Measuring topographic changes at active volcanoes by ...seom.esa.int/fringe2015/files/presentation52.pdf · Julia Kubanek – Measuring topographic changes at active volcanoes Geological
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
KIT – University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association
Geodetic Institute, Department of Civil Engineering, Geo and Environmental Sciences
www.kit.edu
J. Kubanek, M. Westerhaus, B. Heck Karlsruhe Institute of Technology, Germany
Measuring topographic changes at active volcanoes by double differential TanDEM-X InSAR
Julia Kubanek – Measuring topographic changes at active volcanoes
Geodetic Institute 11
Tolbachik – Kamchatka
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
Geological setting • Located at the southern end of the Kliuchevskaya volcano group • Tolbachik massif is composed of two overlapping, but morphologically dissimilar voclanoes
Geodetic Institute 12
Tolbachik
01.04.2015
Eruption in 2012/13 • ~ 9 month from Nov. 2012 till Aug. 2013 • Very fluid lava flows up to 20 km to the South • Development of new cinder cones
Tolbachinsky ´Dol
TanDEM-X DEM, 15.11.2012
Plosky Tolbachik
Ostry Tolbachik
Julia Kubanek – Measuring topographic changes at active volcanoes
http://www.airpano.com
Geodetic Institute 13
Tolbachik – Data
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
09.02.2014
Stripmap
Descending
121.2
-53.5
39.3
0.8
4x4
15.11.2012
Imaging mode Stripmap
Orbit Descending
Effective Baseline 31.6
Height of Ambiguity -210.6
Incidence Angle 39.4
Average Coherence 0.8
Multilooking 4x4
Geodetic Institute 14
Tolbachik – Results
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
15 Nov. 2012
N
N
09 Feb. 2014
N
N
Backscatter magnitude
Phase & Backscatter magnitude
Geodetic Institute 15
Tolbachik – Elevation difference
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
Geodetic Institute 16
Tolbachik – 3D Model
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
Total lava flow volume: 0.56 km³
Geodetic Institute 17
Conclusion
TanDEM-X enables to calculate topographic/volumetric changes due to volcanic activity Studies at different testsites proved that TanDEM-X enables to assess topographic changes on a 10 to 100 m level Good additional method to repeat-pass deformation analyses Great potential of TanDEM-X in volcano research
01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes
Geodetic Institute 18 01.04.2015 Julia Kubanek – Measuring topographic changes at active volcanoes