Click to edit Master title style 1 of 38 Remote Sensing Lectures, University of Oxford, Dept Earth Sciences, 2 nd Yr, Michaelmas 2014 InSAR & Measuring.

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Click to edit Master title style 1 of 38 Remote Sensing Lectures, University of Oxford, Dept Earth Sciences, 2 nd Yr, Michaelmas 2014 InSAR & Measuring Deformation

Click to edit Master title style 2 of 38 Remote Sensing Lectures, University of Oxford, Dept Earth Sciences, 2 nd Yr, Michaelmas 2014 Interferometric Phase due to Surface Displacement InSAR only measures the component of surface displacement in the direction of the line- of-sight to the satellite. ΔrΔr u n where n is a unit vector pointing from the ground to the satellite i.e. 1 fringe = 28 mm l.o.s. deformation for ERS ^

Click to edit Master title style 3 of 38 Remote Sensing Lectures, University of Oxford, Dept Earth Sciences, 2 nd Yr, Michaelmas 2014 Counting Wavelengths – Pond Analogy Count the number of ripple waves from the centre to the edge of the pond. If you know the distance between each ripple (the wavelength), then you can calculate the width of the pond. e.g. 30 cm ripple spacing, 6 ripples means 1.8 metres for half the width.

Click to edit Master title style 4 of 38 Remote Sensing Lectures, University of Oxford, Dept Earth Sciences, 2 nd Yr, Michaelmas 2014 InSAR Ground Displacements Port-au-Prince 12cm 0cm 24cm 60 cm motion towards the satellite 12 cm motion away