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Hi Ivana,
we are adding an option for visualizing which image has the problem.
I’ll send you the pcodes by email, there are also some other changes going on, keep it as a temporary version.
You’ll have to use the “debug” option in advanced parameters.
In that way, you can post here which is the image with problems, Yuxiao needs to look into it.
bye
d

Ciao Dan,

Here the names of two of the images:

S1A_IW_SLC__1SDV_20160104T052642_20160104T052709_009340_00D80F_1E18
S1A_IW_SLC__1SDV_20151223T052642_20151223T052709_009165_00D311_E59E

I know this is not the propper place to ask this, but have you experienced recently problems to download Sentinel-1 data?

Thanks,
Santiago

Hi Santiago,
send us the file name of a VV/VH image so that we can download and check it
dan

Hi Matus,

Sorry for the late reply..

Since the coregistration will rely on the area and quality of overlapping parts between bursts, it is always generally a good idea to extract a bigger area (especially on range direction) so to ensure there are enough overlapping parts for fine-coregistration.

Then, since the fine-coregistration will rely…[Read more]

Hi Dora,

The link is fine. I am going to run you data in a while and then let you know!

Yuxiao

Hi Yuxiao,

I’m sorry for the delay, I’m having trouble with the ftp. Please let me know if you can access the image through this link instead: https://www.dropbox.com/sh/u8gekioz09t9ynf/AABb2ecF1XYTu7sutZqEQflya?dl=0

Thanks,
Dora

Hi Sg,
– here http://sarproz.com/manual/slc_data_module.html you can read that you can update your dataset, trying to coregister again the failed images (be careful, when you press buttons always read carefully the messages given by the sw. in particular, if you do not check the “update” option you may overwrite your work if you press randomly…[Read more]

Hi Dear Nader,

Yes first we should at least see the fringes.

In the second place, as said in the previous topic, It would be great for you to send me you master image’s file name (or date, but file name preferred), the image pairs (same as master image) that has ramps, and the range (coordinates, samples and lines) you set for your area so t…[Read more]

Hi Ivana,

Thanks for the info! I will take a look into the data and let you know!

Yours,
Yuxiao

hi Nader,

as mentioned by Yuxiao in a previous topic, there could be several reasons for having a ramp on an interferogram.
E.g. orbital inaccuracies, coregistration problems, atmospheric artifacts and so on.
Yuxiao is checking it because the Sentinel processing still deserves some extra care.
Generally speaking, forgetting for a moment that you…[Read more]

Dear dan,
Thank you for your help, I downloaded manually the SRTM hgt files (for some of them with 0 values) and put them in SRTM directory.
Now it seems the DEM visualization is ok.

regards
Nader

Hi Nader,
in your picture you can see 2 different types of NaNs (not-a-number):
a. some spots here and there (usually in areas of steep slopes): they correspond to SRTM missing data. Sarproz interpolates those values when the DEM in SAR coordinates is generated. You can check the result after your process it, by plotting it with the “view…[Read more]

Are there any general advices while processing Sentinel-1 IW SLC? Like extracting a bigger area first? I’ve seen hints for increasing the area size by 1500 pixels, etc.

Many thanks to you Yuxiao,

Cheers

Hi Yuxiao,

I am sending all the filenames (zipped) I use. As master, I am using 20150703, IW2, center 50.54, 13.5, radius 20 km.

Using MST as with long temp baselines, it gets heavily decorrelated.

So, these are the pairs with phase ramps (is it possible, that the phase ramps are only in the “upper” part of the interferograms?)

20151124 -…[Read more]

Hi Ivana and Matus,

The phase ramps within the interferograms is usually a case-by-case issue and we do need to take a look case-by-case, since there are a number of issues that might cause the ramp.

It would be the best for you to send me you master image’s file name (or date, but file name preferred), the image pairs (same as master image)…[Read more]