(*TEST* flat inverted) --- filter SG, bin 2, night 211027, compared to previous night 211020, sigma = 0.0090 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 211027, compared to previous night 211016, sigma = 0.0238 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SR, bin 2, night 211027, compared to previous night 211019, sigma = 0.0106 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SU, bin 2, night 211027, compared to previous night 211016, sigma = 0.0254 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SZ, bin 2, night 211027, compared to previous night 211016, sigma = 0.0258 --- (flat / previous inverted)