[time-nuts] New WWVB modulation format receivers (NOT)

Brooke Clarke brooke at pacific.net
Fri Feb 21 19:36:26 EST 2014


Hi  Paul:

The problem with GPS is you don't get the DST bits.
For the OP that's OK, but if you want local time it isn't.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

paul swed wrote:
> Boy do I need to agree with Chris's comments above. If this is anything
> serious GPS really is the answer in all respects. Yes there is the risk of
> something happening. But amazingly a lot of the GPS receivers hold onto
> time pretty well even without GPS.
> The whole WWVB thing makes sense as a frequency transfer method. But is not
> at all close to GPS today. Its far more interesting to watch the VLF
> propagation behaviors and as a sort of backup frequency reference. LORAN C
> simply kicked butt with what it delivered and was on par with and frankly
> better then GPS for frequency. At least for me over 20 years of practice.
> But one day soon eLORAN may just come back its looking positive.
> Sorry not to change the subject.
> Regards
> Paul.
>
>
> On Fri, Feb 21, 2014 at 11:46 AM, Chris Albertson <albertson.chris at gmail.com
>> wrote:
>> Bob,
>>
>> If you are looking for an accurate, easy to use timing signal then GPS
>> is the one you want.   WWV and WWVB are what I call "legacy" signals
>> and while they might be accurate when broadcast there is propagation
>> delay and unknown atmospheric and ionospheric conditions.
>>
>> But the question is "How accurate do you need?"  If a few tens of
>> milliseconds is good enough then running NTP over the internet will
>> work and if you already have an internet connection it's free.  If you
>> need a few nanoseconds then GPS is what you want.
>>
>> Using your beat with WWV as a benchmark.  You were getting about one
>> part in a million accuracy.  It is VERY easy to do 10,000 times better
>> than that with GPS.
>>
>> On Thu, Feb 20, 2014 at 8:19 PM, Bob Albert <bob91343 at yahoo.com> wrote:
>>
>>> I would love to discipline my counter and signal generator time bases to
>> match NIST.  Is this possible, and what would I need to do?
>>> I am sure this subject has been covered but I don't know how to find it.
>> --
>>
>> Chris Albertson
>> Redondo Beach, California
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