urn:nasa:pds:context:instrument:steward-kittpeak.bok2m3.90prime 1.0 1.11.0.0 Product_Context 2020-11-09 1.0 Initial export from OLAF urn:nasa:pds:context:telescope:steward-kittpeak.bok2m3 instrument_to_telescope 90Prime Mosaic camera Imager There are four CCDs each with 4032 columns x 4096 rows physical pixels and 20 pixels of overscan for each amp. Each CCD is read out from 4 amplifiers located in each corner Each single amplifier image extension contains data from one amplifier, so it has 2016+20=2032 columns and 2048 rows Current system gain is defined in the image header, and is about 1.5 electrons/DN (Data Numbers) Dark current is ~7 electrons/pixel/hour. Full well is ~90,000 electrons or about the 65k DN ADC 16-bit ADC limit. The CCDs are linear to 65k DN, but stay below about 60,000 DN to be safe. Noise is about 7-8 electrons in the active imaging area in most channels. A few less well behaved channels sometimes measure around 11 electrons. Readout time plus file creating time is 35 seconds. The operating temperature is about -135 C.