Mapping Agricultural Frozen Soil on the Watershed Scale Using Remote Sensing Data

Table 3

Description of the RADARSAT-1 images acquired over the Bras d'Henri watershed during the three winter seasons (2003-2004 to 2005-2006) and the reasons for the use of only 12 radar images in this study.

Winter season	Dates of RADARSAT-1 image acquisitions	Use (yes/no)	Reason
	08 November 2003	Yes	Dry snow
	02 December 2003	Yes	Dry snow
	26 December 2003	No	Wet snow surface coinciding with the
			RADARSAT-1 overpass
First	19 January 2004	Yes	Dry snow
	25 January 2004	No	Wet snow surface coinciding with the
			RADARSAT-1 overpass
	29 February 2004	Yes	Dry snow
	02 November 2004	Yes	Dry snow
	06 December 2004	No	Acquisition failures due to the
			conflicts with other users.
	10 January 2005	No	Acquisition failures due to the
Second			conflicts with other users.
	13 January 2005	Yes	Dry snow
	06 February 2005	No	Wet snow surface coinciding with the
			RADARSAT-1 overpass
	14 February 2005	No	Acquisition failures due to the
			conflicts with other users.
	08 January 2006	Yes	Dry snow
	01 February 2006	Yes	Dry snow
Third	25 February 2006	Yes	Dry snow
	21 March 2006	Yes	Dry snow
	14 April 2006	Yes	Dry snow
	08 May 2006	Yes	Dry snow