LocalTimeToGMT:

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   Compute the Julian Date from the local time.
   This does not handle daylight savings time, etc.

   Since version 9.
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   Form:
   jD = LocalTimeToJD( dateTime, lat, lon )
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   ------
   Inputs
   ------
   datetime      (1,6) [year month day hour minute seconds]
                       or the datetime data structure.
                               .year
                               .month                             
                               .day                             
                               .hour                             
                               .minute                             
                               .second
   lon           (1,1)  Longitude in radians
                       

   -------
   Outputs
   -------
   datetimeGMT    (1,6) [year month day hour minute seconds]
                       or the datetime data structure.
                               .year
                               .month                             
                               .day                             
                               .hour                             
                               .minute                             
                               .second
   jD             (1,1) Julian date 

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Children:

Common: Time/Date2JD
Common: Time/JD2Date