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# Global rc simulation parameters

Default global simulation parameters used as a base layer for all instruments. 

Also accessible via an empty `scopesim.UserCommands()` or via an empty `scopesim.OpticalTrain()`object

```{code-cell} ipython3
import scopesim

scopesim.rc.__currsys__["!SIM.random.seed"] = 9001
scopesim.rc.__currsys__["!SIM.file.local_packages_path"] = "./"

scopesim.rc.__currsys__["!SIM"]
```