[time-nuts] no 23:59:60 in TAC32

Bill Beam wbeam at gci.net
Sat Dec 31 23:45:15 EST 2005


I have since compared UT+ raw data with TAC32 display
as follows:

UT+ raw data             TAC32 display

12/31/05 23:59:59     same
12/31/05 23:59:60     1/1/06 00:00:00
12/31/05 23:59:60     1/1/06 00:00:01
1/1/2006 00:00:00     1/1/06 00:00:01
1/1/2006 00:00:01     same

I assume the UT+ raw data is correct UTC.
During the  23:59:60 UTC second TAC32 gave two displays.

The TAC32 apears to have 'stumbled' for a couple of seconds.
The UT+ performed correctly.

I obtained my data using a Nikon D70 digital still camera
operated in 'burst' mode taking about three frames per second
of the computer screen.  Both the TAC32 display and UT+
raw data are shown together on the screen.

If any one is interested I can send the data. I have 19 images.
Each image is about 3MB.


On Sat, 31 Dec 2005 22:05:14 -0600, Brian Kirby wrote:

>I was using a M12+ with TAC32+ - what I observed is it displayed 
>00:00:01 twice ! - it never indicated 23:59:60.
>
>Bill Beam wrote:
>
>>TAC32 failed to display 23:59:60.
>>
>>Within a few seconds (possibly/probably one second)
>>the TAC32 time display was correct.
>>
>>The raw data stream from Motorola UT+ correctly
>>showed 23:59:60 as the last second of 2005.
>>
>>TAC32 queries the UT+ for UTC-GPS offset at 20sec
>>after each minute and at 00:00:22 'UTC=GPS+14 seconds'
>>was correctly displayed.
>>
>>I have lots of uninteresting photos of TAC32 display...
>>and one interesting photo of the raw data stream from
>>the UT+.  If anyone cares to post it I can send a photo.
>>


Bill Beam
NL7F
wbeam at gci.net or NL7F at amsat.org





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