. Author manuscript; available in PMC: 2011 Dec 7.

Published in final edited form as: Int J Remote Sens. 2008 Jun;29(12):3383–3405. doi: 10.1080/01431160701474545

Table 2.

Distance from the city centre and the distribution of AOD and PM data, August to November 2003 (n=number of observations).

Distance from the city centre (°)	AOD				PM (μg m⁻³)
	AOD (5 km spatial resolution)		AOD (10 km spatial resolution)		No. of sites	PM_2.5	PM₁₀
	n	Mean	n	Mean	No. of sites	PM_2.5	PM₁₀
0.1	13	0.664 ± 0.040	3	0.687 ± 0.169	47	75 ± 8	263 ± 40
0.2	39	0.649 ± 0.028	10	0.673 ± 0.048	59	99 ± 17	391 ± 62
0.3	63	0.600 ± 0.020	16	0.634 ± 0.029	7	103 ± 38	380 ± 144
0.4	89	0.576 ± 0.018	22	0.633 ± 0.025		NA	NA
0.5	127	0.545 ± 0.013	62	0.623 ± 0.012		NA	NA
Inside Delhi	55	0.640 ± 0.023	23	0.657 ± 0.025	98	82.9 ± 7.8	304.2 ± 29.8