(*TEST* flat inverted) --- filter SG, bin 2, night 211027, compared to previous night 211015, sigma = 0.0138 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 211027, compared to previous night 210918, sigma = 0.0210 --- (flat / previous inverted)
(flat inverted) --- filter B, bin 2, night 211021
(flat inverted) --- filter SG, bin 2, night 211015
(flat inverted) --- filter SI, bin 2, night 211027
(flat inverted) --- filter SR, bin 2, night 210927
(flat inverted) --- filter V, bin 2, night 211022