Table 1. List and description of the different studies in the assessment of concepts and theories.

	Autors/s	Radar System	Band/s used	Polarization	Incidence Angle	Study Sites/s	Dominant Vegetation	Saturation Limits(ton/ha)	Remarks
1.	Imhoff, 1993	JPL SAR(AIRSAR)	P-,L-,C-	HH,VV,HV	40° -50°	a)Hawaii b)North America & Europe	a)Tropical broad-leaved evergreen b)Conifers	C-=20 L-=40 P-=100	HV and VHTreated as the same
2.	Souyris et al., 1995	SIR-C/X-SAR	a)L-,C- b)X-	a)HH,VV,HV b)HH,VV	26.4°	Less Landes Forest, France	Pines/conifers	50	-do-
3.	Dobson et al., 1995a	SIR-C/X-SAR	a)L-,C- b)X-	a)HH,VV,HV b)HH,VV	31°	Raco Supersite, Michigan, USA	Broad-leavedHardwoods and conifers	(multi-step approach accurate up to 250 t/ha)	-do-
4.	Dobson et al., 1995b	SIR-C/X-SAR	L-	HH,VV,HV	19° -47°	Raco Supersite, Michigan, USA	Broad-leaved hardwoods & conifers	-	-do-
5.	Hsu et al., 1993	AIRSAR	P-,L-,C-	HH,VV,HV	45°	Les landes Forest, France	Pines/conifers	-	-do-
6.	Dobson et al., 1992	AIRSAR	P-,L-,C-	HH,VV,HV	40° -50°	a)Les Landes forest, France b)Duke forest, USA	Pines/conifers	P- = 200 L-=100	-do-
7.	Karam et al., 1995	AIRSAR	P-,L-,C-	HH,VV,HV			Pines/conifers	-	-do-
8.	Harrel et al., 1995	JERS-1 &ERS-1	L- & C-	HH & VV	45°	Les Landes forest, France	Pines/conifers(White and black spruce)	-
9.	Christensen et al. 1990	AirborneSAR (P-3)	L-	HH,VV,	42° -49°	Duke Forest, USA	Pines/conifers	100
10.	Moghaddam et al., 1994	AIRSAR	P-,L-,C-	HH,VV,HV	35° -50°	Maine, USA	Mixed hardwoods and conifers	200 (for 40°-50°) 300 (for °35) 150 (for 50°)	L-HH data Not available from report
11.	Ranson & Sun, 1994	AIRSAR	P-,L-,C-	HH,VV,HV	25°,35°,50°	Maine, USA	Mixed hardwoods and conifers	157	L-HH datanot available
12.	Ranson et al., 1995	AIRSAR	P-,L-,C-	HH,VV,HV	25°,35°,50°	Maine, USA	Mixed hardwoods and conifers	C-=100, L-=200P-=>200	C-HV data not available