Fig. 2From: Midlatitude sporadic-E episodes viewed by L-band split-spectrum InSARUnwrapped differential interferogram with a new higher frequency and b new lower frequency. The bandwidth is reduced to 9.33 MHz from the original 28 MHz for ALOS/PALSAR fine beam single (FBS) polarization mode. Details of the InSAR data are shown in Table 1 Back to article page