This function does not execute the pattern. Mosaic moves the telescope through a rectangular pattern. The aim of mosaicing is to systematically cover areas of the sky larger than the detector's field of view. After the pattern is defined, the user is prompted for the number of exposures at each position, the number of iterations of the entire sequence, and whether the program should pause before and after moves, to allow enabling or disabling of the autoguider. Exposures are made according to the parameters in selection one of the data-taking system.
All mosaics begin at the upper left-hand corner of the pattern.
In the latter case, the observer points to the middle of the mosaic, and lets the program automatically move the telescope to the upper left-hand corner, before beginning exposures. Remember that with n coadds selected, each exposure is the sum of n frames. Darks allows the user to make unilluminated dark frames at exposure times equivalent to his or her target frames. An unlimited number of frames, at a maximum of ten different exposure times, may be automatically made. The program prompts for the number of different exposure times, the times themselves, and the number of frames at each exposure time.