The Open Tracker in this balloon was set to switch to WIDE2-2 above 1000 meters altitude. The GPS failed, however, shortly after flight and so the Open Tracker never switched to the other path.<br><br>Stuff happens, ya know... :)
<br><br>73,<br>Robert KC8UCH<br><br><div><span class="gmail_quote">On 3/17/07, <b class="gmail_sendername">Robert Bruninga</b> <<a href="mailto:bruninga@usna.edu">bruninga@usna.edu</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
The recommendation for Balloons is to use the path of VIA<br>WIDE2-2.<br><br>This limits QRM yet provides good tracking on the ground:<br><br>1) At altitude it hits every digi IN RANGE ONCE.<br>2) The N-N dupe-elimination works perfectly. Minimum QRM.
<br>2) It does not bring up every home station (running WIDE1-1)<br>3) Yet the balloon goes 2 hops on the ground for finding it.<br><br>Using the path of WIDE1-1,WIDE2-2 is as *bad* as using the old<br>RELAY,WIDE was before! This is because it brings up every home
<br>digi over a dozen states plus all big digis causing significant<br>QRM.<br><br>The recommendation for Balloons is to use the path of VIA<br>WIDE2-2.<br><br>WIDE1-1 is not supposed to be used other than the first hop so
<br>that only one WIDE1-1 digi at most is ever involved in any<br>packet.. Using WIDE1-1 at altitude does not have this inherent<br>limiting of QRM to only one home digi and in fact has an<br>amplifying effect of maximum QRM from all fill-in digis.
<br><br><br>The recommended path for Balloons is WIDE2-2. This has been<br>worked out over the last 15 years of APRS experience as the best<br>for the balloon opeprator and the best for the APRS network and<br>all other users too. The probability of falling near a WIDE1-1
<br>digi is so small that the tiny benefit of using the W1-1,W2-2<br>path is not generally worth the significant increase in QRM over<br>a dozen states throughout the flight.<br><br>Bob, Wb4APR<br><br>-----Original Message-----
<br>Sent: Saturday, March 17, 2007 3:16 PM<br><br>> ... I'm trying to estimate the final landing spot of the<br>KC8UCH-11<br>> balloon...... I see from... FindU:<br>><br>> KC8UCH-11>APOT02,VE9GFI-2,WIDE1*,WIDE2-1,qAS,VE9APR:!3537....
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