Chandra aimpoint monitor

This repo has content related to monitoring and correcting for the drift of the Chandra observing aimpoint related to the temperature-driven alignment changes of the ACA.

The key elements in this repo are:

• aimpoint_mon package which provides tools to monitor the aimpoint drift on a daily basis and update a web page which gets reviewed by the SS&AWG.
• fit_aimpoint_drift_*.ipynb notebooks which are used to fit discrete jumps in the aimpoint following a prolonged dwell at hot temperature (typically normal sun).
• Scripts and notebooks that were used in the analysis of aimpoint offsets and development of the production tools used to implement dynamical aimpoint offsets.
• update_characteristics.py script that was used for an interim period to generate a modified version of the OFLS characteristics file. This was used to remove ACA alignment drift from the target X-ray aimpoint.