I have managed to unwrapped the phase and I used the phase to displacement tool to generate the displacements. Are these displacements LOS or vertical?
Also, how can I use the time series tool in SNAP (under RADAR)? I would like to see the displacement time series of a pixel between different pairs of INSAR images. The HELP tool does not seem to work.
@falahfakhri, when I convert the unwrapped phased to vertical displacement using the methodology of Subsidence map in 3d view then it is still in the range of 4+ meters which looks a bit unrealistic.
I am analyzing the Nov 14, 2016 New Zealand earth quack site.
To correct my question!
When I convert the unwrapped phase to metric unit (meters), but even if it is in LOS phase or in meters… their range is (-973.1 to 133.2 phase) and (-0.97 to 9.35 m) respectively.
What could I have done wrong?
Thanks ABraun, This was based on the default coherence band of the interferogram and I guess that could be a reason that is why I am also now re-analysing the same with the masked coherence > 0.5, will share the next result as well.
I know that you have mentioned it in other posts as well to subtract the reference hight from the Unwrapped phase but was a bit unclear, can i figure out the reference height by masking the Unwrapped phase with the highest coherence??
the reference height would be at a point where you have high coherence and expect no change in the image. The displacement value at this point is the one to to level to zero (by adding or subtracting the respective value). If you then mask out all areas with low coherence the total displacements along the LOS should remain .