各种时间之间的转换，包括：
将GPS周和周内秒转换到公历时间，
由公历日期和GPS周内秒计算公历时间，
将公历GPS时间转换到GPS周和周内秒，
将简化儒略日转换到公历时间，
将公历时间转换到简化儒略日，
从儒略日计算公历时间，
将公历时间转换到儒略日等。(The conversion between various times, including:
Conversion of GPS weeks and weeks to the calendar time,
The calendar time is calculated from the date of the calendar and the seconds within GPS weeks.
The GPS time of the calendar is converted to GPS weeks and within seconds,
Julian day will simplify the conversion to the calendar time,
The Gregorian calendar time to simplify the Julian day,
Calculate the Gregorian calendar time from Julian day,
Convert calendar time to Julian day.)