[amsat-bb] CAMSAT Frequency chaos
Edson W. R. Pereira
ewpereira at gmail.com
Wed Aug 5 20:21:39 UTC 2015
Amateur satellites operating outside the allocated sub-bands is a very
unfortunate and bad precedent. Radio Amateurs from different countries and
different IARU regions spend years negotiating bandplans so that we can all
operate in harmony without causing interference to other amateurs.
The 2m band is indeed crowded, but we do have practically desert bands
above 70cm that so badly need activity. Not only the bands are available,
but we *need* to use them. Otherwise we will lose them.
73, Edson PY2SDR
- We humans have the capability to do amazing things if we work together.
- Nós seres humanos temos a capacidade de fazer coisas incríveis se
On Wed, Aug 5, 2015 at 2:32 PM, Paul Stoetzer <n8hm at arrl.net> wrote:
> Hit send before I could attach the last link, for the CAS-3
> coordination request.
> Paul, N8HM
> On Wed, Aug 5, 2015 at 1:32 PM, Paul Stoetzer <n8hm at arrl.net> wrote:
> > The CAMSAT filing you referenced is for the CAS-2 series not yet
> > scheduled for a launch, not the CAS-3 series on this launch.
> > LilacSat-2 has other frequencies coordinated:
> > http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=395
> > The CAS-3 series is pending coordination here:
> > On Wed, Aug 5, 2015 at 1:27 PM, Patrick STODDARD (WD9EWK/VA7EWK)
> > <amsat-bb at wd9ewk.net> wrote:
> >> David,
> >> I noticed the frequency selections for all of those satellites. It is
> >> that we may have 6 transponders that don't have overlapping frequencies,
> >> which could make for some interesting times ("Which of the 6 will you be
> >> on?" - for example). Seeing how some of those downlinks are at and below
> >> 145.800 MHz could cause many new issues with terrestrial and (for
> >> 145.800 MHz) other space operations. Also seeing APRS at 144.390 MHz
> >> (North American APRS frequency) and an FM uplink at 144.350 MHz on
> >> LilacSat-2 (CAS-3H) won't make some any happier.
> >> CAMSAT filed for IARU frequency coordination in 2012:
> >> http://www.amsatuk.me.uk/iaru/formal_detail.php?serialnum=264
> >> but it doesn't appear to have gone anywhere past the filing step. I did
> >> see frequencies listed on that web page, nor did I see the CAMSAT
> >> anywhere else on that site. I can only guess the Chinese licensing
> >> authorities are making full use of the 144-146 MHz range that is
> >> under the international (ITU) radio regulations for amateur satellite
> >> operation, regardless of the voluntary bandplans observed around the
> >> world.
> >> 73!
> >> Patrick WD9EWK/VA7EWK
> >> http://www.wd9ewk.net/
> >> Twitter: @WD9EWK
> >> On Wed, Aug 5, 2015 at 10:00 AM, David G0MRF via AMSAT-BB
> >> <amsat-bb at amsat.org> wrote:
> >>> Interesting.
> >>> Only a few days ago there was a comment that a satellite launched 15
> years ago was transmitting on 144.390 which was being used for weak signal
> meteor scatter in Europe. That was unintentional and in any case only sent
> a couple of very short beacons per minute.
> >>> Now we see another satellite 'licensed' very recently using exactly
> the same frequency and a lot of other satellites transmitting on
> frequencies allocated to repeaters and other services.
> >>> I presume the IARU were 'informed' of these frequencies rather than
> coordinating them.
> >>> I wonder if the head of licensing in Bejing is the same chap who
> thought the Anti satellite missile test, that produced thousands of pieces
> of space debris, was a good idea.
> >>> (rant over)
> >>> David
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