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Paul, I don't fully understand why the halos are so strong ... I suspect that it is something to do with intense stretching of the amplitudes to pull out the wanted signal which is barely detectable on top of the bright sky glow. I suspect the halos would be weaker if the data were recorded at a dark sky site. I can go 4x times deeper at Wiruna versus the darkest part of the sky above my home located ~30 km from the Sydney GPO. I guess I should repeat the imaging run with the same gear at Wiruna one day to test the hypothesis.
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