matusbakon

  • periz replied to the topic Invalid SRTM file in the forum Sarproz Forum 7 years, 4 months ago

    If you check your failing SRTM file,
    it should be very small, you can open it with a text editor, you will see it is actually an html file, not a zip one
    delete it and all similar files, that will solve the problem (the software will download them automatically when needed)
    if you are not sure about which file is good, which one is not, delete all…[Read more]

  • Hello, I have the same problem, I update the software several times by “manage version” (or try because I still have compile version from 29.oct.2016) and the problem with the Invalid zip file “E:IMAGERYSRTMN18W070.hgt.zip”.

  • Hi Jaroslav,
    first of all, take this as a temporary message. We are working at general solutions for avoiding these problems.
    Secondly, when you get such messages, the first thing you should do is checking if this has an impact on the phase.
    The quickest solution is temporarily discarding images that generate this problem.
    Otherwise, the problem…[Read more]

  • Hello everyone!
    During co-registration of my dataset I often get a warning, my area of interest doesn’t have enough coherence.
    WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!!
    Your AOI does not have enough coherence for accurate subpixel coregistration!!!
    A linear azimuth ramp may appear on your interferograms as the result!!!…
    [Read more]

  • Hello everyone!
    During co-registration of my dataset I often get a warning, my area of interest doesn’t have enough coherence.
    WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!!
    Your AOI does not have enough coherence for accurate subpixel coregistration!!!
    A linear azimuth ramp may appear on your interferograms as the result!!!…
    [Read more]

  • Hello everyone!
    During co-registration of my dataset I often get a warning, my area of interest doesn’t have enough coherence.
    WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!! WARNING!!!
    Your AOI does not have enough coherence for accurate subpixel coregistration!!!
    A linear azimuth ramp may appear on your interferograms as the result!!!…
    [Read more]

  • Thank you for the reply,

    I think the office’ proxy block the connection :

    Unsuccessful open : Connection timed out: connect
    … A connection Could not be opened, moving forward …
    It looks like non of the servers is accessible. Try again later.

    Does admin can (re)-send a windows version to me ? (by the way, I just received the linux one,…[Read more]

  • Please update your code with the lastest version via the “manage version” module, that you find in the “dataset selection” window. this is a bug that we already fixed.

  • Now the problem comes when I click on “Set Orbit” :

    Here a glimpse:

    Undefined function ‘s1a_get_n_read_orbit’ for input arguments of type ‘struct’.

  • Oups,

    Sorry, nevermind.
    The problem was linked to file corruption by Windows during unzip.

    I should have check it earlier.

  • Hi everybody,

    I’m having trouble loading data from Sentinel 1 (i use SARPROZ without Matlab on Windows 7)

    I download a set of data that I unzipped in the following folder :

    ./TEST/SLC/S1A_IW_SLC__1SDV_20160327T173055_20160327T173122_010558_00FB1C_B375.SAFE (the metadata.xml is next to it)

    This folder contains :
    * subfolders with files at 0 Ko…[Read more]

  • Dear all,

    in the past months we have been busy on many developments. Here a brief review of them.

    1. The coregistration process has undergone many modifications. Some operations have been speeded up, some new options are available in the coregistration parameters. Data have been re-organized in subfolders in the EXT directory.
    But most…[Read more]

  • Hi Prashant,
    Yuxiao has been working at the weather data module for the past 2 weeks, rewriting the code and making it stable against changes on the online weather database (the error is caused by some data returned in an unusual format). We will release a new version very soon. Please be patient a bit more.
    bests

  • Hi Prashant,
    such an error -as you point out- is affecting a Java command. After a quick search online I found the following:

    “Probably for some reason the connection dropped. There are a number of different reasons that can happen, including

    system overheating
    driver problems with your ethernet card
    hardware problems with your…[Read more]

  • Hi,
    I am getting some problem in co-registration of sentinel-1 images. I am attaching log file and lasterror file. I am trying this from more than 15 days. Every-time error comes after downloading weather data. I also checked checked ftp server and everything is fine.

    Downloading weather station from http://ftp... Done.
    An error occurred and was…[Read more]

  • Dear

    I am getting some error. Can you please check? I am attaching screenshot and log as well as lasterror file.

    Thank You

  • Hi Jaroslav,
    I assume you are talking about azimuth shifts. That is common for Sentinel and it’s not a problem.
    You should not have any coregistration issues.
    Moreover, you can put consecutive images in the SLC folder: Yuxiao developed a simple algorithm to merge them, and you can treat them as a whole image.

  • Hello!
    It often happens, that Sentinel doesn’t take pictures of an exactly same place. One-two burst difference may take place.
    I am wondering, if two pictures overlap covers area, that I’m interested in, what is the maximum allowed image shift, so that co-registration can be trusted?

  • There are many things you don’t say,
    as how you calculated those parameters, what does your dataset look like (in terms of number of images, distribution of acquisition dates/baselines/doppler). then we should check the original parameters as reflectivity, ampl stab ind, spat coher and so on.
    anyway, as a general answer, if the spatial coherence…[Read more]

  • Hello again

    Thank You Doctor. I got it. But the Number of selected Points with spatial coherency index is less than ones with Amplitude stab. index.
    In my case, most of the points have low spatial coherency.

    Result of selected Points using spatial coherency and amplitude stab. indices with the same threshold are attached here.

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