COSMO-SkyMed AO projects - Tidal deflection characteristics of Campbell Glacier, East Antarctica, observed by double differential SAR interferometry

In this paper, we suggest a method of estimating flexural parameters of glacier responding to tide height. During 2010 to 2011, we obtained 16 COSMO-SkyMed one-day interferometric tandem pairs over Campbell Glacier, East Antarctica, in every 16 days and extracted signal from vertical tidal motion by applying Double-Differential Interferometric SAR (DDInSAR) technique. To find the tidal flexural parameters for Campbell Glacier, we used several tide models (TPXO7.1, FES2004, CATS2008a and Ross_Inv) and an elastic beam model. The result showed that the inverse barometric effect-corrected Ross_Inv showed best correlation with the tidal motion from DDInSAR. The deflection constant of Campbell Glacier was determined to be 0.926 with R² of 0.964. The elastic damping factor of a stream line, as an example, was derived as 0.827±0.099 km^-1, from which the glacier thickness was estimated to be 406±52 m.