I am trying to mosaic four bands of the same spatial extent, each one has no data as NaN, and good data as float. Each area with data was masked before , and now (after certain operations on the good data) I am trying to put them back again (If all NaN areas were put together, they complete the image). Mosaic resulted is always a NaN image . I set the data ignore value as NaN. How can I get the data values instead?Tried to add these four bands (band math), still the result is the same. Is there another way around? Or is there something missing in what I am doing?Thanks