Toward Operational Compensation of Ionospheric Effects in SAR Interferograms: The Split-Spectrum Method

—The differential ionospheric path delay is a major error source in L-band interferograms. It is superimposed to topography and ground deformation signals, hindering the measurement of geophysical processes. In this paper, we proceed toward the realization of an operational processor to compensate the ionospheric effects in interferograms. The processor should be robust and accurate to meet the scientific requirements for the measurement of geophysical processes, and it should be applicable on a global scale. An implementation of the split-spectrum method, which will be one element of the processor, is presented in detail, and its performance is analyzed. The method is based on the dispersive nature of the ionosphere and separates the ionospheric component of the interferometric phase from the nondispersive component related to topography, ground motion, and tropospheric path delay. We tested the method using various Advanced Land Observing Satellite Phased-Array type L-band synthet...

• Type: Journal
• Year: 2016
• Where: TGRS
• Authors: Giorgio Gomba, Alessandro Parizzi, Francesco De Zan, Michael Eineder, Richard Bamler
• Keywords: TGRS 2016