I would like to ask in what units are the amplitude values. As these values (up to 4 for most of the area, high-amplitude points up to 30-40) do not seem to be the absolute values (expecting to 10^3, high-intensity points up to 10^8), neither the decibels (or decibels w.r.t. what?).
Images are equalized via a simple normalization process.
You need it to perform statistics on amplitude time series.
The unit of amplitude is volt. But its value is useful only if compared to other values, not in an absolute way.
If you could calibrate it by knowing the amplitude of a reference corner reflector,
you could derive the RCS of targets (in sqm). I think you find it in my phd thesis.
you raised a good point. We used to store the normalization constants many years ago, but we did not implement it when we included the SLC module. The image amplitude is normalized to have an average value equal to 1. You could further equalize the images using only stable targets. But the matter of fact is that at this moment the constant is not saved.
We are including it in the todo list…
first of all, the Synthetic Amplitude (which you can plot using the view params module) is the amplitude generated from the DEM (showing the geometric distortions derived from the topography).
Secondly, the parameter choice in the TS module is for displaying points with a color. So, used only in case you export a kml.
Thirdly, the time series module exports deformation time series.
If you want to export amplitude time series, I suggest you to use the small area module.
At this moment we do not have a module for exporting amplitude time series for the full site.
If this is what you need, we should discuss about it.