(*TEST* flat inverted) --- filter B, bin 2, night 210202, compared to previous night 210113, sigma = 0.0127 --- (flat / previous inverted)(flat inverted) --- filter B, bin 2, night 210202(flat inverted) --- filter SG, bin 2, night 210115(flat inverted) --- filter SI, bin 2, night 210129(flat inverted) --- filter SR, bin 2, night 210115(flat inverted) --- filter V, bin 2, night 210130