Table 1.

Site description

Site	Lat, oN	Long, oW	Solar zenith angle at AVIRIS flight, °	Description	No. 20 × 20-m plots	Mean (SD) over plots
						NDVI*	%N
Austin Cary Memorial Forest † , FL	29.75	82.20	25.89	Planted and natural pine	4	0.72 (0.01)	0.90 (0.05)
Bartlett Experimental Forest ‡ , NH	44.05	71.28	33.16	Mixed northern hardwood	13	0.88 (0.03)	1.52 (0.42)
Duke Forest § , NC	35.97	79.09	33.19	Pine, pine–hardwood, upland hardwood, and bottomland hardwood	16	0.88 (0.04)	1.57 (0.40)
Harvard Forest ¶ , MA	42.54	72.17	35.11	Mixed temperate forest	19	0.89 (0.02)	1.77 (0.29)
Howland Forest ║ , ME	45.20	68.74	35.59	Boreal-northern hardwood transitional forest	18	0.87 (0.01)	1.02 (0.10)
Wind River Experimental Forest**, WA	45.82	121.95	25.22	Temperate evergreen	15	0.86 (0.03)	1.10 (0.22)

Lat, latitude; long, longitude.

*NDVI is defined here as the difference between AVIRIS plot BRFs in the nadir direction at 855 nm and 655 nm normalized by their sum.

^† http://sfrc.ufl.edu/handbook/acf.html.

^‡ www.fs.fed.us/ne/durham/4155/bartlett.htm.

^§ www.dukeforest.duke.edu/.

^¶ http://harvardforest.fas.harvard.edu/.

^║ http://howlandforest.org/.

**www.fs.fed.us/pnw/exforests/wind-river/index.shtml.