Table 3 Fit to the IEST-STD-CC 1246E cleanliness standard for each of the locations. The cleanliness level is given by L. Also indicated is the fractional area coverage f of the particles on the glass surface.

City	L at 100×	L at 500×	f at 100×	f at 500×	# of particles at 100×	# of particles at 500×	R² at 100×	R² at 500×	RMSE at 100×	RMSE at 500×
Chennai, India	1096	1154	0.21	0.25	14748	6794	0.99	0.98	0.142	0.110
Golden, CO	856	881	0.08	0.15	8512	9373	0.99	0.93	0.228	0.281
Jaén, Spain	1010	1145	0.16	0.26	19209	9445	0.99	0.93	0.130	0.238
Penryn, UK	684	670	0.02	0.06	2612	5845	0.86	0.79	0.372	0.385
San José, CA	872	1169	0.06	0.21	6116	7324	0.98	0.86	0.125	0.388
Tezpur, India	1167	1193	0.16	0.32	14423	8832	0.98	0.98	0.266	0.130

Quick links

Search