[amsat-bb] Re: Galileo interference on L band

John B. Stephensen kd6ozh at comcast.net
Thu Sep 21 00:26:15 PDT 2006

The first HEO U/V linear transponder flew in 1983 and everyone wants 
compatibility for the next satellite -- effectively until 2018. A digital 
transponder will have the same issues. If the first one flies in 2010, users 
will want compatibility until 2045.



----- Original Message ----- 
From: <sco at sco-inc.com>
To: "amsat bb" <amsat-bb at amsat.org>
Sent: Thursday, September 21, 2006 04:54 UTC
Subject: [amsat-bb] Re: Galileo interference on L band

> Right on. Every airplane flying passengers will still have our GPS
> system on board. The european gps if it ever is built will broadcast
> on three (3) channels so even if one was degraded a little bit it
> wouldn't matter much. They will need to keep our system if they ever
> want to be able to fly passengers into US or NATO controlled
> airspace. It will be at least 10-15 years before such a system could
> be in place and certified by the airlines. By then Eagle would be at
> the end of its life anyway.
> If we just give up whole freq bands because we are scared of the big
> bad europeans who are drowning in socialist social program debt, then
> we deserve to lose our bands if we give up without a fight. If a
> country tries to take away our bad because of this "bad science" then
> we should fight them in court and in the public relations area. I say
> figure out a way to use and justify our L band in WWIII that we find
> ourselves in now. Are we not now recognized at least in this country
> as the last line of communications in case of attack? Plan for a way
> to use Eagle when the next attack or hurricane comes our way.
> If L band makes sense from a technical point of view then build and
> deploy it. let the political battles come and be fought if they must
> after that.
> Les W4SCO
> At 11:08 PM 9/20/2006, George Henry wrote:
>>Gosh!  How did we ever fly airplanes without crashing them, before 
>>Show me a commercial pilot who would rely solely on his GPS for 
>>and I'll show you a pilot who doesn't belong in the cockpit!
>>----- Original Message -----
>>From: "Michael R. Owen" <nlsa at nlsa.com>
>>To: <amsat-bb at amsat.org>
>>Sent: Wednesday, September 20, 2006 4:51 PM
>>Subject: [amsat-bb] Re: Galileo interference on L band
>> > Friends,
>> >
>> >
>> > Having said this, AMSAT planners should know that any amateur
>> > interference or intrusion into the GPS & Galileo "band" would be
>> > supremely foolish.  All the arguments about how ham radio is great in
>> > emergencies will count for nothing the first time an aircraft crashes
>> > after losing its satellite navigation due to interference.  I have been
>> > a ham for 35+ years and love the hobby dearly, but we must keep in mind
>> > that in the Big Picture, we are not very important.  The FCC and its
>> > European counterparts will yank our 13cm ("L" band) allocation in a
>> > heartbeat if we interfere with GPS/Galileo.
>> >
>> > 73,
>> > W9IP
>> >
>> > --
>> > Michael R. Owen, W9IP
>> >
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> _______________________________________________
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