[time-nuts] frying pan antenna

[mike cook]

Yes Bruce, I also think that azimuth dependent masking would be useful.

I have been suffering from strong reflections from facing buildings at 
50m to 100m, which cause sharp departures from the average PPS TI 
(HPZ3801A/ Z38XX app.) values. I can remove the problem by carefully 
watching the satellite azimuth/elevation display  and  sending the 
receiver a command to ignore the relevent SV when it passes  to the 
south (antenna on north facing window ledge). I think that it would be 
feasible in somethig like Z83XX and LH  to set up an azimuth dependent 
mask and monitor the SVs predicted positions to selectively 
ignore/include them when they pass out of and into line of site.

I did post in december on this problem but add here a TI stats view to 
show the magnitude of the errors seen.

Mike

Le 16/03/2010 03:30, Bruce Griffiths a écrit :
>
> A pity that the GPS receiver elevation mask can't generally be made to 
> be azimuth dependent.
> You could then have a higher elevation limit in the direction of those 
> trees.
>
> However, it is possible in principle with an M12+T, M12M T or similar 
> timing receiver which provides the relative timing contribution of 
> each SV to the solution, to back out the contribution of a given SV 
> and compute the corresponding timing correction for software 
> correction of the PPS pulse timing.
>
> Bruce
>
> Mike Naruta AA8K wrote:
>>
>> My aluminum frying pan ground plane does a nice job.
>>
>> The nut welded on for the handle is a convenient
>> place to attach the lightning ground wire.
>>
>> Snow accumulation hasn't been a problem yet.
>>
>> The non-stick underside seems to discourage insects.
>>
>> You should have seen the look on my wife's face when
>> I told her that I would like to bolt a frying pan
>> on the peak of the roof.
>>
>>
>> Mike - AA8K
>>
>>
>> WarrenS wrote:
>>>> Next on my list of things to try is a smaller open taco maker deep 
>>>> dish metal pan.
>>>
>>
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20091201-3.PNG
Type: image/png
Size: 47510 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20100316/bf1afb1c/attachment.png>