... Two algorithms have been used to simultaneously solve for the sky, gain, and offset for simulated sets of dithered images. ... When solving for sky and gain, achieves machine precision on noiseless data; for noisy data, solution within noise. ... When solving for sky and gain, achieves machine precision on noiseless data; for noisy data, solution slightly different from Fixsen-Arendt solution, but within noise. ... Figure 2: MIPS truth image, and full MIPS dither pattern . ...