[HamWAN PSDR] Location of Haystack

[Tom Hayward]

Actually, the model looks good to me:
[image: Inline image 2]
This is with Radio Mobile. The link is only 17.57km, so I'm not sure why
you get a reported obstruction at 19.41km. One of us must be punching the
coordinates in wrong.

On Google Earth the trees look pretty tall. Trees are pretty good
attenuators at 5.9 GHz, so you'll need clear line of sight for it to work.

Tom

On Sun, Aug 20, 2017 at 12:38 PM, W7ABD <w7abd1 at gmail.com> wrote:

> Hi Tom,
>
> I used the Scadacore RF Line of Sight path modeling
> (http://www.scadacore.com/field-tools/rf-path/rf-line-of-sight/)
> This app has to be run on device that has google earth app installed, like
> an iPad.
>
> Using these parameters:
>
> Haystack    Lat:     47.808024
>             Lot:    -121.727227
>             Height:  3 m
>
> My QTH      Lat:     47.722862
>             Lot:    -121.925666
>             Height:  10 m
>
>
>
> From the looks of the plot, I have obstructed line of sight at 19.41 km.
> So unlikely Haystack will work.  Will check out the other sites...
>
> Jim
> W7ABD
>
>
>
> On 08/19/17 14:04, Tom Hayward wrote:
>
> The antennas are about ten feet above ground. They're mounted to the
> building, no tower.
>
> Tom KD7LXL
>
> On Aug 19, 2017 1:12 PM, "W7ABD" <w7abd1 at gmail.com> wrote:
>
>> Thanks for the info Tom!
>>
>> I completely missed the lat/lot at the top of the pictures page...
>>
>> Do you know the MSL (height of the haystack antenna).  Seems I have
>> missed that too...
>>
>> Will be happy to share my method for path modeling once I get it up and
>> running...
>>
>> Thanks!
>>
>> Jim
>> W7ABD
>> w7abd1 at gmail.com
>>
>>
>> On 08/19/17 08:15, Tom Hayward wrote:
>>
>> You can find the location published here:
>> https://hamwan.org/Puget%20Sound%20Data%20Ring/Sites/Haystack.html
>>
>> The antenna pattern is here:
>> https://hamwan.org/Labs/Antenna%20Analysis/Ubiquiti%205G-19-120.html
>>
>> Haystack has two of these, aimed at 0 and 240 degrees.
>>
>> There is 500mw of transmit power at the antennas. The receiver threshold
>> is about -90dBm, but -70 is required for full speed.
>>
>> I'm always curious to hear about path modeling, if you want to share your
>> methodology.
>>
>> Tom KD7LXL
>>
>> On Aug 19, 2017 8:05 AM, "W7ABD" <w7abd1 at gmail.com> wrote:
>>
>>> I considering joining HAMWAN, but before I invest in the equipment want
>>> to make sure I will have good signal and bandwidth at my home QTH.
>>>
>>> Can someone please send me the exact location (lat, lon) of Haystack, so
>>> I can do a line-of-sight study.
>>>
>>> Thanks!
>>>
>>> Jim
>>> W7ABD
>>> w7and1 at gmail.com
>>>
>>>
>>> _______________________________________________
>>> PSDR mailing list
>>> PSDR at hamwan.org
>>> http://mail.hamwan.net/mailman/listinfo/psdr
>>>
>>>
>>
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>
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