code: func GenerateCoordinate(rtt time.Duration) *coordinate.Coordinate {
  	coord := coordinate.NewCoordinate(coordinate.DefaultConfig())
  	coord.Vec[0] = rtt.Seconds()
  	coord.Height = 0
  	return coord
  }
docs: // GenerateCoordinate creates a new coordinate with the given distance from the
  // origin. This should only be used for tests.