[amsat-bb] CAMSAT Frequency chaos

Paul Stoetzer n8hm at arrl.net
Wed Aug 5 17:32:11 UTC 2015


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 nice
> 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 not
> see frequencies listed on that web page, nor did I see the CAMSAT satellites
> 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 permitted
> 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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