Table 1.

FP3 SPECTRAL AVERAGES

south pole
Year	Month	Cassini Flyby	Latitudinal bin	Number of spectra	Airmass	Ls (°)
(*) 2012	June	T84	65°S to 75°S	584	1.2	36
2012	September	T86	65°S to 75°S	878	1.5	38
(*) 2013	May	T91	65°S to 75°S	78	1.3	45
2013	December	T97	75°S to 85°S	1077	1.1	52
2014	September	T105	70°S to 80°S	519	1.2	60
north pole
Year	Month	Cassini Flyby	Latitudinal bin	Number of spectra	Airmass	Ls (°)
2013	September	T94	65°N to 75°N	544	1.3	49
(*) 2013	December	T97	70°N to 80°N	1713	1	52
(*) 2014	February	T98	70°N to 80°N	1488	1	54
(*) 2014	September	T105	70°N to 80°N	541	1.8	60
2016	May	T119	65°N to 85°N	780	1.5	78
2016	June	T120	65°N to 85°N	725	1.5	79
2016	August	T122	65°N to 85°N	1072	1.3	82
FP4 SPECTRAL AVERAGES
south pole
Year	Month	Cassini Flyby	Latitudinal bin	Number of spectra	Airmass	Ls (°)
(*) 2012	June	T84	65°S to 75°S	356	1.2	36
2012	September	T86	65°S to 75°S	742	1.4	38
(*) 2013	May	T91	65°S to 75°S	16	1.6	45
2013	December	T97	75°S to 85°S	802	1.1	52
2014	September	T105	70°S to 80°S	1187	1.2	60
north pole
Year	Month	Cassin Flyby	Latitudinal bin	Number of spectra	Airmass	Ls (°)
2013	September	T94	65°N to 75°N	740	1.3	49
(*) 2013	December	T97	70°N to 80°N	854	1.1	52
(*) 2014	February	T98	70°N to 80°N	1397	1.2	54
(*) 2014	September	T105	70°N to 80°N	783	1.8	60
2016	May	T119	65°N to 85°N	957	1.4	78
2016	June	T120	65°N to 85°N	1190	1.3	79
2016	August	T122	65°N to 85°N	735	1.2	82

Notes. Titan high resolution data taken in nadir mode near the south and north pole in focal planes 3 and 4 of the CIRS instrument and analyzed here. Ls is the solar longitude at the time of the observation. The datasets marked with (*) were already included in our 2016 publication but were re-analyzed here with improved calibration.