Radar is a skill that allows you to use various radars.
Training Radar costs skill points equal to the desired level.

Where to Train

Location	Base Name	Level	Requirements	Notes
Sol	Earth Central	5	None
Sol	Earthforce Headquarter	6	Enforcer Rank
Shadow		11	Kromatico	Drop from Monochrome Hues
Handel's Cove		16	Kromatico	Drop from Monochrome Hues
XYZ at Z base		18	Tunnel Vision
The Dark		19	Transformed Very Dark Matter	Mission reward
The Dark		20	Transformed Impossibly Dark Matter	Mission reward
Lyceum		21	Several Olympus Uber Kills (Mission-Based)	Requires level 1000

Galaxies with high levels in Current Universe (June 2012)