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where the weights w and merits M are drawn from multiple considerations. We'll tune values of M to range from 0 to 1, where they saturate.
Atan merit function for tau1=45 and tau2 values of 1 (red), 5 (black) and 10 (blue) days.
This FOM is computed per field, per passband, for each potential observation. We can also introduce a couple of penalties:
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