[amsat-bb] Re: Rokot launch today with RS series sat?

Andrew Glasbrenner glasbrenner at mindspring.com
Wed Jul 4 10:13:41 PDT 2012


I guess it is too much to hope for a transponder on any of the Russian satellites these days. Such a shame as it is a great orbit.

73, Drew KO4MA

Sent from my iPhone

On Jul 4, 2012, at 12:35 PM, "Trevor ." <m5aka at yahoo.co.uk> wrote:

> --- On Wed, 4/7/12, Lizeth Norman <normanlizeth at gmail.com> wrote:
>> 2.4 is specified as a radiolink freq. The cam is described as a webcam. > Says something about an ISS mission specialist.
>> Wonder if it is a real live 2.4 wifi device? Probably not something the
>> average Joe or Jane could receive from home. 
> 
> I think the ISS reference is to the spacecraft manufacturing company of that name http://www.iss-reshetnev.com/ rather than the space station. 
> 
> I would imagine to stream lo-res video they'd ideally need a data rate of around 115 kbps, WiFi would be over-kill for that. It could be achieved with a signal occupying about a 100-150 kHz bandwidth which could be done on either 435 MHz or 2400 MHz.
> 
> The document says command uplink in the Primary 145 MHz band with downlink at 435 MHz but the reference to radiolink for 2400 MHz baffles me - link to what ? 
> 
> I've not had a chance to look any further other that finding document, there may well be other papers on the satellite written by students/professors somewhere on the web.
> 
> Basically I've no idea, I guess we might find out on the 13th.
> 
> 73 Trevor M5AKA
> 
> 
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