[time-nuts] HP 117/10509a...

[Bob Camp]

Hi

And possibly if the bpsk does something useful, you can identify a carrier phase slip and correct for it….

Bob

On Jul 5, 2012, at 7:19 PM, J. Forster wrote:

> If propagation goes south, you loose track of the carrier phase, the basis
> of the system. If your local standard is stable and close to right, that's
> not a big deal. If not, you can easily go down the garden path.
> 
> -John
> 
> ===============
> 
> 
>> Hi
>> 
>> Propagation isn't going to change with modulation format, so that part
>> will still be with us. I'm wondering if some fancy processing on the new
>> code might have some advantages. It's not worth digging into until they
>> have a final format though.
>> 
>> Bob
>> 
>> On Jul 5, 2012, at 6:19 PM, J. Forster wrote:
>> 
>>> From what I've read, the mods are to improve the Time of Day, not the
>>> Time
>>> Interval accuracy.
>>> 
>>> In my location (MA) WWVB was never as good as LORAN-C because of
>>> propagation issues.
>>> 
>>> -John
>>> 
>>> ===============
>>> 
>>> 
>>>> Hi
>>>> 
>>>> The real question is weather the BPSK will help us get significantly
>>>> better accuracy out of WWVB or not. If it does, time marches on. If not
>>>> -
>>>> total waste of effort.
>>>> 
>>>> DSP based low frequency receivers are pretty easy to make. You still
>>>> will
>>>> need those antennas and preamps to make them work though. If I can get
>>>> Loran-C type accuracy out of WWVB with the new modulation, I'll
>>>> certainly
>>>> build or buy a receiver.
>>>> 
>>>> Bob
>>> 
>>> 
>>> 
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>> 
>> 
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>> 
> 
> 
> 
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