WARNING: These image quality statistics have not been updated since the Wide Field Upgrade and are no longer maintained.

Current Observing Statistics are available here: https://hydra.as.utexas.edu/?a=help&h=81

HET EE50 and DIMM Image Quality Statistics

To retrieve both HET and DIMM image quality histogram statistics, choose the year and trimester of interest.

Note: HET EE50 image quality statistics have been recorded from the LRS "pre" images since the beginning of 2001. DIMM image quality statistics have been recorded since trimester 2002-1. Dome louvers were installed in trimester 2002-2. Beginning with 2005-2, EE50 have been measured from the FIF guider camera images as well as LRS pre-images.

Year Cycle
(as of Nov-2022 these buttons have been disabled - contact HET operations staff for any assistance required)

NOTE: On these plots the images are often cached by your browser, so looking at several of these can result in your viewing only one loaded before!