SIR-C/X-SAR recording of a heavy rain event near Manaus, in the Brazilian state of Amazonas. The images in the lower row show, from left to right, X-, C-, and L-band. In the overlay, the individual images are shown in blue, green and red. This example shows the increasing signal attenuation caused by the rain at radar frequencies in C-band and X-band, while L-band is largely unaffected.