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This program comprises basic tests for measuring the read noise and dark current of the ACS WFC and for tracking the growth of hot pixels. The recorded frames are used to create bias and dark reference images for science data reduction and calibration. This program will be executed on Monday comma Wednesday comma and Friday of each week. To facilitate scheduling comma this program is split into three proposals. This proposal covers 216 internal orbits (4 orbits-day x 54 days) from 28 Jun 2021 to 29 Oct 2021.