code: func (t Time) TimeSinceGPSEpoch() time.Duration {
  	var offset time.Duration
  	for _, ls := range leapSecondsTable {
  		if ls.Time.Before(time.Time(t)) {
  			offset += ls.Duration
  		}
  	}
  
  	return time.Time(t).Sub(gpsEpochTime) + offset
  }
docs: // TimeSinceGPSEpoch returns the time duration since GPS epoch, corrected with
  // the leap seconds.