Table 1.

Summary characteristics of satellite level-1 data used.

Sensor	Date range used (year/month/day)	Typical local time of observation	0.6 μm	0.8 μm	1.6 μm	3.7 μm	11 μm	12 μm
AVHHR-7	1981/08/24 to 1985/02/18	15.00 h*	Y	Y	N	Y	Y	Y
AVHRR-9	1985/01/04 to 1988/11/07	15.00 h*	Y	Y	N	Y	Y	Y
AVHRR-11	1988/10/12 to 1994/09/13	15.00 h*	Y	Y	N	Y	Y	Y
AVHRR-12	1991/09/16 to 1998/12/14	07.00 h*	Y	Y	N	Y	Y	Y
ATSR-1	1991/11/01 to 1996/01/09	10.30 h	N	N	2Y	2Yf	2Y	2Y
AVHRR-14	1995/01/19 to 1999/12/31	15.30 h*	Y	Y	N	Y	Y	Y
ATSR-2	1995/08/01 to 2003/06/22	10.30 h	N§	N§	2Y	2Y	2Y	2Y
AVHRR-15	1998/09/24 to 2009/12/31	06.00 h*	Y	Y	N	Y	Y	Y
AVHRR-17	2002/07/10 to 2009/12/31	10.00 h*	Y	Y	Yd	Yn	Y	Y
AATSR	2002/07/24 to 2012/04/08	10.00 h	2Y	2Y	2Y	2Y	2Y	2Y
AVHRR-16	2003/06/01 to 2006/12/31	16.00 h*	Y	Y	Yd	Yn	Y	Y
AVHRR-18	2005/06/05 to 2009/12/31	13.30 h*	Y	Y	Yd	Yn	Y	Y
AVHRR-19	2009/02/22 to 2016/12/31	13.30 h*	Y	Y	Yd	Yn	Y	Y
AVHRR Metop-A	2006/11/21 to 2016/12/31	09.30 h	Y	Y	Yd	Yn	Y	Y

For some sensors the date range used is less than the period of data delivery, because data used has been truncated for quality reasons. The local time of observation varies significantly for sensors whose indicative time is marked with an asterisk (*). Y or N refers to the presence/use of a waveband. 2Y indicates dual-view observation at a waveband (near-nadir and slanted along track). § indicates that data availability over the oceans was restricted and the channel was not used. Some channels are provided only for day or night scenes (with variations in regards to which is available for twilight scenes), which is indicated by Yd and Yn respectively. The ATSR-1 channel marked 2Yf failed early in the mission, but is used where present.