[amsat-bb] CAMSAT Frequency chaos
n8hm at arrl.net
Wed Aug 5 17:32:45 UTC 2015
Hit send before I could attach the last link, for the CAS-3
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:
> 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:
>> 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:
>> 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
>> Patrick WD9EWK/VA7EWK
>> Twitter: @WD9EWK
>> On Wed, Aug 5, 2015 at 10:00 AM, David G0MRF via AMSAT-BB
>> <amsat-bb at amsat.org> wrote:
>>> 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)
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