(*TEST* flat inverted) --- filter I, bin 2, night 230402, compared to previous night 230401, sigma = 0.0041 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 230402, compared to previous night 230401, sigma = 0.0042 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter V, bin 2, night 230402, compared to previous night 230401, sigma = 0.0044 --- (flat / previous inverted)