some errors in stamps(7,7) about the reference PS points selected

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yu xuan

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Jul 1, 2019, 5:18:39 AM7/1/19
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Hello everyone:

According to the parameters about reference points applied to the step7 as follows:

>>setparm('ref_centre_lonlat',[]);

>> setparm('ref_radius', 0);  

>> setparm('ref_lat',[31.4 31.5]);  

>> setparm('ref_lon',[92 92.1]);

The stamps would display error information:' Ifg ** is not deramped' and when I typed ’plot_ps(‘v-do’)’ the matlab showed 'Interferogram(1) does not have a reference area!'. 


I changed the some parameters:

>> setparm('ref_centre_lonlat',[92.0748 31.48]);

>> setparm('ref_radius', 10000);

>> setparm('ref_lat', []); 

>> setparm('ref_lon',[]);

it still had the wrong information: 'Ifg ** is not deramped 'and showed the error in the 'ps_setref 'code.


 Anyone can help me, I will appreciate you!

                                                                            Zzx

David Bekaert

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Jul 2, 2019, 10:14:11 AM7/2/19
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Error or warning?
Can you copy the complete message.
Also provide background information on the processing, i.e. SB or PS etc.


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yu xuan

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Jul 25, 2019, 10:21:13 AM7/25/19
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Professor David Bekaert, I am sorry to reply you so late. The attachment named picture1.png shows this question. And now, I meet a new question, when I used the data from the ISCE processing for StaMPS, in patch folder the 'pscands.hgt' file just has tens of kb(picture2.png shows more information about patch folder), It maybe cause the less PS points (just only hundreds of PS points ). the code I uesd as the follow:
      mt_prep_isce 0.4 9 6  200 50 
     the range_looks is 40, the azimuth_looks is 10.
 Can you tell me how to solve my question? I'll be very grateful to you. 
                                                                                                                      A new user for StaMPS
在 2019年7月2日星期二 UTC+8下午10:14:11,David Bekaert写道:
Error or warning?
Can you copy the complete message.
Also provide background information on the processing, i.e. SB or PS etc.


On Mon, 1 Jul 2019 at 05:18, yu xuan <27880...@gmail.com> wrote:

Hello everyone:

According to the parameters about reference points applied to the step7 as follows:

>>setparm('ref_centre_lonlat',[]);

>> setparm('ref_radius', 0);  

>> setparm('ref_lat',[31.4 31.5]);  

>> setparm('ref_lon',[92 92.1]);

The stamps would display error information:' Ifg ** is not deramped' and when I typed ’plot_ps(‘v-do’)’ the matlab showed 'Interferogram(1) does not have a reference area!'. 


I changed the some parameters:

>> setparm('ref_centre_lonlat',[92.0748 31.48]);

>> setparm('ref_radius', 10000);

>> setparm('ref_lat', []); 

>> setparm('ref_lon',[]);

it still had the wrong information: 'Ifg ** is not deramped 'and showed the error in the 'ps_setref 'code.


 Anyone can help me, I will appreciate you!

                                                                            Zzx

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picture1.png
picture2.png

David Bekaert

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Jul 25, 2019, 10:36:22 AM7/25/19
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Can you confirm that this patch you are plotting has data in this region of the reference.
Suggest you load ps2.mat variable and plot the lon lat in it on a figure.
Also draw the region that you are using for a reference.

Cheers,
D.


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yu xuan

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Jul 25, 2019, 9:15:08 PM7/25/19
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Professor, all of patchs have the same situation (the pscands.hgt does not exceed 200kb ).  It seems impossible all of patchs in my region have no date.
在 2019年7月25日星期四 UTC+8下午10:36:22,David Bekaert写道:
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fırat altıntaş

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Jul 26, 2019, 5:46:41 PM7/26/19
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Hello,

Did you check your ref_centre_lonlat point area ? could you sea any PS point near there ? and when you check it from google earth,  how long distance between your ref_point to one of the most close PS point ? if it is seen like 5-6 m, then you should make your ref_radius 6 m then try it again. And also for longitude and latitude coordinates maybe you should use more certain coordinates as 92.0748 , not like 31.48 or 31.5

ı hope it can help

qingh bao

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Sep 29, 2023, 4:28:41 AM9/29/23
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Dear all, I also have the same problem when I do SBAS-InSAR and use ps_plot('V-dao','a_gacos',-1)QQ图片20230929162459.png
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