Base line in SNAP

sentinelgyb · April 25, 2018, 8:14am

Hi，lidahai， sorry to your problem, I have no idea to find interfermetry pairs with baseline larger than 200m. Best wishs:sweat_smile:

ABraun · April 25, 2018, 8:35am

you can use the ASF baseline tool to identify image pairs with larger baselines:

lidahai · April 25, 2018, 12:24pm

Thanks anyway.The method provided by @ABraun turned out to be instrumental . Maybe you can try it next time.

sentinelgyb · April 25, 2018, 1:13pm

amazing! thanks! @lidahai @ABraun:grinning:

az_uct · September 26, 2018, 9:20am

Hi @ABraun

I have a -ve perpendicular baseline. It is my understanding that the optimal Bperp is between 150m & 300m. Does this also apply to its negative counterparts: -150m & -300m? Thanks

mengdahl · September 26, 2018, 9:47am

Yes, the sign only indicates on which “side” the slave acquisition is from the master acquisition. If you reverse the master and slave the sign changes.

az_uct · September 26, 2018, 10:00am

thank you @mengdahl, much appreciated

arashkabak · November 28, 2018, 8:47am

Hello falahfakhri. What is the shortcut to the baseline?Thanks.

khakim · February 6, 2019, 3:14am

Hi ABraun,

Some months ago I could create a baseline chart using the ASF baseline tool as in video you uploaded, but Now, this tool seems to be different. I cannot switch to SBAS beta from PS baseline chart as below

ABraun · February 6, 2019, 4:49am

I have no idea, sorry.

chayma · November 19, 2019, 4:37pm

Hello,

I found a problem while trying to plot the baseline chart using the ASF baseline tool. I can’t get the plot for any Sentinel1 granule. Does anyone have the same problem? Could you please suggest solution to get the baseline chart?
Thank you.

ABraun · November 19, 2019, 6:06pm

It was reported here yesterday: Baseline Tool

No solution however yet, hopefully this bug will ne fixed soon. Has anyone reported it to ASF yet?

rahatmalik47 · November 21, 2019, 1:51pm

@ABraun yes i reported through ASF feedback portal

chayma · November 21, 2019, 10:59pm

The ASF baseline tool is now working

kamal_mtu · November 5, 2020, 12:22pm

Hi all,
I am not sure if I am doing it right by reactivating this thread but I have found something that is a bit confusing to me. Please forgive me it this is my ignorance as I am somewhat new to interferometry.

I also need to find out the Bperp for the S1A data pair that I have downloaded. I tried it in SNAP and it is giving me |8.29| m while the same data pair is giving me |1| m in ASF Baseline tool. Please have a look at the figs attached.
It will be highly appreciated if someone may please help me in understanding why this difference has arisen here.
Thank you in advance.

ABraun · November 5, 2020, 12:26pm

maybe the ASF data uses different orbit information. Have you applied orbit files in SNAP already?

sumiya · November 14, 2020, 8:53am

is that webserver error or i selected unnormal image pairs here. It is Alaska server

mengdahl · November 15, 2020, 12:24pm

Most of the baselines appear to be zero in that plot - not realistic.

suribabu · July 6, 2021, 12:37am

Dear ABraun,
How can I export these above values (show in the figure) into a CSV file? I try to copy these above values in CSV file but the copy option is not working.
Because it is very difficult to enter manually.

ABraun · July 6, 2021, 5:32pm

if you have already conducted the coregistration, you can open the InSAR Stack tool (Tool > Windows > Radar > InSAR Stack) which allows to export the values