One of the many powerful thunderstorms that passed by us this month. This one produced hail just north of the HET.

This week we finally had a break in the stormy weather and started wave front sensor commissioning.  A team from Austin came out and installed an imager and wave front sensor in the IHMP (Input Head Mounting Plate) to calibrate all other wave front sensors on the telescope.  These devices once calibrated will help keep the tracker in perfect alignment with the mirror to optimize the observations we are taking for science.  This will be the main focus for the next month.  Hopefully the weather is more cooperative than it has been.  If you would like to see a time-lapse of some of the recent storms follow this link: https://www.youtube.com/watch?v=shRD2WmPWd4