Question regarding Phase to Displacement and Time series tool in SNAP

[ABraun]

these values of displacement are relative at first. You would then need to level it to zero elevation at some point.

Subsidence map in 3d view

in your original image, the band after the applied formula of above, they are the relative changes of each pixel in look direction of the sensor between both images. After applying the reference height (setting no-change areas to zero) they are supposed to be the absolute change. Here, negative values imply subsidence, positive stand for uplift.

Subsidence map in 3d view

Assuming that your unwrapped phase is “Unwrapped Phase_ifg_srd_VV_05Dec2008_24Apr2009” and your reference height is 15: Right-click on your unwrapped phase open Band maths and enter Unwrapped Phase_ifg_srd_VV_05Dec2008_24Apr2009 - 15 If the measured value is negative, add it instead.

However, the range of coarsely 10 m is quite huge…