[amsat-bb] Re: HO-68 Tracking

Erich Eichmann erich.eichmann at t-online.de
Tue Jan 26 01:18:54 PST 2010

what is your location (locator, longitude, latitude), what are your entries 
for HO-68 in Doppler.SQF  and what were the predicted AOS and LOS times for 
the pass you mean?

You can check that with the Preview function or the list programs WinAOS or

I never heard that the predictions of NOVA and SatPC32 were different,
provided the data are the same for both programs.

73s, Erich, DK1TB

----- Original Message ----- 
From: "Peter Scheller" <nh6vb at msn.com>
To: "amsat-bb" <amsat-bb at amsat.org>
Sent: Tuesday, January 26, 2010 3:55 AM
Subject: [amsat-bb] HO-68 Tracking

> Greetings to all.
> I have 2 satellite prediction programs, NOVA for Windows and of course
> SatPC32. Since the two
> do not match in prediction, I tried to find out which one is correct.
> Anyone wonders about the outcome?
> Erich, you can relax, your SatPC32 program is superior! But......  Setup:
> IC-706MKII, outside Arrow antenna
> mounted on photo tripod at ground level. Computer time adjusted to WWV and
> newest Keps loaded via internet. HO-68 orbit 547 was an almost overhead
> pass (here in Hawaii). When I finally picked up HO-68's
> beacon, the indicated CAT frequency of the SatPC32 program and the
> MANUALLY tuned frequency of the
> IC-706MKII did not match, and were far off. By observation, the satellite
> was lagging the prediction program.
> When the the CAT window showed a beacon frequency of 435790 KHz I timed
> this with a stop watch, and
> waited till the radio dial showed the same. The difference was about 7
> minutes! and SatPC32 showed HO-68
> almost out of the foot print whilst it should have been overhead at the
> closest distance to me. Something
> is absolutely wrong. A 7 minute time difference is not acceptable. Next I
> loaded HO-68's Online Satellite
> Pass Predictions from AMSAT NA. Surprise, the AMSAT predictions accurately
> mirror the SatPC32 predictions,
> or vice versa. But are wrong! as measured by the actual event. Any help
> out there?
> 73, Peter NH6VB
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