3 Years Gap Temporal Interferometric Coherence at P Band

Abstract:
During BIOSAR-3 campaign, funded by ESA in support of BIOMASS, in September 2010, the ONERA Airborne SAR SETHI acquired data over the Remningstorp area flown by E-SAR from DLR in March- April 2007 with the exact same tracks in order to evaluate the behavior of the temporal interferometric coherence over forest with a 3-years gap. SETHI and E-SAR systems do not have the same center frequencies (355 MHz for SETHI, 340 MHz for E-SAR) and bandwidth (150 MHz for SETHI, 70 MHz for E-SAR). Special post-processing was conducted on the SETHI data and German data in order to obtain a dataset with equivalent frequency bands and geometry. The results show a surprisingly good coherence level, potentially opening the way for applications such as tomography, multi- baseline PolInSAR, coherent change detection …