Workflow between SNAP and StaMPS

ABraun · June 29, 2021, 8:52am

yes, please have a look at this post: StaMPS - Detailed instructions

ssharifi · August 5, 2021, 6:17am

Hi Gijs,

Could you resolve this issue? I’m having the same problem…

Sohrab

suribabu · August 5, 2021, 6:40am

Check this below one, For me it’s working.

ssharifi · August 9, 2021, 1:52pm

Thanks a lot suribabu! but unfortunately that didn’t work for me…
Apparently, not so many people had the same issue so probably that’s something related to the dataset.

Snow · November 17, 2021, 3:32am

hey, i ran into the same problem. have you found the solution?

deepesh · January 3, 2022, 11:39am

hi
i’m getting this error in mt_prep_snap, pls help

suribabu · January 3, 2022, 1:30pm

Remove inverted commas and run

deepesh · January 3, 2022, 1:58pm

gnwiii · January 3, 2022, 2:31pm

The space in a directory name likely causes your problem.

suribabu · January 3, 2022, 2:35pm

instead of INSAR_20160219 just give INSAR_20160219/

deepesh · January 3, 2022, 3:01pm

i tried with both suggestions, it worked but another error came
is it my system? i downloaded ubuntu in virtualbox and set up everything for stamps

ABraun · January 3, 2022, 6:55pm

The “segmentation fault (core dumped)” error occurs because StaMPS was compiled with the wrong compiler. You find a solution here: Segmentation Fault (core dumped) error during mt_prep_snap - #17 by ABraun

wharfbanger · January 31, 2022, 2:29pm

In my case this error was caused by failing to start a new project with a fresh INSAR_XXXXXXXX directory. Solved by clearing old files from the directory then rerunning mt_prep_snap.

SudiParwata · February 9, 2022, 7:27am

Hello Everyone,

I have a simple question regarding geocoding process.
In SNAP-StaMPS processing steps, in which step the geocoding is done?
I have checked one of xxxxx.rslc.par file in PSINSAR_20180425/rslc folder, it says “image_geometry: SLANT_RANGE”.
It means that the image is still in range and azimuth (radar coordinate) after “7ps_export.py”.
However, in matlab, when I run "ps_plot ‘u’ " after step-6 (StaMPS) the unwrapped phases is already in longitude and latitude coordinate.
So, is anyone know in which step the geocoding was done?
Thank you.

ABraun · February 15, 2022, 9:02am

the variables are explained in the script

github.com

dbekaert/StaMPS/blob/master/matlab/ps_plot.m

function [h_fig,lims,ifg_data_RMSE,h_axes_all]=ps_plot(value_type,varargin)
%function [h_fig,lims,ifg_data_RMSE,h_axes_all]=ps_plot(value_type,plot_flag,lims,ref_ifg,ifg_list,n_x,...
%    cbar_flag,textsize,textcolor,lon_rg,lat_rg)
% PS_PLOT plot ps values for selected ifgs
%    PS_PLOT(VALUE_TYPE,BACKGROUND,PHASE_LIMS,REF_IFG,IFG_LIST,N_X,...
%            CBAR_FLAG,TEXTSIZE,TEXTCOLOR,LON_RG,LAT_RG,UNITS) 
%
%    In the case of phase, +ve values imply displacement away from the satellite
%       when the master is earlier than the slave.
%    In the case of velocities, +ve values are towards the satellite.
%
%    an invalid VALUE_TYPE related to double removing of atmosphere:
%    anything when removing master and estimated tropospheric signals: 'ma'
%
%    valid VALUE_TYPE's are:
%%%% BASIC
%    'hgt'  for topography
%    'w'    for wrapped phase
%    'p'    for spatially filtered wrapped phase 
%    'u'    for unwrapped phase

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Sharon · February 25, 2022, 6:40am

Dear all,

I have got a PSInSAR result by applying snap2stamps package to process 177 images from 2014/10 to 2019/10.

Now, I want to analyze the time series after 2019/10.

Do you suggest to acquire the time series of surface deformation more than 6 years by PSInSAR method? I think it would be too long for PSInSAR analysis…

Or I could only process the images after 2019/6 (maybe a short overlap period with the previous result which end at 2019/10), and then connected these two time series? But they are with different master images and the distribution of PS pixels may be different. The time series may be acquired by calculated the mean displacement of PS pixels in a small region of the results based on two different time period.

Or…I need to apply the SBAS method to deal with this problem?

Hope someone could give me some suggestions. Thank you very much!

lidehua · March 7, 2022, 6:01am

Hi @bayzidul I was wondering if your first picture represents StaMPS successfully installed , Since my matlab cannot call stamps, I can’t judge whether I successfully installed stamps or whether there are problems in other links. We look forward to your reply

suribabu · March 7, 2022, 6:09am

Have you set the path of StaMPS in your Matlab?

lidehua · March 7, 2022, 6:18am

Sorry @suribabu First of all, does that picture represent a successful installation? Second, the tutorial I used didn’t teach me how to set StaMPS paths in MATLAB. Can you tell me how to do that，thank you very much.

suribabu · March 7, 2022, 6:24am

First of all, Click on ‘setpath’ in Matlab (window shows like below picture), In setpath window click on Add with subfolders… then select the StaMPS folder (the downloaded StaMPS path).
Once you will add the path, just run stamps(1,1) command in matlab.
But before running the stamps in Matlab, you should complete the mt_prep_snap step in terminal.