TY - JOUR
T1 - Mapping three-dimensional surface deformation by combining multiple-aperture interferometry and conventional interferometry
T2 - Application to the June 2007 eruption of kilauea volcano, Hawaii
AU - Jung, H. S.
AU - Lu, Z.
AU - Won, J. S.
AU - Poland, M. P.
AU - Miklius, A.
PY - 2011/1
Y1 - 2011/1
N2 - Surface deformation caused by an intrusion and small eruption during June 1719, 2007, along the East Rift Zone of Kilauea Volcano, Hawaii, was three-dimensionally reconstructed from radar interferograms acquired by the Advanced Land Observing Satellite (ALOS) phased-array type L-band synthetic aperture radar (SAR) (PALSAR) instrument. To retrieve the 3-D surface deformation, a method that combines multiple-aperture interferometry (MAI) and conventional interferometric SAR (InSAR) techniques was applied to one ascending and one descending ALOS PALSAR interferometric pair. The maximum displacements as a result of the intrusion and eruption are about 0.8, 2, and 0.7 m in the east, north, and up components, respectively. The radar-measured 3-D surface deformation agrees with GPS data from 24 sites on the volcano, and the root-mean-square errors in the east, north, and up components of the displacement are 1.6, 3.6, and 2.1 cm, respectively. Since a horizontal deformation of more than 1 m was dominantly in the north-northwestsouth- southeast direction, a significant improvement of the northsouth component measurement was achieved by the inclusion of MAI measurements that can reach a standard deviation of 3.6 cm. A 3-D deformation reconstruction through the combination of conventional InSAR and MAI will allow for better modeling, and hence, a more comprehensive understanding, of the source geometry associated with volcanic, seismic, and other processes that are manifested by surface deformation.
AB - Surface deformation caused by an intrusion and small eruption during June 1719, 2007, along the East Rift Zone of Kilauea Volcano, Hawaii, was three-dimensionally reconstructed from radar interferograms acquired by the Advanced Land Observing Satellite (ALOS) phased-array type L-band synthetic aperture radar (SAR) (PALSAR) instrument. To retrieve the 3-D surface deformation, a method that combines multiple-aperture interferometry (MAI) and conventional interferometric SAR (InSAR) techniques was applied to one ascending and one descending ALOS PALSAR interferometric pair. The maximum displacements as a result of the intrusion and eruption are about 0.8, 2, and 0.7 m in the east, north, and up components, respectively. The radar-measured 3-D surface deformation agrees with GPS data from 24 sites on the volcano, and the root-mean-square errors in the east, north, and up components of the displacement are 1.6, 3.6, and 2.1 cm, respectively. Since a horizontal deformation of more than 1 m was dominantly in the north-northwestsouth- southeast direction, a significant improvement of the northsouth component measurement was achieved by the inclusion of MAI measurements that can reach a standard deviation of 3.6 cm. A 3-D deformation reconstruction through the combination of conventional InSAR and MAI will allow for better modeling, and hence, a more comprehensive understanding, of the source geometry associated with volcanic, seismic, and other processes that are manifested by surface deformation.
KW - Interferometric synthetic aperture radar (SAR) (InSAR)
KW - SAR, 3-D surface deformation measurement
KW - multiple-aperture interferometry (MAI)
UR - http://www.scopus.com/inward/record.url?scp=78650950155&partnerID=8YFLogxK
U2 - 10.1109/LGRS.2010.2051793
DO - 10.1109/LGRS.2010.2051793
M3 - Article
AN - SCOPUS:78650950155
SN - 1545-598X
VL - 8
SP - 34
EP - 38
JO - IEEE Geoscience and Remote Sensing Letters
JF - IEEE Geoscience and Remote Sensing Letters
IS - 1
M1 - 5503996
ER -