[amsat-bb] Re: Hawaii BL11 on AO51 today?
n3tl at bellsouth.net
Tue Jun 2 09:37:10 PDT 2009
Off the BB, I emailed Patrick and asked for a more accurate time of his contact with Bill. He replied that it occurred sometime during the 02:33 UTC minute of the pass last night, but he didn't have the exact second. Using Orbitron's simulation mode, the following represents the CLOSEST that AO-51 was to these two stations during their contact. These ranges to AO-51 represent a time of 02:33:59 UTC.
According to Orbitron, the range from Robert to the satellite was 3,169.827 km (1,969.639 miles), and from Patrick to the satellite was 2,073.436 km (1,288.373 miles). So, the LOWEST total distance covered during their contact was 5,243.263 km (3,258.012 miles). That's very impressive, guys.
73 to all,
Tim - N3TL
-------------- Original message from n3tl at bellsouth.net: --------------
> Hey Patrick,
> You've sold yourself and Robert a few hundred miles short with that estimate of 2,900 miles. That, of course, is the "shortest distance between Point A and
> Point B" straight-line distance. But each of you had to make it up to AO-51.
> At the risk of initiating a major debate here, I believe your QSO actually
> covered more than 3,240 miles - at the minimum.
> As you did, I used BL11cg and, in Orbitron, tracked the range to AO-51 from that grid square during the 02:31 UTC pass last night. The CLOSEST that AO-51 was to BL11cg during that pass (again, according to Orbitron) was at 02:34:21, when the range to the satellite from there was 3,166.273 km (1,967.431 miles). At that same point in the pass, the range to AO-51 from your location (I used the exact
> coordinates you provided in this email) was 2,053.028 km (1275.692 miles).
> To log a successful QSO, then, the two of you actually covered a total distance of 5,219.301 km, or 3,243.123 miles. And again, that is the best-case scenario
> as it applies to Robert's location. Those numbers are based on Orbitron's
> calculation of the exact second during the pass when AO-51 was closest to
> Congratulations to you both - again. That is outstanding!
> 73 to all,
> Tim - N3TL
> -------------- Original message from "Patrick STODDARD (WD9EWK/VA7EWK)"
> : --------------
> > Hi!
> > > Robert - you sounded great here in DM13-land (Riverside, CA).
> > > Patrick is further east than I am ... how far did you
> > > communniate???
> > I don't know exactly where Robert was in Honolulu. I was
> > in my favorite Phoenix city park on the DM33xp/DM43ap
> > grid boundary - 33 degrees 38.903 minutes North, 112
> > degrees West exactly - where I operate from whenever I
> > say I am in DM33 and DM43:
> > ll=33.811102,-112.000122&spn=2.040058,3.872681&t=h&z=8&iwloc=addr&om=0
> > I held my antenna as high as I could hold it and pointed
> > it westward, since there is a freeway wall not far from
> > that spot. I had a maximum of 15 degrees elevation for
> > the pass, and Robert mentioned in an e-mail earlier this
> > afternoon he was only going to have a maximum of 4
> > degrees elevation on that pass. He was most likely
> > working hard for every bit of the satellite he could hear.
> > Thanks for picking me up, Robert!
> > Based on estimates for Honolulu (grid BL11cg) and using
> > my location as mapped in the link above, it appears we
> > covered a path of just over 2900 miles (almost 4700km)
> > with that brief contact. My only other satellite QSO with
> > the Hawaiian islands was with WH6FC on the "big island"
> > of Hawaii (grid BK29) back in December 2005. That QSO
> > spanned about 2850 miles/4500km from Phoenix, and
> > Honolulu will be further away from me than anywhere on
> > the island of Hawaii.
> > 73!
> > Patrick WD9EWK/VA7EWK
> > http://www.wd9ewk.net/
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