mirror of
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59 lines
2.7 KiB
Markdown
59 lines
2.7 KiB
Markdown
# 3lips
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Target localisation for multi-static radar using ellipse intersections. Not a dating app.
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See a live instance at [http://3lips.30hours.dev](http://3lips.30hours.dev).
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## Features
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- Provides a JSON API for geolocation of targets given [blah2](http://github.com/30hours/blah2) radar nodes.
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- Uses a [CesiumJS](http://github.com/CesiumGS/cesium) web front-end to visualise data.
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- Ability to compare a number of algorithms for target localisation.
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## Usage
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- Install docker and docker-compose on the host machine.
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- Clone this repository to some directory.
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- Edit the [config/config.yml](config/config.yml) file for scenario.
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- Run the docker compose command.
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```bash
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sudo git clone http://github.com/30hours/3lips /opt/3lips
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sudo docker compose up -d —build
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```
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The API front-end is available at [http://localhost:49156](http://localhost:49156).
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## Method of Operation
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The association uses the following algorithm:
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- ADS-B associator will associate the closest target within some delay and Doppler around the truth.
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The target localisation uses 1 of the following algorithms:
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- **Ellipse parametric** samples an ellipse (2D) at 0 altitude. Find intersections between 3 or more ellipses such that the distance to each point is under some threshold.
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- **Ellipsoid parametric** samples an ellipsoid (3D). Find intersections between 3 or more ellipsoids such that the distance to each point is under some threshold.
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- **Spherical intersection** a closed form solution which applies when a common receiver or transmitter are used. As described in [Two Methods for Target Localization in Multistatic Passive Radar](https://ieeexplore.ieee.org/document/6129656).
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The system architecture is as follows:
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- The API server and HTML pages are served through a [Flask](http://github.com/pallets/flask) in Python.
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- An initial API request with a new set of parameters (algorithms or radar nodes) will add these parameters to a common processing loop. This is so fair comparisons can be made on the same input data.
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- A set of API parameters will continue to be processed unless there is no API call in some specified time - see *main.py* to update. This allows the latest geolocation to be provided, rather than adding to the processing loop and waiting for the update from the next time increment.
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## Future Work
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- Implement an association algorithm that is not reliant on ADS-B truth.
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- Choose to use detection or track data from each radar.
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- Long term plots to show metrics such as 2D location accuracy to ADS-B, number of aircraft tracked, etc.
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- Scale number of samples in ellipse/ellipsoid to size of shape.
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## License
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[MIT](http://choosealicense.com/licenses/mit)
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