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In the four sections of this form, select the appropriate astronomical source, telescope and instrument configuration, observing conditions, and observation parameters. Click on the calculate button (calculate button) at the bottom of any section to submit the parameters from all the sections to the server or the reset button (reset 
button) to reset all parameters to their defaults. The results are reported in a separate web page that can be resized and printed.

See the ITC Help for general guidance on use of the Integration Time Calculators, and the (more info) links for specific help on each section of the form.

In the GSAOI ITC, the Strehl is estimated automatically based on selected filter and image quality, using the Strehl values measured for different filters and seeing conditions reported in the GeMS performance web page (see also Defining the CANOPUS AO WFS stars and the GSAOI OT web pages for details).

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Gemini Observatory Participants