/// <summary>
 /// 时段中是否包含某个时段
 /// </summary>
 /// <param name="span">时段</param>
 /// <returns>是否在其中</returns>
 public bool Contains(GnssTimeSpan span)
 {
     return((_end.CompareTo(span.End) >= 0) && (_start.CompareTo(span.Start) <= 0));
 }
 /// <summary>
 /// 时段中是否包含某个时刻
 /// </summary>
 /// <param name="time">时刻</param>
 /// <returns>是否在其中</returns>
 public bool Contains(GnssTime time)
 {
     return((time.CompareTo(_end) <= 0) && (time.CompareTo(_start) >= 0));
 }