 
 <prompt> Wetin be the role of Compass-M1 like Given the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context: <response>: ```Compass-M1 na one experimental satellite wey dem launch for signal testing and validation and for the frequency filing on 14 April 2007. The work wey Compass-M1 dey do for Compass na similar to the work wey the GIOVE satellites dey do for the Galileo system. The orbit of Compass-M1 dey nearly circular, e get altitude of 21,150 km and an inclination of 55.5 degrees.``` 