Definitions or calculations with GAIN and SATUR_LEVEL are wrong - Printable Version +- AstrOmatic forum ( https://www.astromatic.net/forum)+-- Forum: AstrOmatic software ( /forumdisplay.php?fid=3)+--- Forum: SkyMaker ( /forumdisplay.php?fid=19)+--- Thread: Definitions or calculations with GAIN and SATUR_LEVEL are wrong ( /showthread.php?tid=969) |

Definitions or calculations with GAIN and SATUR_LEVEL are wrong - bmv - 07-13-2014 11:59
Definitions or calculations of GAIN and SATUR_LEVEL are wrong From: http://www.stsci.edu/hst/acs/documents/handbooks/currentDHB/acs_Ch42.html Quote: 4.1.2 A-to-D Conversion Let's make two experiments: 1) Small GAIN GAIN 0.01 # gain (e-/ADU) WELL_CAPACITY 0 # full well capacity in e- (0 = infinite) SATUR_LEVEL 65535 # saturation level (ADU) READOUT_NOISE 1.0 # read-out noise (e-) Level of digital saturation limit has to be GAIN*SATUR_LEVEL=655.35 e- On the model image it always 65535 2) Large GAIN GAIN 100 # gain (e-/ADU) WELL_CAPACITY 0 # full well capacity in e- (0 = infinite) SATUR_LEVEL 65535 # saturation level (ADU) READOUT_NOISE 1.0 # read-out noise (e-) Level of digital saturation limit has to be GAIN*SATUR_LEVEL=6553500 e- On the model image it always 65535 3-4) Same for RON on model image For Small GAIN Resultant noise in e- has to be small, and for Large GAIN noise in e- has to be small. At present all on the contrariwise. Everything higher told truly for the following definitions: GAIN - gain (e-/ADU) SATUR_LEVEL - saturation level (ADU) |