SARPROZ ©

1. that is no “software error”. it’s a message about terms called “master error” and “reference error”. if the software returns an error you get the usual messages “an error occurred … lasterror.mat was saved …”
2. probably you clicked on a pixel which is not a PS. but as I can see from that attachment, a PS IS selected and its parameters ARE…[Read more]

Dear Prof.Daniele

From the problem above, It is SOLVE and OK.

But, After I re-processing my data, Any problem occur.
I used 20 ENVISAT ASAR image and using STAR-graph (before I used MST-graph).
In Site Processing toolbox, I have done and have very good result based on coherence graph (See image).
I want to generate Geocoding, it’s mean I must…[Read more]

I think I made a mistake, it was the logical cores…

I am afraid this is an overfitting case.
I suppose you do not have many images, so, in such case I do not suggest you to estimate the thermal expansion.
Also, keep height and velocity ranges small in the APS estimation.
Better you remove high points when estimating the APS.
The APS estimation process should be kept as simple as possible. Later in…[Read more]

I am tempted to answer in the following way:
whatever the initial PSC you select, there is no better way to identify the good targets as with the temporal coherence. That is, the best way to state if a point is reliable or not is to look at the phase dispersion after analyzing the connections. With “analyzing the connections” I mean processing the…[Read more]

Hi Anarizka,

1) Here my personal suggestion about your first question. The best way to understand the goodness of your results (both preliminary and final) is based on the knowledge about the process you are investigating. You should address your specific case study (landslide? subsidence? localised structural issues?) being driven by a general…[Read more]

I am running with your suggestion, it will take quite a while, hope it works.

DataSet Selection –> Advanced Parameters –> disable “Play Sounds”
let me know if this solves your issue

Dear Prof.Daniele

I would like to ask,
1. based on what we can conclude that SAR has good results and can use the APS options ( IP , IR , Tri.IR ) in the area of ​​the case study ? Can you attach some paper / reference, in order to we can understand more each parameter. It is not enough to judge like your say that “the APS looks ok and the tes…[Read more]

What do you mean that this is wrong? How can you say it’s wrong?
Don’t be afraid that a temporal noise in this case is not corresponding to a spatial noise.
In space you are applying several smoothing operations (interferogram filtering, unwrapping, APS estimation)
so, it is reasonable to expect a spatial correlation in the results
the problem is…[Read more]

Hi Yuxiao,

black borders has gone, thank you, however, footprints are now slightly different and they are not covering whole AOI. I’ll try to search for adjacent track based on Daniele’s suggestion from other forum thread and I’ll continue on testing.

Cheers

Matus

There are no better or worse things. They are simply different and they apply to different analysis/objectives.
Using the Amplitude (Models!) is useful e.g. in the case of temporary targets. You don’t use it in multi-master approaches.

The MST is by definition connected. However, even if theoretically interesting, the MST is practically not very…[Read more]

Thank you very much.
when I processing a multi-master images graph ，what is the different about using coher or Amps as a weight? which is better?
Should the MST graph all connected? And how many connections better?

I looks like the following:
– you are processing a multi-master images graph (it would be nice to see it)
– you are using the coherence as a weight in the inversion (is this the right choice? you need to look carefully at all your interferograms)
That message says that there are points for which some low spatial coherence values break the images…[Read more]