... ACS Instrument Handbook . ... Advanced Camera for Surveys Instrument Handbook for Cycle 20 > Chapter 3: Introduction to ACS > 3.3 Instrument Design . ... The nonfunctioning HRC has a 1024 x 1024 SITe CCD, with 21 x 21 µm pixels that provided ~0.028 x 0.025 arcsecond/pixel spatial resolution with critical sampling at 6300 е. This gave the HRC a nominal 29 x 26 arcsecond field of view. ... The ACS design incorporates two main optical channels: one for the WFC, and one which is shared by the HRC and...