Error using sb_invert_uw in StaMPS step 6 of small baselines

[Arc Huang]

Hi,

When I running StaMPS with the Small Baselines. I got the following error at step 6.

Unwrapping in space...
   Processing IFG 1 of 11
   Processing IFG 2 of 11
   Processing IFG 3 of 11
   Processing IFG 4 of 11
   Processing IFG 5 of 11
   Processing IFG 6 of 11
   Processing IFG 7 of 11
   Processing IFG 8 of 11
   Processing IFG 9 of 11
   Processing IFG 10 of 11
   Processing IFG 11 of 11
Unwrapping from grid...
PS_UNWRAP: Finished
SB_INVERT_UW: Starting
8060 ref PS selected
Error using sb_invert_uw (line 72)
There are isolated subsets (cannot be inverted w.r.t. master)

Error in stamps (line 206)
        sb_invert_uw

Could anyone help with it?

Thanks in advance,
Arc

[Anton Filatov]

Dear Arc,
I think you should relaunch sb_find step and set its parameters in appropriate way in order to exclude isolated subsets.
Try to set higher normal baseline limit and also reduce Rho parameter value, thus you can increase number of connections.
Best regards,
Anton Filatov.

22.06.2014 12:54 пользователь "Arc Huang" <arc....@gmail.com> написал:

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[Arc Huang]

Hi Anton,

Thank you for your fast reply with my stupid mistake.

Now it is solved.

Regards,

Arc Huang

[高明亮]

Hi,Arc

     How did you solve this problem? I think I met the same one:


########################################
############ StaMPS Step 6 #############
########################################

PS_UNWRAP: Starting
Phase-unwrapping...
GETPARM: small_baseline_flag='y'
GETPARM: unwrap_patch_phase='n'
GETPARM: scla_deramp='n'
GETPARM: drop_ifg_index=
GETPARM: unwrap_time_win=730
GETPARM: unwrap_method='3D_QUICK'
GETPARM: unwrap_grid_size=200
GETPARM: unwrap_gold_n_win=32
GETPARM: unwrap_prefilter_flag='y'
GETPARM: unwrap_gold_alpha=0.8
GETPARM: unwrap_la_error_flag='y'
GETPARM: unwrap_spatial_cost_func_flag='n'
GETPARM: max_topo_err=5
GETPARM: lambda=0.031
PS_UNWRAP: n_trial_wraps=0.218767
Resampling phase to grid...
   Number of interferograms  : 36
   Number of points per ifg  : 136138
   Number of resampled points: 26367
Interpolating grid...
Warning: DSEARCH will be removed in a future release. Use DelaunayTri/nearestNeighbor instead.
> In dsearch at 24
  In uw_interp at 52
  In uw_3d at 151
  In ps_unwrap at 177
  In stamps at 204
   Number of unique edges in grid: 53963
Unwrapping in time-space...
   Estimating look angle error (elapsed time=6s)
   Smoothing in time (elapsed time=13s)
Warning: Rank deficient, rank = 27,  tol =    1.5987e-14.
> In uw_sb_unwrap_space_time at 307
  In uw_3d at 152
  In ps_unwrap at 177
  In stamps at 204
   50 edges with high std dev in time (elapsed time=13s)
Unwrapping in space...
   Processing IFG 1 of 36
   Processing IFG 2 of 36
   Processing IFG 3 of 36
   Processing IFG 4 of 36
   Processing IFG 5 of 36
   Processing IFG 6 of 36
   Processing IFG 7 of 36
   Processing IFG 8 of 36
   Processing IFG 9 of 36
   Processing IFG 10 of 36
   Processing IFG 11 of 36
   Processing IFG 12 of 36
   Processing IFG 13 of 36
   Processing IFG 14 of 36
   Processing IFG 15 of 36
   Processing IFG 16 of 36
   Processing IFG 17 of 36
   Processing IFG 18 of 36
   Processing IFG 19 of 36
   Processing IFG 20 of 36
   Processing IFG 21 of 36
   Processing IFG 22 of 36
   Processing IFG 23 of 36
   Processing IFG 24 of 36
   Processing IFG 25 of 36
   Processing IFG 26 of 36
   Processing IFG 27 of 36
   Processing IFG 28 of 36
   Processing IFG 29 of 36
   Processing IFG 30 of 36
   Processing IFG 31 of 36
   Processing IFG 32 of 36
   Processing IFG 33 of 36
   Processing IFG 34 of 36
   Processing IFG 35 of 36
   Processing IFG 36 of 36

Unwrapping from grid...
PS_UNWRAP: Finished
SB_INVERT_UW: Starting

136138 ref PS selected
??? Error using ==> sb_invert_uw at 72

There are isolated subsets (cannot be inverted w.r.t. master)

Error in ==> stamps at 206
        sb_invert_uw

Could you help me?a

Best regards,

Melon

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首都师范大学

[Arc Huang]

Hi Melon,

You can go back to INSAR_masterdate and run "plot_sb_baselines" to check if you only have only one subset.

If not, edit the small_baselines.list to add more connections.

Then after redo the make_small_baselines, everything should be fine.

Regards,

Arc

[高明亮]

Hi, Arc,

The connections is plotted above. I wonder if there is any thing wrong.

​

[Arc Huang]

Hi Melon,

You have 6 subsets now.

You have to make at least 5 more connections by editing the small_baselines.list to make it only 1 subset.

i.e. every 2 points are connected.

[高明亮]

Hi Arc,

     Thanks for your instructions~

     So, I need to redo all the following commands not only the make_small_baselines? Because I tried stamps(6) but it still didn't work.
   

Yours regards,

Melon

[Arc Huang]

Hi Melon,

After you recheck the connection diagram and everthing looks good.

Yes, I guess you have to redo all of the command after make_small_baselines.

[高明亮]

Hi Arc,
    Thanks very much.
    And I will try it again~

    By the way, it really a huge cost of time and I am going to mad!

Yours regards,

Melon

[高明亮]

Hi Arc,
    Thanks very much.
    And I will try it again~

    By the way, it is really a huge cost of time and I am going to mad!

Yours regards,

Melon