TEMPORAL COVERAGE OF THE ESSW AVHRR COLLECTION

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There are 6,645 time intervals associated with items in the ESSW AVHRR collection as of November 26, 2002. The number of time intervals may differ from the number of items because each item in the collection can have zero, one, or more than one associated time interval. Typically, items have one associated time interval.

The temporal coverage of the time intervals is graphically shown by the histogram below. Each red spike represents a month; each green/yellow bar, a year. The height of a spike or bar reflects the number of time intervals that overlap that time period.

The following table shows the temporal coverage numerically. The cells in the “Overall” column represent years; the cells to the right of a year represent individual months within that year. The value in a cell is the number of time intervals that overlap the year or month represented by that cell.

		Overall	Month in year
			1	2	3	4	5	6	7	8	9	10	11	12
Year	1995	20	0	0	20	0	0	0	0	0	0	0	0	0
	1996	3	0	0	0	0	0	0	0	0	0	0	3	0
	1997	0	0	0	0	0	0	0	0	0	0	0	0	0
	1998	1625	162	78	156	202	217	204	169	213	224	0	0	0
	1999	948	0	0	0	0	0	95	14	166	166	174	164	169
	2000	1818	161	155	158	151	162	160	160	152	138	112	151	158
	2001	1608	157	135	150	138	75	170	148	150	114	143	115	113
	2002	623	120	108	118	113	117	47	0	0	0	0	0	0