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

[J. Forster]

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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