Re: [amsat-bb] Echo totally unuesable on an Arrow

[Emily Clarke <w0eec@xxxxxxxxx>]

Hi Maggie,

At 04:46 PM 8/1/2004 -0400, Margaret Leber wrote:
>Emily Clarke wrote:
>
> > I made a contact on stock W32A with an AL-800
>>whip antenna when the satellite was at 60 degrees of elevation, and 
>>another using the Arrow at 15 degrees.  Aruni VE4WMK has also been making 
>>contacts using an Arrow and a W32A as well.
>
>Were these passes to the east (where the sat is exposed to more users) or 
>out over the Pacific? ARISS packet users noted long ago that as the 
>spacecraft moves out over the Atlantic (shrinking the footprint on land) 
>that collisions reduce and sucessful transmissions increase dramatically.

The time was 1849z on 31 July - 2/3rds of the continent were in the footprint.


>Aruni's contact with Egon happned on an az of 10 and el of <20, placing 
>the bird over the Arctic and away from QRM as well.

I'm not sure what your point would be?  If it was that all the QRM is 
coming from the South and East of the US that may be, but on the other hand 
at an elevation of under 20 degrees the path loss is enough to say that it 
is still a challenge.  But even with the satellite over the Arctic circle 
the major population areas of the US and Canada are all in the footprint.

>Do we see a pattern yet?

I don't think we can blame all the QRM on Texas and Florida, but we could 
certainly try (hihi - ducking)

73,

Emily



---------------------------------
W0EEC - CM87tm
AMSAT Area Coordinator - San Francisco Bay Area
http://www.projectoscar.net    http://www.PlanetEmily.com 
http://www.emilyshouse.com/experthams/ao7/

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