Are there some matlab programs or blocks to simulate radionavigation devices?

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Elangovan Sundaram

GPS Navigation tool from Matlab/Simulink Patch will work with suitable modification in flow chart may solve.

Abdelhakim El Ouadih

GPS is very common application but there is a problem to find such programs for the mean radionavigation aircraft components as INS ILS MLS VOR DME. thank you for your help.