[time-nuts] Re: GPS D (i.e. gpsd) roll over bug..Oct 24th
Magnus Danielson
magnus at rubidium.se
Fri Oct 22 20:03:36 UTC 2021
Björn,
The C/A code format have seen much greater changes before that. It's
extention from 24 to 32 birds was not small, neither was the addition of
the GPS-UTC corrections.
Cheers,
Magnus
On 2021-10-22 21:29, Björn wrote:
> âIt's actually a systemflaw that never was fixed in L1 C/A code. It would have been good if they added additional GPS-weeks bits in that signal, but it never materialiseras. It did for other newer signals.â
>
> The L1 C/A was optimised many decades ago. How Do you change the bitstream definition, considering several satellite generations running in parallel. Some approaching 20 years since launch. Many years more since design.
>
> How do you ensure that old and current working C/A-code receivers donât turn into unusable crap? (Including the systems they reside in)
>
> Systemflaw... for a system designed now yes. For one designed in the 70-ties, still running the show No. Not in my view.
>
>
> /Björn
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