paulinanino

  • Hi,professor

    How to import radarsat-2 data?

    My soure image is TIFF format,it’s in a folder called”RS2_OK60115_PK140099_DK124064_W1_20101122_222717_VV_SLC”,its original name is image_VV.tif,in these folders ,there are other XML format file.
    I try to put one TIFF format in SLC folder,the work directory is like this “/home/user/rsat-2/”.It didn’t…[Read more]

  • periz replied to the topic QPS with DEM in the forum Sarproz Forum 9 years, 8 months ago

    Hi Ivana,

    first of all, QPS is a title which we used in a paper. However, as you have seen, Sarproz does not allow straight “PS” or “QPS” approaches. In fact, one can choose among many different options:
    a. Images graph. The Star graph is adopted for PS-like approaches. For other approaches, you can choose the images graph better suiting your…[Read more]

  • ivca-cz started the topic QPS with DEM in the forum Sarproz Forum 9 years, 8 months ago

    Hello,

    when asking how to make QPS, I got the reply that it is “APS with weights”. I understand it, but when I try to click on weights, I get a message that I cannot use the DEM and weights at the same time. Is it a way to overcome this, to make QPS in mountaineous areas?

    Thank you, Ivana

  • Good we have analyzed and solved all matters.

    1. if in a dataset of 15 images there are 2 or 3 bad images with high shifts, it is useless to process all of them with non-standard parameters: firstly, one has to coregister the dataset with standard parameters, after that one can deal with the faulty images one by one searching for the proper way…[Read more]

  • 1. “Size inputs must be integers” never happened to me before. please let’s have a remote session, if the image is corrupted we need a better check with consequent message.
    2. “corregistrated slaves were shifted directly in the image where Slaves Extraction is stopping now” don’t know what you mean
    3. Higher Delta and Coarse Xcorr usually sol…[Read more]

  • Hi,

    I have problem with Slaves Extraction of ALOS images: “Size inputs must be integers”. Does it mean that image is corrupted? I’ve tried to corregistrate the set of 15 images before (in old version), get succesfully through Slaves Extraction but the corregistration went wrong – corregistrated slaves were shifted directly in the image where…[Read more]

  • periz replied to the topic DEM coregistration in the forum Sarproz Forum 9 years, 8 months ago

    At this moment the preliminary geocoding options are:
    – keeping the orbits as they are
    – using an automatic way through an external DEM (which is done just comparing the reflectivity map with the synthetic amplitude)
    – using a manual ground control point

    Since the software was initially designed for high-quality high-resolution urban-structural…[Read more]

  • Hello,

    is it somehow possible to check the parameters (output) of the DEM coregistration step? Roughly compared with an eye, it is ok (plotting refl. map and synth. amplitude) , however I would like to see the numbers, shifts (for each window) and cross-correlation.

    Or, better, is it possible to improve the DEM using an interferogram or more of…[Read more]

  • periz replied to the topic APS estimation in the forum Sarproz Forum 9 years, 8 months ago

    The stratification option is used to estimate a correlation between APS and elevation (DEM).
    If you work in a mountainous area and if you have coherent point at different altitudes, you can use it and it should help compensating the vertical stratification of the APS.

    DSF is the downsampling factor of the final APS. R is the length of the…[Read more]

  • ivca-cz replied to the topic APS estimation in the forum Sarproz Forum 9 years, 8 months ago

    Hello,

    I would like to ask what are the other parameters in this line:

    – stratif – should it be used for ionospheric compensation (in case of L-band data)?

    – R and DSF – I understand that it is something like the “smoothness” of the estimated atmosphere; however, why are two parameters and in what units are they?

    Thank you,
    Ivana

  • You are correct.
    Sarproz is also doing some further checks. E.g. in the recent releases it tells you explicitly if there was any kind of precipitation in the date chosen as Master. It’s important to avoid any possible source of errors in your Master image.
    Also, it would be a good practice to chose the Master image in winter, when the atmospheric…[Read more]

  • Hi Ivana
    This is the logic behind Sarproz: it firstly estimates the center of the scene, and it gives you an area around the center with a given radius. If you want to move the area, you have to shift the coordinates of the center. Then the extension is chosen either by changing the radius, or by inputting manually the desired final size of your…[Read more]

  • Dear All,

    I have a few questions regarding baseline (temporal and spatial) and master scene selection . What is the best way to select a master in order to get best results? Is there any specific guidelines to get the best interferograms out of the SAR images? From what I’ve read and studied so far, the idea is to minimize the distance between…[Read more]

  • Dear All,

    I have a few questions regarding baseline (temporal and spatial). What is the best way to select a master in order to get best results? Is there any specific guidelines to get the best interferograms out of the SAR images? From what I’ve read and studied so far, the idea is to minimize the distance between master image and other slave…[Read more]

  • Hello,

    I have problems importing the data at the edge of the scene. From the footprints, it seems that my AOI (approx. 200×200 m) is 6.5 km from the northern border of the scene (I know it is not really precise). Once I managed to deal with the northern border, but the crop was shifted too much to the east (probably due to DEM), so I know that…[Read more]

  • Dear Dr/Mr Periz,

    I have followed the same steps as mentioned in http://www.sarproz.com/publish/notes1.pdf. As i am not able to connect to internet (since my system is connected via iisc proxy), i unchecked the function “ext orbits”. thereafter i used set orbits function and read the master and slave images with pre-defined settings. Now i am at…[Read more]

  • Dear Dr/Mr Periz,

    I have followed the same steps as mentioned in http://www.sarproz.com/publish/notes1.pdf. As i am not able to connect to internet (since my system is connected via iisc proxy), i unchecked the function “ext orbits”. thereafter i used set orbits function and read the master and slave images with pre-defined settings. Now i am at…[Read more]

  • it looks correct, but you have to unpack the files
    if anything is not in the right place, the sw will tell you what he searches for

  • If you believe you have the correct orbit file, in the same level of your data folder, create a folder by the name of “ORBITS”, and put your orbit file in structures like this:

    ORBITS/ENVISAT/yyyymm or
    ORBITS/ERS1/yyyy or
    ORBITS/ERS2/yyyy

    where yyyy is the year and mm is the month of your orbit file

    But you must make sure you have the correct one

  • Dear Sir,

    What you said is correct. Yy system is using a (iisc) proxy to connect to internet.
    I cannot connect to internet by VPN right now. i will try it later.

    I am trying to connect to esaftp.dfd.dlr.de, but it is asking the user name and password to retrieve the files. from ESA, i have downloaded the orbit files earlier. can i use the same…[Read more]

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