Apply-orbit-file fails with gpt

Microwave Toolbox
1

Good morning,

Has anyone run into an error when applying a graph with gpt to an S-1 burst file? I get a “connect timed out” error (see below) when running the apply-orbit-file command.

I’ve been getting this error just recently; before, it was working alright.

The same graph runs without any problem inside SNAP 12.

Thanks!

INFO: org.esa.snap.core.gpf.operators.tooladapter.ToolAdapterIO: Initializing external tool adapters
INFO: org.esa.snap.core.util.EngineVersionCheckActivator: Please check regularly for new updates for the best SNAP experience.
Executing processing graph
INFO: eu.esa.sar.commons.io.ImageIOFile: Using FileCacheImageInputStream
INFO: eu.esa.sar.commons.io.ImageIOFile: Using FileCacheImageInputStream
WARNING: eu.esa.sar.orbits.io.sentinel1.OrbitFileScraper: Unable to connect to http://step.esa.int/auxdata/orbits/Sentinel-1/POEORB/S1A/2019/03/: Connect timed out
WARNING: eu.esa.sar.orbits.io.sentinel1.OrbitFileScraper: Unable to connect to http://step.esa.int/auxdata/orbits/Sentinel-1/POEORB/S1A/2019/02/: Connect timed out
WARNING: eu.esa.sar.orbits.gpf.ApplyOrbitFileOp: No valid orbit file found for 04-MAR-2019 09:22:35.418420

2

Hi Joao,

Could you attach the graph?

Thanks!

3

Hi Diana,

Sure
S1_SLC_to_C2TC_unfilt.xml (7.2 KB)
, it’s attached

Thank you!

4

Hi Joao,

I wasn’t able to reproduce the issue on my side. Could you please try accessing the http://step.esa.int/auxdata/orbits/Sentinel-1/POEORB/S1A/2019/03/ link from your command line using curl and let me know the result?

Thanks,
Diana

5

Hi Diana,

From my office computer I get:

curl: (28) Failed to connect to step.esa.int port 80 after 21107 ms: Could not connect to server

We have a proxy that is properly configured in SNAP, but for some time, I’m also getting this error when testing the connection:

Unable to tunnel through proxy. Proxy returns “HTTP/1.1.407 Proxy Authentication Required”

I will try at home this evening, when this proxy thing is not an issue.

Thank you for your ongoing support
Joao

6

Sorry, a quick addition to my latest message: using the batch processing tool inside SNAP with the same graph does not give me the error that I get when using gpt.

7

Can you try applying the solution described here and see if it makes a difference?
https://senbox.atlassian.net/wiki/spaces/SNAP/pages/1898053693/SNAP+FAQs#I’m-behind-a-proxy-and-having-difficulties-connecting-to-servers.-What-can-I-do%3F

8

Dear Diana,

I applied that solution, but the same error persists.

Last night I ran the same graph with gpt on my personal computer at home, and it worked.

What I find strange is that when I’m behind a proxy, I can run the same graph inside SNAP with the batch processing tool. The problem seems to be when I need to use the gpt command.

9

We are still unable to reproduce the problem. A Jira ticket (SNAP-4080) has been created to track this issue.