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Discussion of precise time and frequency measurement

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Lady Heather and LeapSecond

MS
Mark Sims
Fri, Nov 4, 2016 9:36 PM

Yes,  and it will also automatically do a screen dump to the file "leap_sec.gif"  That all assume that the GPS device reports a leap second as 23:59:60.  Some devices duplicate 23:59:59 or 00:00:00  I have also seen one say 00:00:60

The next version of Lady Heather internally handles time differently.  Instead of dragging around variables for year,month,day,hours,minutes,seconds,fractions-of-second, it now keeps time in double precision Julian date variables (for gps, utc, local, and astronomical times).  When those are converted to hours/minutes/seconds for display the 23:59:60 was coming out 00:00:00 .  I had to implement a special flag that says to show it as 23:59:60  ...  hopefully that all works...  it did when my Z3801A did a false leap-second at the end of September.

Yes, and it will also automatically do a screen dump to the file "leap_sec.gif" That all assume that the GPS device reports a leap second as 23:59:60. Some devices duplicate 23:59:59 or 00:00:00 I have also seen one say 00:00:60 The next version of Lady Heather internally handles time differently. Instead of dragging around variables for year,month,day,hours,minutes,seconds,fractions-of-second, it now keeps time in double precision Julian date variables (for gps, utc, local, and astronomical times). When those are converted to hours/minutes/seconds for display the 23:59:60 was coming out 00:00:00 . I had to implement a special flag that says to show it as 23:59:60 ... hopefully that all works... it did when my Z3801A did a false leap-second at the end of September.
N
n3izn@aol.com
Sun, Nov 6, 2016 12:09 AM

Where will the file go?

-----Original Message-----
From: Mark Sims holrum@hotmail.com
To: time-nuts time-nuts@febo.com
Sent: Fri, Nov 4, 2016 2:37 pm
Subject: [time-nuts] Lady Heather and LeapSecond

Yes,  and it will also automatically do a screen dump to the file "leap_sec.gif" That all assume that the GPS device reports a leap second as 23:59:60.  Some devices duplicate 23:59:59 or 00:00:00  I have also seen one say 00:00:60

The next version of Lady Heather internally handles time differently.  Instead of dragging around variables for year,month,day,hours,minutes,seconds,fractions-of-second, it now keeps time in double precision Julian date variables (for gps, utc, local, and astronomical times).  When those are converted to hours/minutes/seconds for display the 23:59:60 was coming out 00:00:00 .  I had to implement a special flag that says to show it as 23:59:60  ...  hopefully that all works...  it did when my Z3801A did a false leap-second at the end of September.


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Where will the file go? -----Original Message----- From: Mark Sims <holrum@hotmail.com> To: time-nuts <time-nuts@febo.com> Sent: Fri, Nov 4, 2016 2:37 pm Subject: [time-nuts] Lady Heather and LeapSecond Yes, and it will also automatically do a screen dump to the file "leap_sec.gif" That all assume that the GPS device reports a leap second as 23:59:60. Some devices duplicate 23:59:59 or 00:00:00 I have also seen one say 00:00:60 The next version of Lady Heather internally handles time differently. Instead of dragging around variables for year,month,day,hours,minutes,seconds,fractions-of-second, it now keeps time in double precision Julian date variables (for gps, utc, local, and astronomical times). When those are converted to hours/minutes/seconds for display the 23:59:60 was coming out 00:00:00 . I had to implement a special flag that says to show it as 23:59:60 ... hopefully that all works... it did when my Z3801A did a false leap-second at the end of September. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.