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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Midlatitude sporadic-E episodes viewed by L-band split-spectrum InSAR

Fig. 1

a (Left) original range spectrum with its center frequency f 0 and bandwidth B w . (Right) corresponding base-banded SLC data from a point target at R. Here, T and τ indicate the pulse length and the delay time 2R/c from a target, respectively; c is the speed-of-light. The sinc function is defined as sinc(x) = sin(πx)/πx. b (Left) bandpass-filtered range spectrum with a new higher central frequency f H and bandwidth B w H . (Right) corresponding bandpass SLC data from a point target at R. T H indicates the reduced pulse length. c (Left) base-banded range spectrum with a new higher central frequency f H and bandwidth B w H . (Right) corresponding base-banded SLC data from a point target at R with new center frequency f H

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