Fig. 5

Interferograms showing ground uplift at Cordón Caulle in southern Chile from three different spacecraft, with the perpendicular baseline between acquisitions shown and all spanning the austral winter. a and b are from the C-band RSAT2 satellite with HH polarization and bandwidth over 100 MHz (Fig. 7); c is from the L-band ALOS-2 satellite; d and e are from the C-band Sentinel-1 satellite with VV polarization with bandwidth 20-60 MHz (Fig. 7). As expected, the L-band data quality is superior to the C-band radars. The HH polarizaton and higher bandwidth of RSAT2 provides better data quality over a larger area than the HH polarization and lower bandwidth of Sentinel-1 given the approximately same temporal span, perpendicular baseline and radar wavelength. The Wide Ultra Fine mode (a and b) has a higher bandwidth (Fig. 7) and spatial resolution (2 m/pixel) compared with the WideFine 2 mode (f). The brown polygon shows the 2011-2012 lava flow