Question about example Track Corridor

1

Python example Track Corridor, there is an error at runtime, the error occurs on this line: propagator.propagate(start, start.shiftedBy(DURATION)).Can anyone help me！Thanks!
JavaError: <super: <class ‘JavaError’>, >
Java stacktrace:
java.lang.RuntimeException: AttributeError
at org.orekit.propagation.sampling.PythonOrekitFixedStepHandler.handleStep(Native Method)
at org.orekit.propagation.sampling.OrekitStepNormalizer.handleStep(OrekitStepNormalizer.java:111)
at org.orekit.propagation.sampling.StepHandlerMultiplexer.handleStep(StepHandlerMultiplexer.java:184)
at org.orekit.propagation.analytical.AbstractAnalyticalPropagator.acceptStep(AbstractAnalyticalPropagator.java:336)
at org.orekit.propagation.analytical.AbstractAnalyticalPropagator.propagate(AbstractAnalyticalPropagator.java:153)

2

Hi,

It is hard to troubleshoot based on this minimum of information, but to get started i recommend:

  • Clone the orekit-python-wrapper repo: https://gitlab.orekit.org/orekit-labs/python-wrapper
  • Open the repository in vscode and open it using the devcontainer that contains a pre-setup environment based on orekit v12.0
  • The notebook can be run and edited in vscode directly without additional settings, I can confirm it works in the dev container (based on python 3.11 and orekit v12.0)

Regards

2 Likes
3

Ok thanks. I’ll try again.

4

Hello, I use jupyter notebook, in the example Track Corridor I have the following problem. The rest of the examples are fine.

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5

Hello, can you provide me with the version number of cartopy you are using?

6

The problem has been solved. Thank you!

1 Like
7

Hello - new here on the Orekit forum.

I am getting the very same error as newWL using a jupyter notebook - any chance you can share how the problem was solved?

I am using cartopy 0.22.0, python 3.10.13 and orekit 12.0.1. I do not have vscode installed - I could do this, but am quite new to this tool (and Java) so would likely not be able to debug very efficiently.

I guess I am wondering about this example in general. Is there documentation on this example elsewhere? For example the ANGULAR_OFFSET = 35 - is this in arcminutes or something representing say the 3dB beamwidth of a tracking antenna?

Fiinally I am trying the debug facility in jupyterlab to look at this - it doesn’t seem very compatible (ipykernel keeps restarting) - can you confirm that debugging this way is not recommended or doesn’t work?

8

Try using Orekit 12.0, hopefully it can help you.

9

Hi,

You are right, the v12 version wasn’t committed in the update. I have now commited the updated version and verified that it works in the devcontainer that is part of the repo (if one uses vscode).