[time-nuts] Jupiter GPS Question

bg at lysator.liu.se bg at lysator.liu.se
Wed Dec 2 10:25:56 UTC 2009


SBAS (WAAS/EGNOS/etc) use L1 carrier frequency and "compatible" PRN codes,
but the datamessage goes at a higher rate (200bps (?)) than the normal GPS
which uses 50 bits per second. This means that most receiver will have
added dedicated/modified hardware for SBAS signals reception.

--

   Björn

> Talking of which, I have been wondering if our beloved Thunderbolts
> could handle WAAS/EGNOS.  I can't see any way to configure the current
> software - doubtless an upgrade would be required, but does the
> hardware have the capability? Does anybody have any thoughts?
>
>      TTFN,
>
>            Peter
>
>
> 2009/12/1 Magnus Danielson <magnus at rubidium.dyndns.org>:
>> David Pritchard wrote:
>>>
>>> Hi,
>>>
>>> I am trying to add DGPS capability to an older Rockwell Jupiter GPS
>>> module. I have a known good DGPS receiver and have tried to interface
>>> it to
>>> the Jupiter via Serial Port 2 (pin #15). So far, I have had no luck
>>> making
>>> it work. I'm wondering whether I need to "tell" the Jupiter that I have
>>> a
>>> DGPS unit attached, using the binary commands (which I have no clue how
>>> to
>>> do since I normally use the NMEA mode). Any help would be greatly
>>> appreciated.
>>
>> You should have this document in your hands anyway:
>> http://gpsd.berlios.de/vendor-docs/jupiter/MN002000A_JupiterReceiver_DesignerGuide_print.pdf
>>
>> Digital protocol, DGPS... well most things.
>>
>> Cheers,
>> Magnus
>>
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