obtained from the spectrograph and is not a synthetic spectrum. Thus some inherent noise is expected in the spectrum even after the initial data reduction was carried out using IRAF. However, to evaluate the uniqueness of the model in predicting the perturbations of the optical components, we have added noise in the spectrum. The radial velocity error obtained in the comparison of the noise added spectrum to the original spectrum is 