Ice Sheet Motion. Speckle tracking. InSAR. Feature Retracking. Day 1. 100 m. Day 24. Day 1 Day 24. Day 1 Day 24. 10 m. 10 m. Velocity measurement techniques. Speckle Retracking. Speckle Geometry. Range direction only. Preprocessing. Doppler Overlap.
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(See if you can use the image data to compute doppler spectra)
For a purely vertical separation, corresponding to about 14 m in height, the azimuth
Displacement will change about 3 parts in 10^6. There will be an accumulating
Error such that after about 500 km, the azimuth will be incorrect by a measurable
An early incorrect idea
Option 1 – azimuth offset, range phase; azimuth offset, range offsets; ascending descending range;
We assume that several terms are small: change in look direction is small; changes in flow directions are small for large glaciers over 0-30 km, Large scale strain rates not effected by surface slope.