(*TEST* flat inverted) --- filter B, bin 2, night 230904, compared to previous night 230903, sigma = 0.0236 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter Bdiff, bin 2, night 230904, compared to previous night 230903, sigma = 0.0251 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter Idiff, bin 2, night 230904, compared to previous night 230903, sigma = 0.0234 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SU, bin 2, night 230904, compared to previous night 230903, sigma = 0.0247 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter ZS, bin 2, night 230904, compared to previous night 230903, sigma = 0.0238 --- (flat / previous inverted)