Figure 2.12 shows the parameters for the DCS data collection technique. This is the way in which the peak-up arrays were read for the purposes of IRS Peak-Up Acquisition (PUA). Following an initial series of bias boost and reset frames, each pixel was sampled. The total time required to sample every pixel in the array is the frame time. Several successive spins through the array were then carried out in which each pixel was accessed but not sampled. (Note that the frame time and the spin time are equal). After a specified number of spins, the pixels were again sampled, and the difference between the two samples at each pixel was saved and stored as an image. Each DCS mode sub-exposure generated a single 128x128 16-bit image.
Figure 2.12: Double Correlated Sampling (DCS) data collection technique.
