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2. What is the fundamental difference between a CCD and a JWST detector readout?
- JW detector uses the MULTIACCUM readout method that reads and records individual pixel signal multiple times during an exposure, recording how wthe pixel charge/signal increases with time (as opposed to CCD that only reads out at the end of an exposure).
3. What is a frame?
A single read of all pixels in the detector array or subarray
4. What is a group?
on-board average of one or multiple frames
5. What’s the meaning of “group gap” or “dropframes” in the JWST NIR detectors?
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