[time-nuts] Traceability after loss of LORAN and WWVB

Bob Camp lists at rtty.us
Fri May 31 18:12:39 EDT 2013


This is a bit of a memory test, so I may indeed fail…

Back in the day, I seem to recall the timing charts for LORAN being USNO publications rather than NIST tables. Thus LORAN was traceable to USNO rather than NIST. These days we have NIST tables indexed by GPS SV for the entire constellation that are very similar to the old LORAN tables. 

It's been ~30 years since I played with the tables, but I believe that was the case….


On May 31, 2013, at 3:14 PM, Scott McGrath <scmcgrath at gmail.com> wrote:

> How are those of you dealing with traceability in the commercial space after loss of LORAN and WWVB
> I as does everyone here know that both a Cs and H-maser are both primary standards
> This is how does one do the contract/purchasing agent checkbox 'is traceable to NIST Yes or No' 
> Back in the day the old LF standards both were directly traceable to NIST
> The GPS constellation is traceable to USNO but USNO is not NIST 
> This is a question where one must think like a lawyer not an engineer
> Thanks!
> Sent from my iPhone
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