ISPRS J Photogramm 65: 388–394įialko Y, Simons M, Agnew D (2001) The complete (3-D) surface displacement field in the epicentral area of the 1999 Mw 7.1 Hector Mine earthquake, California, from space geodetic observations. 70(10): 1151–1156Įrten E, Reigber A, Hellwich O (2010) Generation of three-dimensional deformation maps from InSAR data using spectral diversity techniques. Bull New Zealand Soc Earthquake Eng 43(4): 243–320ĭing XL, Liu GX, Li ZW, Li ZL, Chen YQ (2004) Ground subsidence monitoring in Hong Kong with satellite SAR interferometry. doi: 10.1029/2006GL026883Ĭubrinovski M, Green R, Allen J, Ashford S, Bowman E, Bradley B, Cox B, Hutchinson T, Kavazanjian E, Orense R, Pender M, Quigley M, Wilson T, Wotherspoon L (2010) Geotechnical reconnaissance of the 2010 Darfield (New Zealand) earthquake.
IEEE Geosci Remote Lett 2(2): 151–155īecher NBD, Zebker HA (2006) Measuring two-dimensional movements using a single InSAR pair. It is seen that the MAI measurements are very helpful in the derivation of 3D coseismic displacement fields as it provides more accurate displacement estimation in the north–south direction.īamler R, Eineder M (2005) Accuracy of differential shift estimation by correlation and split-bandwidth interferometry for wideband and Delta-k SAR systems. This makes us conclude that the Greendale fault is a normal and dextral strike-slip. Up to 2.5 m subsidence occurred in the hanging wall, while uplift is found in the footwall with an extreme case of 1.6 m in the far left of the fault. The horizontal ground motions, mostly eastwards in the hanging wall and westwards in the footwall, reached up to 2.5 m and are anti-symmetric with respect to the Greendale fault. The rupture revealed by the 3D surface displacement fits closely to the Greendale fault, which is believed to be responsible for the earthquake. We propose mitigating the ionospheric effects in the MAI processing with the directional filtering and interpolation procedure that has been applied in Offset-tracking. Due to the dispersive nature of the ionosphere and the slight Doppler shift between the forward- and backward-looking interferograms, the ionospheric effects can be more serious in MAI measurements than in D-InSAR. We do a three-dimensional (3D) decomposition of the coseismic displacement of the Darfield, New Zealand earthquake that occurred on 3 September 2010 by exploiting the Multi-Aperture InSAR (MAI) and D-InSAR measurements from both ascending and descending L-band PALSAR data. Differential interferometric synthetic aperture radar (D-InSAR) measures ground deformation only along the line-of-sight (LOS) of the radar, which limits the capability of D-InSAR in investigating the surface damages and the focus mechanisms of earthquakes.
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