[time-nuts] GPS to H-Maser comparison

Magnus Danielson magnus at rubidium.dyndns.org
Sun Oct 6 08:09:36 EDT 2013


Hi Jim,

It seems likely. How was your orientation to the sun when it hit?

See if you can find any other with similar orientation to the north,
east and west of you.

What does all the ionospheric observations points in the international
network say? There is a lot of observations points which should help to
depict if it where the ionosphere that cause the issue. Recall that the
first degree prediction is being done to single-frequency C/A civilian
receivers, as they fail to make their own observations (there is one
method to do it for such a receiver, by monitoring code and phase
separetly). The grid of observations use double frequency receivers, and
both GPS/GLONASS is becoming more common, to increase the observability.
Anyway, you might have seen the difference between apparent and
predicted delay as ionosphere lit up extra in your region. If this was
the case, others should have observed it.

Cheers,
Magnus

On 10/06/2013 01:58 PM, Jim Palfreyman wrote:
> Maybe Australia was mainly hit by the CME?
>
> On Sunday, 6 October 2013, Said Jackson wrote:
>
>> Zero effect visible on the CSAC GPSDO real time plots from our lab:
>>
>> http://www.jackson-labs.com/images/gpsstat.htm
>>
>> Sent From iPhone
>>
>> On Oct 3, 2013, at 20:56, Jim Palfreyman <jim77742 at gmail.com<javascript:;>>
>> wrote:
>>
>>> Hi all,
>>>
>>> If you go to this page: http://users.on.net/~cdadsl/ you will see some
>>> graphs (all in UT). Notice the larger than usual bump on Oct 02 around
>> 0600
>>> ish. The names are locations all over Australia.
>>>
>>> Jim Palfreyman
>>>
>>>
>>> On Friday, 4 October 2013, Brian Inglis wrote:
>>>
>>>> On 2013-10-03 05:33, Jim Palfreyman wrote:
>>>>
>>>>> Noticed an above average bump in our H-Maser vs GPS graphs - from sites
>>>>> all
>>>>> over Australia.
>>>>>
>>>>> Recent coronal mass ejection or US government shutdown not updating
>> GPS?
>>>>> Anyone else seen it?
>>>>>
>>>> drop out gap between about 04.21-04.26 UTC?
>>>> clockstats.20131003:
>>>> 56568 15684.876 127.127.20.4 $GPRMC 042124 A ...
>>>> 56568 16004.862 127.127.20.4 $GPRMC 042644 A ...
>>>> peerstats.20131003:
>>>> 56568 15684.876 127.127.20.4 961a -0.000002270 ... 0.000005344
>>>> 56568 16004.862 127.127.20.4 961a -0.000013150 ... 0.000015721
>>>> loopstats.20131003:
>>>> 56568 15684.876 -0.000002270 0.899 0.000007071 0.000070 4
>>>> 56568 16004.862 -0.000013150 0.898 0.000008830 0.000114 4
>>>>
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