SARPROZ ©

you need a good amount of patience and experience to become able to play correctly with the parameters and to be able to judge what is wrong in the results.
I do not know the details of your dataset and of the area you are processing, so, I cannot give precise suggestions.
Also, which images graph did you use?
Anyway,
a. why are you setting DL=30.…[Read more]

it looks like a memory problem, something that we never saw at this step. how much RAM does your system have?

Before attaching MAT and LOG files, please zip them first.
If the DEM is not well aligned, using the coregistration refinement will mess up your data.
Since you could not choose a GCP because you are using Matlab 2014b, highly probably your DEM is not well aligned.
Generally speaking, the coregistration refinement is needed only in particular…[Read more]

As you can see here http://www.sarproz.com/pcodes-instructions/
Matlab 2014b and later are not yet supported and the reason is exactly a big change that Mathworks implemented in the graphic management.

hi Matus,

the DEM you are showing is clearly smaller than the area you are analyzing.
this is not a good situation, since you are analyzing points where the DEM is not defined.
Which DEM value do you want to assign to the points where the DEM is not defined?
Think about it and solve it using an external tool to manipulate your DEM.
Or otherwise…[Read more]

if you have problem with the data cursor tool, it’s a matlab problem.
which version of matlab do you have? which operating system?

Sarproz ingests SLC (Single Look Complex) data.
You should check the TSX data sheet.
I am afraid you are ordering the wrong product (multi-looked)

Hi cnuhyl,

the infos you are providing are too few to understand your case.
First of all, in the PSC selection there is also a sparsing operation applied (points are made sparser according to the DS and DL values). You should check it.
Secondly, I am wondering whether your overwrote the coherence file.
To understand better, I suggest you load the…[Read more]

Hi Matus,

if you are running 2 instances of Matlab together, one instance may have opened a pool of workers exhausting your resources.
So, if the second instance opens a spmd process, it will return an error because no resources are available.
You can solve this issue by halving the number of workers for both instances.
Say that you have totally…[Read more]

If you are processing PS-like targets, use the star graph.
If you are dealing with distributed targets, it’s better to use a multi-master graph.
The MST is theoretically interesting, but practically it’s better to use more connections to stabilize the inversion.
If you use the (spatial) coherence as weight, it’s strongly suggested to use a…[Read more]

Hi Ivana
at this moment this calculation is not published.
The std dev in the paper mentioned by you is a statistical quantity.
The one listed in the sarproz output is a value calculated for that single time series.
The point is: the solution of the estimation is found as the peak of the periodogram.
How sharp is the peak? If the movement is…[Read more]

Hi Ivana,
some comments:
a. the standard deviation of the velocity is a measure of the peak width of the periodogram. It’s not a global parameter as the temporal coherence, it’s local (giving a view around the estimated parameter).
b. if it would simply be correlated to the coherence, it would not be useful. By already having the coherence, you…[Read more]

sorry, you are right.
The cumulative displacement is calculated using the model you chose for the time series analysis.
This reduces possible noise.

The time series in the site processing are referred to the first acquisition.
In the small area processing you can choose whether to refer them to the first acquisition or to the Master one.
However the Master acquisition may be noisy, so, the sw estimates an error and it removes it (so, the value at the master may be not zero).
The cumulative…[Read more]

yes, that is something to be tided up.
Initially, the Cum Disp tool was generated to calculate it based on the estimated coefficients of a polynomial.
Later on, I invented the smart tool, which is a non-parametric time series analysis.
So, the Cum Disp tool is consistent with the rest of the results (and it calculates the proper things) only if…[Read more]

The small area processing has been designed as a process independent from the full site analysis. Even if they can interact (see b).
So, my suggestion is:
(a) if you want to carry out different processing sessions with different parameters, you should save every time a different small area dataset. You do this using the “save” button in the small…[Read more]

Hi Santiago,
this is a small misunderstanding. To answer your question we firstly need to clarify some parameter names.
– Temporal Coherence: it’s the coherence calculated from the time series phase residues (the classic PSI parameter)
– Synthetic Coherence: it will be removed. It was a simulation
– Spatial Coherence: it’s the mean interferometric…[Read more]

Hi Santiago,
this is a small misunderstanding. To answer your question we firstly need to clarify some parameter names.
– Temporal Coherence: it’s the coherence calculated from the time series phase residues (the classic PSI parameter)
– Synthetic Coherence: it will be removed. It was a simulation
– Spatial Coherence: it’s the mean interferometric…[Read more]

Hi Santiago,
this is a small misunderstanding. To answer your question we firstly need to clarify some parameter names.
– Temporal Coherence: it’s the coherence calculated from the time series phase residues (the classic PSI parameter)
– Synthetic Coherence: it will be removed. It was a simulation
– Spatial Coherence: it’s the mean interferometric…[Read more]

-local maxima extraction with range lobes suppression
-local maxima extraction with range and azimuth lobes suppression

these two options are useful for suppressing ghost targets generated by side lobes of the impulse response of the system (cardinal sine). in fact, side lobes could already be suppressed by filters used in the focusing process.…[Read more]