Re: What are the Proposed Radio Frequencies for the Broken Hill? What are the Satellite Frequencies?

["Robert Parnell" <rparnell@netspace.net.au>]

> The frequencies used for Mobilesat are as follows.
> Uplink ie from Train to Satellite 1646.5 Mhz to 1660.5 Mhz
> Downlink from Satellite to Train 1545.0 Mhz to 1559.0 Mhz
>
> For those of you who are superbly keen and want to listen to the satellite
> uplink the frequencies are
>
> Earth Station to Satellite 14011.5 Mhz to 14025.5 Mhz
> Satellite to Earth Station 12263.5 Mhz to 12277.5 Mhz.
>
> Does the SRA have their own Earth Station ??

SRA have nothing to do with it now, it is all RAC's equipment.
They don't have their own Earth Station.


>
> There is no switching in the satellite so all calls have to go via 2 hops
, ie
> train - satellite - earth station - train control.
> Reverse is
> Train Control - Earth Station - satellite  - Train.

When testing through satellite, there is a delay of no more than 2 seconds
from the time you speak to the  time your voice is received at the other
end.(When testing from a train controller to a vehicle fitted out with all
the loco equipment parked about 3m away, so you can hear yourself and vice
versa)  It makes a conversation slightly longer, but that is the only
drawback.