code: func calcJulianDay(numDays int64, secondsNorm []float64, utcOffset float64) (julianDay []float64) {
  	for index := 0; index < len(secondsNorm); index++ {
  		temp := float64(numDays) + 2415018.5 + secondsNorm[index] - utcOffset/24.0
  		julianDay = append(julianDay, temp)
  	}
  	return
  }
docs: // Calculate Julian Day based on the formula: nDays+2415018.5+secondsNorm-UTCoff/24
  // numDays - The number of days calculated in the calculate function
  // secondsNorm - Seconds normalized calculated by the createSecondsNormalized function
  // utcOffset - UTC offset defined by the user
  // Return Julian day slice