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Re: AO-40: transponder off!!



Nova has a problem with Squint - Mine does not work either
and I'm using the lastest version

Bob - WB9CNS

----- Original Message -----
From: "Gene Harlan" <atvq@hampubs.com>
To: "Alan K. Adamson" <ne1h@highrf.com>; "Margaret Leber"
<maggie@voicenet.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Wednesday, May 30, 2001 10:59 PM
Subject: RE: [amsat-bb] AO-40: transponder off!!


> In my Nova program, the squint is always 0 (zero). Am I not filling in
> something, or turning something on that I should? A have input the data
for
> ALAT/ALON.
>
> Thanks.
>
> Gene Harlan - WB9MMM
> Harlan Technologies - publishers of:
> Amateur Television Quarterly
> ATVQ@hampubs.com
> OSCAR Satellite Report
> OSR@hampubs.com
> http://www.hampubs.com
>
> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of Alan K. Adamson
> Sent: Wednesday, May 30, 2001 7:33 PM
> To: Margaret Leber
> Cc: amsat-bb@AMSAT.Org
> Subject: RE: [amsat-bb] AO-40: transponder off!!
>
>
> I'll offer the following.
>
> The squint angle calc in SatTrack is *way* off compared to something that
> has a real geometry model for deep space satellites.  If you notice,
> SatTrack uses the TLE mode for deep space objects (ao-40 counts as one).
It
> will only use the LEO model for the LEO sats.
>
> Because of this, there is an error of up to 20 degrees that I've seen
> between SatTrack and Nova with the exact same alon/alat settings.
>
> Alan
>
> -----Original Message-----
> From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> Behalf Of Margaret Leber
> Sent: Wednesday, May 30, 2001 7:10 PM
> To: Douglas Braun & Nadia Papakonstantinou
> Cc: amsat-bb@AMSAT.Org
> Subject: Re: [amsat-bb] AO-40: transponder off!!
>
>
> Douglas Braun & Nadia Papakonstantinou wrote:
>
> > My version of SatTrack predicts squints as low as 22 degrees
> > for this attitude.  Did I mess up my fix for AO-40 vs. AO-13
> > attitude calculations?
>
> On my SatTrack I've simply entered the attitude as given into the
> software and assumed that the closer the squint is to 180 the more
> favorable it is.
>
> Right now I'm tracking the bird 13 degrees below my horizon at about az
> 80 degrees; the squint is reading as 157 degrees at MA 43, which I
> interpret as an effective squint angle of (180-157)=23 degrees at my
> location FN20hd=75W 40N.
>
> Most of DE is north of 50N, of course.
>
> 73 de Maggie K3XS
>
> --
> -----/___.   _)   Margaret Stephanie Leber    / "The art of progress  /
> ----/(, /|  /| http://voicenet.com/~maggie   / consists of preserving/
> ---/   / | / |  _   _   _    `  _AOPA 925383/ order amid change and /
> --/ ) /  |/  |_(_(_(_/_(_/__(__(/_  FN20hd / change amid order."   /
> -/ (_/   '  K3XS  .-/ .-/    ARRL 39280   /___ --A.N.Whitehead ___/
> /____ICQ 7161096_(_/_(_/__AMSAT 32844____/ <maggie@voicenet.com>
>
>
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