[amsat-bb] Re: AMSAT Operating Areas (OA's)
kl7uw at acsalaska.net
Tue Jan 29 23:42:45 PST 2008
What you describe is what we see in Alaska for 70-90% of a Leo
pass. Often I have had 15-min. exclusive use of a Leo as it comes
over the N. Pole and descends over Alaska. The end of this the
footprint overlaps the Pacific NW and qualifies as OA/B.
I am not active on Leo for some time. My antennas are down awaiting
installation on a new short tower. Winter has precluded getting much
outside work done. Short daylight hours also interfere.
Ed - KL7UW
At 11:28 AM 1/29/2008, Tony Langdon wrote:
>At 06:18 AM 1/30/2008, Robert Bruninga wrote:
> >The GLOBAL map of HAM radio activity is extremely diverse, with
> >probably 95% of the HAM Radio population all sharing only 5% of
> >the footprints of our satelites. Trying to make "rules" without
> >accounting for this 400-to-1 diversity severly limits the
> >utility of our satellites.
>This is certainly a good point. I'm sure few, if any in the US or
>Europe have experienced what I have on many occasions - an FM bird to
>themselves, and I'm also sure they've never had a ragchew on such a
>satellite. Again, something you can do here, provided overs are kept
>short (30 sec or less), and decent breaks are left between them for
>others to break in and use the bird. When I was active, it was an
>unspoken rule that breaking stations had priority, and any ragchew in
>progress would stop, until either the breaking station joined the
>ragchew, or all other activity on the bird had ceased. I certainly
>don't recall issues with anyone hogging the satellites.
>This sort of operation might sound strange to the more congested
>areas, but it did help newcomers, who hadn't trained themselves to
>recognise the subtle change in the background noise, to find the
>downlink - hearing voices is a dead giveaway! :D And of course,
>frequent invitations for stations to break in were given on air.
> >I propose that AMSAT endorse a global AMSAT map of "Operational
> >Areas". There are 4 categories:
> >OA/0 - Isolated. Hawaii, Arctic, Antarctic, South Africa etc
>Yep, anything east of New Zealand would certainly qualify here too.
> >OA/A - Area, Regional. (Australia, NZ, Japan? Etc)
> >OA/B - Border (10% footprint overlap into OA/C areas
> >OA/C - Congested. USA, Europe
> >Then if we ever need to make any flat statements about
> >operations, then it can very clearly be designated as to what
> >operating recommendations apply where.
> >Anyone want to take a crack at drawing the map?
>I think this should be done as a collaborative project, since each of
>us has some idea of local satellite activity. I can certainly
>forward yor idea to the active local operators down here for comment,
>if yo like.
> >This same map can also overlay the "INTERFERENCE" areas which
> >shows the footprint areas of HIGH QRM from pirates. These
> >shaded areas would also help educate not only our users, but our
> >regulatory bodies as well.
>Again, agreed. :) Also the satellite designers, if the band
>affected is shown.
>73 de VK3JED
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Ed - KL7UW
BP40IQ 50-MHz - 10-GHz www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
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