SARPROZ ©

Dear Prof.Daniele

Another question.
I try to compare with GPS statiun (LIKNstatiun that I plotted in GE). This statiun have distance around 8km from my area. I think its shape almost same. So, Have I considered it or no?

Best Regards,

Ana

Hi, Pro. Daniele,

(1) I’d like to know something about APS estimation.I used 32 scenes TerraSAR-X and Tandem-X images in all.The zip file contains the parameters of APS estimation and the results.I found the connection coherence is good,but the result of APS including “PS coherence after graph inversion and APS removal” are bad and the image…[Read more]

1 and 3. When you work with Persistent Scatterers (without using weights, that is, without filtering) Sarproz does not need to generate and write interferograms. Interferograms may be processed if you want to see them or if you want to use filtered phase. If you choose to process your data with a QPS-like approach (that is, using the coherence as…[Read more]

Dear Prof.Daniele

I have processed almost 3 square-kilometer area.
Hope you give me suggestion to increase good results.
How about my second question (GPS data). Could you explain it?

Please, Find attach file below.

Best Regards,

Ana

Hi Ana,

your result is not looking very good. How big is the area you are analyzing? can you plot the PSC graph with coherence-colored connections? Can you show us the reflectivity map and the coherence map?
dp

Hi Ana,

your result is not looking very good. How big is the area you are analyzing? can you plot the PSC graph with coherence-colored connections? Can you show us the reflectivity map and the coherence map?
dp

Dear Prof.Daniele

1. For make sure that PSInSAR correct processing, how many factor must be considered besides from the attach image?
And how about your opinion based on my results
2. From PSInSAR, Must I have GPS data for verification? Any likelihood below:
(a). I have GPS data but the statiun far away from my area (equal to 8km)
(b). I did…[Read more]

Hi Santiago,
1. you choose a parameter on which you want to place a threshold (more advanced option: building your own set of points through “save selection” in “scatter plots”, and select it as a real file here)
2. you choose the threshold
3. you choose if you want to make the selection of points sparser or not. If not, place DS=0, DL=0. If you…[Read more]

Hello,

Could you offer me some guidance as for the Sparse Points Selection criteria in the APS tool?

I’m not very sure what each option means,
Thank you,

Santiago

Dear Prof.Daniele

I have done to choose Href, prof.
From the first step about geocoded refl map, I must re-process it again or no. Because from GCP selection, the SAR coordinat and Geo coordinat in GE it looks like match well.

Please, find attach file below

Best Regards,

Ana

Hi Ana,

from your geocoded refl map 11.jpg, I can tell you that it is not well geocoded. It looks shifted.
The Href is at the top of your 21.jpg. Currently, you see NaN inside the text box.
To know the value of the height, you need to sketch the SAR acquisition geometry, considering the incidence angle.
Do it, it’s a good exercise for…[Read more]

Dear Prof.Daniele

To have point match in GE, I have done first step to choose GCP that align in SAR image. you can see in 1.jpg (attach file). I think its SAR image and GE match well. After I choose small area processing, the shifting problem still unsolved (2.jpg file). As far as processing, I still can not find where is the Href box located.…[Read more]

yes it can
but since not many users tried it, it would be good if you would send us a feedback after trying
thx
dp

OK, thank you. I ve just discovered that the residue values in the CSV are also in mm, therefore they go up to plus minus lambda/4.

Ktemp (in the CSV) is in rad/deg or mm/deg? That could be the reason of problems.

1. to have the points match in GE, you need 2 things
– first of all, you must have (previously) chosen a GCP that aligns your SAR data to external geographic features (as a DEM or as points selected in GE)
– secondly, if you are processing a small area, the reference point should have been previously processed in the “site processing”, and its…[Read more]

hi ivana I cannot see it from what you have attached
you should send pictures with (taken from the small area module):
– multi image insar analysis window so that we see the options
– geocoding windows
– example of time series with problems
isn’t it that it’s in mm?

I am using star graph. What else can be wrong?

The time series as you can see was generated right now, from saved data, with nothing ticked.