(*TEST* flat inverted) --- filter R, bin 2, night 230411, compared to previous night 230328, sigma = 0.0093 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SG, bin 2, night 230411, compared to previous night 230326, sigma = 0.0116 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 230411, compared to previous night 230326, sigma = 0.0133 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SR, bin 2, night 230411, compared to previous night 230326, sigma = 0.0127 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SU, bin 2, night 230411, compared to previous night 230325, sigma = 0.0081 --- (flat / previous inverted)