[Sea-time] Existing Time Management BoF charter & supporting material

[Jon Hamkins]

Thanks, Peter.

The IOAG Service Catalog requests the following standards be developed:

• Clock Correlation Procedures [CC] - Magenta Book
• Time Transfer [TT] - Blue Book
• Time Synchronization [TS] - Blue Book

Do we all agree that these are still the appropriate books and colors to 
be working toward?  Do we need to update our goals?  Thoughts?

On a separate topic, I have been thinking about what we discussed in 
Berlin.  We mentioned time correlation and time synchronization as two 
motivations for the work.  As we discussed, time correlation is 
determining the offset between two clocks, and time synchronization is 
setting two clocks so that they match.  The difference between these 
concepts is quite small -- a time synchronized clock output is simply 
the time correlated clock output time plus the value of the offset.  In 
other words, after time correlation, a time offset is determined. 
Whether this offset is used to explicitly synchronize a clock or is 
simply added to the clock output each time it is read is an 
implementation detail.  For this reason, I recommend that going forward, 
we consider time correlation and time synchronization to be 
fundamentally the same concept, with the same time correlation standard 
governing them.

      ----Jon
On 11/5/2018 5:21 PM, Shames, Peter M (312B) wrote:
> Dear Time BoF,
> 
> Attached is the current draft of the Time WG Charter and also the IOAG 
> Service catalog #2.  See pgs 26-27, section 4.5, to see what it is that 
> the IOAG has requested.  There is also an existing set of materials 
> relating to this topic that Ed Greenberg developed.
> 
> 
> _______________________________________________
> SEA-TIME mailing list
> SEA-TIME at mailman.ccsds.org
> https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sea-time
>