(*TEST* flat inverted) --- filter SI, bin 2, night 210727, compared to previous night 210609, sigma = 0.0239 --- (flat / previous inverted)(flat inverted) --- filter B, bin 2, night 210809(flat inverted) --- filter SG, bin 2, night 210803(flat inverted) --- filter SI, bin 2, night 210809(flat inverted) --- filter SR, bin 2, night 210803(flat inverted) --- filter V, bin 2, night 210730
