[amsat-bb] Re: AMSAT UK P3E Lecture HEO vs GEO. and AMSAT-NA Priorities

[Sebastian]

Actually, XM has 2 functioning satellites, and 2 orbiting spares.

This makes the current active satellites as XM-3 "Rhythm" and XM-4  
"Blues" with two in-orbit spares: http://en.wikipedia.org/wiki/XM_Satellite_Radio

73 de W4AS
Sebastian

On Aug 12, 2008, at 6:25 AM, John B. Stephensen wrote:

> However, it takes 3 Molniya orbit satellites for Sirius to provide
> continuous coverage of the U.S. XM uses 1 geostationary satellite.
>
> 73,
>
> John
> KD6OZH
>
> ----- Original Message -----
> From: "Nigel Gunn G8IFF/W8IFF" <nigel at ngunn.net>
> To: <amsat-bb at amsat.org>
> Sent: Tuesday, August 12, 2008 03:24 UTC
> Subject: [amsat-bb] Re: AMSAT UK P3E Lecture HEO vs GEO. and AMSAT-NA
> Priorities
>
>
>> Works OK for the US Sirius radio network with a period of approx 24  
>> hours.
>>
>> John B. Stephensen wrote:
>> Molniya orbits aren't very useful to outside funders