[amsat-bb] Fw: HF-HF satellite (OSCAR LOCATOR?)
Ángel Peláez Martínez
angelkilroy at yahoo.es
Fri May 27 14:38:12 UTC 2016
Rather than vertical, I see a very steep orbit, near to 90deg. It resembles a straight line, but it is a curved one indeed, with time increment calibration after EQX.
I hope my explanation be useful.
Enviado desde mi iPhone
El 27/5/2016, a las 16:09, Robert Bruninga <bruninga at usna.edu> escribió:
>> Sat tracking in the early days was with an AMSAT
>> OSCAR-LOCATOR (Rotating mylar discs over a global map!!).
> I just googled and there is only one image of an OSCARLOCATOR I can find.
> I remember it well, but am confused by this image:
> I understand the curved trace. It crosses near the pole at the latitude of
> the inclination of the orbit. And I understand the circular plot which is
> angle and elevation from your QTH when placed over your house. But I do
> not understand the straight line scale going nearly vertical and labeled
> RS? WHy is there no curve to it?
> And the only other one I found was this:
> Which looks like it has the orbits of three different satellites, one of
> them added on in green marker. But this one is lacking the AZ/EL circle
> for the station.
> Is there a better image anywhere that I can use to justify this "minimum
> satcom" experiment?
> And is this how it worked? You got the daily zero crossing of the
> equator. Then for the next 24 hours you could just rotate the plastic
> overlay by the longitude increment? ANd increment the time by the orbital
> On a trip and without a smart phone, I'd rather do an OSCAR locator then
> fuss with a PC...
> Bob, WB4APR
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