vce is a cloud framework to prototype and emulate satellite applications.
It provides support for orbits calculation, network latency/bandwidth emulation, instrument control by the application, and constellation monitoring (positions, CPU/memory/disk/network usage, configuration changes made to the emulated onboard instruments).
The state of everything in the constellation is saved in a time series database (InfluxDB). This database can be inspected after running the emulation scenario.
- Each satellite runs in an AWS instance which is part of an AWS CloudFormation stack.
- Networking parameters are set (through
tcconfig and the
netem
component of the Linux kernel) by
vce agent, which runs on each node and polls the current value of the parameters from the time series database. - Networking parameters are saved in the database by
vce linksin real-time. - Satellite positions are stored in advance by
vce orbits, which is run at the beginning of the emulation. - Resource usage measurements are collection on each AWS instance by running collectd and sending the data to InfluxDB.
- Timeseries of usage measurements, satellite positions (on a map), and instruments state can be visualized and analyzed using grafana.
To install all development dependencies, just clone this project and then run:
make initThis will create a Python 3.7 virtual environment using pipenv.