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B
Shear line
B
C
C
D
D
A
A
C-band ERS-1
L-band JERS-1
Figure 9.2 Comparison between C‐band ERS‐1 (VV) and L‐band JERS‐1 (HH) of a sea ice scene near the east
coast of Greenland acquired on 7 January 1994. Ridges and brash ice are more accentuated in the JERS‐1 image
in zone C. The shear zone (D) is also more visible in the JERS‐1 image. The width of the images is about 50 km
and the pixel spacing 100 m. ERS‐1 image © ESA, JERS‐1 image © JAXA [ Dierking and Busche , 2006, Fig. 1 with
permission from IEEE].
Radarsat-1
ALOS-PALSAR
MYI
FYI
Figure 9.3 Sea ice scene from Baffin Bay, Canada, acquired on 13 January 2008 with the C‐band HH Radarsat‐1
and the L‐Band HH PALSAR showing good contrast between FY ice and MY ice in the C‐band and the excellent
delineation of pressure ridges and floe shape in the L‐band [ Arkett et al ., 2008].
the thick FY ice. However, the amount of ridging infor-
mation contained in the PALSAR data is far superior
compared to the C‐band data. The ability of the L‐band
to penetrate through a wet snow volume enhances the
detection of ridges and surface deformation during the
early melt season, a feature that is not available from the
C‐band data. Although Figure  9.3 confirms the utiliza-
tion of the L‐band for ridge detection, it also demon-
strates the difficulty of using these data in discriminating
between FY ice and MY ice. It is worth reaffirming that
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