Jitter and microsteps To deal with bad pixels and to determine the sky level a Jitter pattern of exposures at positions each shifted by a small movement ( 70 sec elapsed time for 60 sec on sky. The 'Observing Strategy' section in 'Observing Setup' section of the Exposure Time Calculator allows you to break a total on-source time down into a number Ndit of individual Integrations, each DIT seconds long, with the Ndit*DIT long Exposures repeated Nexp times with a number of jitters, Njitter, and if required a NxM microstep pattern. |