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Re: AO-40: transponder off!!



Thanks Jerry - Squint does work Nova!
73's
Bob - WB9CNS

----- Original Message -----
From: "Jerry Pixton" <jpixton@shentel.net>
To: "Gene Harlan" <atvq@hampubs.com>; "Alan K. Adamson" <ne1h@highrf.com>;
"Margaret Leber" <maggie@voicenet.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Thursday, May 31, 2001 6:12 AM
Subject: RE: [amsat-bb] AO-40: transponder off!!


> Gene,
>
> There are two steps.
>
> 1. Select Setup-Satellites-AO40 and enter current Alat and Alon
> 2. Click on the Schedule tab and select AO-40 High Gain antenna, close
> these windows
> 3  Now Right click on main map, select Configure View, select your
> satellite view, then click
> on Format Text and select what you want to see in the parameters box.
>
> This gives you real time display of squint
>
> If you want a prediction -
>
> 1. Select Utilities-Listing-One Observer-Setup and set parameters you
want,
> eg max squint
> 2. Click on ReCalc and print
>
> Jerry, W6IHG
>
>
> At 10:59 PM 5/30/01 -0500, Gene Harlan wrote:
> >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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> >
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> ------------------------------------------
> Dr. Jerry R. Pixton, PIXOS Designs LLC
> http://www.pixos.com/designs/
> jpixton@shentel.net
> ------------------------------------------
>
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