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The _mask file tells you where the phase was unwrapped and where it was not
the image with no scale is a bug. we are going to upload soon a fix
best

hello i have few questions. i unwrap the interfrogram suing sparse LS LP, no mask. i found that there are 2 interferogram product, “date_UW” and “date_mask”. what does this mask refer to? when i export the “date_UW”, and convert to disp or height, i got single color image with no scale. if there is no conversion, the inferogram looks good. i had…[Read more]

hello, i have question regarding the flatten option. based the previous discussion, it is used to eliminate ramp? what does ramp refer to? i used the IR but get low coherency, most is 0.6 and below. IP gives me high coherency but it is a force option. what do means by force? should i use IP instead of IR? i am studying movement along a thrust…[Read more]

I do not know what you mean with “phase ambiguity parameter”.
The phase ambiguity is pi=3.1416… radians
If you convert the phase to height or displacement, you will get the corresponding values. Check any insar paper for the formulas.

Hello
I’d like to ask one question about phase ambiguity parameter, How the phase ambiguity parameter is calculated in the network?

https://www.sarproz.com/groups/sarproz-group/forum/topic/east-west-and-up-down-time-series/

I have one probably trivial question, when we export E-W cumulative displacement map in Multi-Sensor map, negative values stands for moving toward east or toward west? I suppose that positive values should be east and negative to the west, but just to clarify. Also, what are the conditions to use sparse export in same module? When I try to use it…[Read more]

Since a few months we developed a new module called “View/Export Extended Data/Results”.
Here the full description: https://sarproz.com/manual/plot_par_mod.html
Please update your software version if you have an old one.
We are still improving it, so, you could find minor bugs/changes.
The idea is that you can do what you want, using…[Read more]

hello, i’m a bit confuse in viewing the interferograms. In visualization tools, i plot the interferograms by selecting coherence as mask and set the threshold to 0.5 to 0.8. Is this necessary or i should just use the default (mask=none; threshold=0)? Next, i tried to export the interferograms on GE using the extended data export. I change the…[Read more]

Thank you prof. Perissin, for clarification, now everything is clear to me.
The reason why I have date_1 in table is because I have loaded csv into QGIS and plotted it. Since in GIS same column name cannot exist twice, suffix _1 was added to second (fitted) value automatically by QGIS. In original .csv file everything is fine and without _1 at…[Read more]

Not sure why you get date_1, can you paste an example here?
You should get the explanation in the first line of the csv file. Something like: “28 data entries plus 28 estimated movement entries ” and ” from 20081025 to 20091217 “.
This says that in the first series of dates you get the actual data, in the second series you get the model chosen to…[Read more]

Hello prof. Perissin,

When I export processed data to CSV from time series module, (e.g. cumulative displacement), I can see that there are actually two dates and two values for the same point (latter is with _1 suffix). I suppose that those are components of cum. displacement, but can you please answer me which value stands for what (date &…[Read more]

Thank you for the quick reply.
So from what I understand flagging the Phase operation when exporting the Def. Trend is not correct? Because it is in the real domain?

Thank you in advance,

Asterios

The “Filter/Matrix visualization” function in “Scatter Plots” displays scattered data in matrix a form. In Matlab this is much faster rather than displaying scattered points directly. It basically consists in re-sampling your scattered data on a regular grid. This operation corresponds to a spatial filter. And you can actually apply a filter…[Read more]

Thank you Mr Perissin for the quick response.

Hi Asterios,
the general answer is: you would need to take a Sarproz course, where we teach exactly this, that is, how to judge and improve your results without any prior knowledge.
More in detail, always start with the easiest and default approach: linear trend, automatic and default choices. The software extracts and suggest you numbers,…[Read more]

CSV file fields:

ID – point reference id (sequential)
LAT, LON – latitude and longitude
SVET, LVET – sample and line, pixel SAR coordinates
HEIGHT – relative to sea level (m)
HEIGHT WRT DEM – relative to the external DEM (m)
SIGMA HEIGHT – height estimation standard deviation
VEL – deformation velocity in mm/year
SIGMA VEL – velocity standard de…[Read more]