I Have this DEM and I am wondering which one is correct
by using Phase to elevation or phase to height
it is the same area with same data just one by elevation and the other is to height
if you look well there is a deference between ?
phase to height converts the unwrraped phase to the heights in the radar coded system so you need ground points with known altitude to converts your results into real ground values.
phase to elevation uses a digital elevation model in reference height calculation. This operator converts interferometric phase to digital elevation map.
Both operators are correct.
Seemingly the result referred to not well unwrapped phase, and this most probably comes back to the low coherent between the two acquisitions, jump phase is the case, but, would you please to check up the coherence map,
By the way, would you please to remove the same redundant topic you created.
This DEM is created by this procedure is DTM, Digital Terrain Model, for two reasons the first one The available DEM DTM is used to correct the one is being created, so the features above the surface are already removed, While DSM , Digital Surface Model , could be created, in case convert phase to height by providing the GCP’s of the features.
I have reestimateed the dtm using the 1 second SRTM. So now I will look for the ground control points for the dsm. It is the estimated DTM map. It is more noisy than the preveous one, but it is normal, I have used a single baseline… But we see less the effect of ondulation and it is mainly due to the unwrapping step… But what I don’t like and I like to share with SNAP experts is the range of estimated hegits, it is -400 and 1400…