Extensive ground testing of fight detectors under typical observing conditions. Scan mirror allows rapid modulation of signals so all measurements rely as much as possible on the fast response. Pure fast response has excellent photometric characteristics. Thermal anneal raises detector temperature briefly. Bias boost causes the detector to break down electrically.
Photon flood illuminates it with a bright source.
Raw data frames sent to ground to permit further optimization of reduction. Coadds of adjacent frames can be used to reduce data rate.