Hello everyone,
this is my first post here, and first of all I wanted to thank you for the great work and active community around this project.
I am embarking right now in a tool, which requires calculation of GEO-LEO optical link visibility computations for the purpose of calculating possible communication windows, given a time interval.
The tool would get OEM orbit data as inputs and calculate the visibility constraints like LoS, Sun blinding, eclipse, terminal masking, etc.
I then need to display in a GUI (I was thinking to use CesiumJs) the results in terms of orbits, ground tracks and links during the visibility windows.
Given also the performance requirements, I found Orekit in java to be the best candidate for this kind of tool.
I have a few questions before I embark on the journey of learning Orekit, to avoid reinventing the wheel:
are there existing Orekit projects which do this kind of tasks?
I have seen OraaS, which does some LoS calculations with Orekit and interfaces with CesiumJs for the frontend: is the source code available to have a look and reuse it in a local environment? I would have to modify it anyway to get data in OEM format.
The goal is to have something working like the Cesium SandCastle Demo Cesium Sandcastle, with Orekit as backend.
Hello @candlelight, this is not released yet, but I am working on a project that aims at using Orekit to generate CZML files (files that CesiumJs can read).
This project is named OreCzml and is nearly finished. I think it can answer to a lot of topics that you are trying to adress in terms of display using Orekit. For example it already handles :
The display of ground tracks
The display of bodies like the sun and other objects
Lines of visibility between a satellite and a ground station (visibility windows)
Oem as input to build objects
So I highly recommend you to see this project that I designed especially for this type of situations. I also did a local cesium interface that you can run into your computer available here. I did this interface because the sandcastle can’t really handle big czml files.
If you have questions do not hesitate, this project is not released yet, so it could still have bugs (even if it is tested).
Hi @Zudo, this project is very cool and looks like in the very direction of what I want to achieve!
I will have a better look into it in the next days and will contact you in case I have questions
Thanks for sharing!
Hi @Zudo, I was finally having a bit of time today to get into the topic.
Bare with me, because, although I am familiar with SW programming in general, I am quite new to Maven (and Java).
So I would like to ask you for some support.
I was able to successfully run a ‘mvn clean install’ in the main root oreczml folder to build the packages with the dependencies.
Now, I am unsure how to proceed in order to run one of the examples, let’s say the FieldOfObservationExample.java. Would you please take some time and patience to explain how to achieve that? From my understanding I have somehow to modify the pom.xml file to point to the mainClass, but not sure how to do that and finally run the demo, with CesiumJS also up.
Thank you!
