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We present approaches to quickly simulate systematics affecting CMBobservations, including the effects of the scanning strategy. Using summaryproperties of the scan we capture features of full time ordered data (TOD)simulations, allowing maps and power spectra to be generated at much improvedspeed for a number of systematics - the cases we present experienced speed upsof 3-4 orders of magnitude when implementing the map-based approaches. Wedemonstrate the effectiveness of the approaches at capturing the salientfeatures of the scan by directly comparing to full TOD simulations - seeingagreement at sub-percent levels of accuracy. We simulate the effects ofdifferential gain, pointing, and ellipticity to show the effectiveness of theapproaches, but note that one could extend these techniques to othersystematics. We finally show how to apply these fast map-based simulations ofsystematic effects to a full focal plane showing their ability to incorporatethousands of detectors as seen in modern CMB experiments.

Fast map-based simulations of systematics in CMB surveys including effects of the scanning strategy