[amsat-bb] Re: Arissat-1 Commanding?

W4ART Arthur Feller afeller at ieee.org
Fri Aug 5 16:05:17 PDT 2011

The radio regulations govern here.  Both the USA and Russian administrations are signatory parties, along with about all others around the world.

The pertinent provision is:

RR 22.1  Space stations shall be fitted with devices to ensure immediate cessation of
their radio emissions by telecommand, whenever such cessation is required under the provisions
of these Regulations.

This applies to all space stations in all radio communication services.

More information on this topic is at Controlling Satellites on the IARU web site.

Responsibility for the space station lies with the authorizing administration.

I hope this helps.

73, art…..
W4ART  Arlington VA

On 5-Aug-2011, at 06:40 PM, Phil Karn wrote:

> On 8/5/11 11:03 AM, Burns Fisher wrote:
>> I saw on one of the NASA announcements that the snarffled 70cm antenna would
>> mean no commanding of the bird.  (This was probably before it was realized
>> that that receive actually seems to work).  But the question I have is
>> whether there IS some commanding of the bird possible. I guess you have to
>> be able to turn it off to satisfy the FCC (true?) but can other things be
>> done?  I assume/home that the command channel is encrypted, so disclosing
>> its existance is not compromising the bird.
> The satellite is operating under a Russian license, so I assume the FCC
> would have no jurisdiction over it.
> In any event, the fact that the transponder seems to work well indicates
> that the spacecraft should have no trouble hearing commands.
> Phil
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