[aprssig] Roundthe-world approaching Cancouver Island now!

Paul Bramscher pfbram at comcast.net
Tue Jul 22 20:59:53 CDT 2014


Is there a mathematical or path-hop basis to the larger 577 circle?

I'm still checking the site I found today
(http://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-112.51,48.70,1821)
and it looks to me like my chance all hinges on how soon the balloon
swings east (assuming it does so).  If it goes too far north first, I
predict it'll be too wide an arc to the north and east for me.

If this were a winter launch, things would be more in my favor.  We here
in Minnesota frequently get alot of Canadian weather, the meteorologists
call it the so-called Alberta Clipper.  It would send the balloon right
to us.

(Riding the Clipper would be an excellent winter balloon project for an
amateur group in Canada.  But please send us hand-warmers and some
Unibroue, not -25 Fahrenheit...)  :-D

73,
Paul / KD0KZE

On 7/22/2014 7:21 PM, Lynn W. Deffenbaugh (Mr) wrote:
> From 41,600 feet, the radio footprint is about 251 miles in all
> directions (radius).  In the following screen shot, the balloon is at
> the center.  The smaller circle is the radio footprint (notice how all
> of the recent radio receptions are inside that circle?) and the larger
> circle is 577 miles in radius:
> 
> 
> 
> APRSISCE/32 will show you radio footprints for stations flying at
> altitude as will aprs.fi, IIRC.
> 
> Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
> 
> On 7/22/2014 7:48 PM, Paul Bramscher wrote:
>> I've not yet had the opportunity to track a balloon.  Anyone know what
>> to expect for the radio footprint on this one, or high altitude balloons
>> in general?
>>
>> On the http://spacenear.us/tracker/ site I'm curious about the blue
>> circles surrounding the various balloons.  Do these represent the footprint?
>>
>> 73
>> Paul, KD0KZE
>>
>> On 7/22/2014 11:58 AM, Robert Bruninga wrote:
>>> G6UIM reports a Balloon launched in the UK is approaching Washington
>>> state from across Asia and the Pacific right now.
>>>
>>> See:http://spacenear.us/tracker/ look for Balloon B-63
>>>
>>>  
>>>
>>> It is being well received by the APRS network in Canada, Washington and
>>> Oregon as it approaches Vancoover Island as shown here:
>>>
>>> http://aprs.org/balloons/M0XER-3.jpg
>>>
>>>  
>>>
>>> That image from Lynn, author of APRSIS32.
>>>
>>> Bob, Wb4APR
>>>
>>>  
>>>
>>>
>>>
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> 
> 
> 
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