Observing Time Estimation
T = M N [ Nd * (Nr Tf+ Ts)+ Ts’ ]
- raster with MxN rows and columns
- Nd dithers each raster position
- frame time Tf, Nr repeats each dither
- dither slew Ts=15 sec, raster slew Ts’=50 sec
Recommended values
- Nr ~3 (if Nd=0) or Nr ~1 (if Ndɰ), for cosmic rays
- Nd ɱ for faint sources, esp. 8?m (flat-field limited)