[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]
Re: AO-51 or ECHO downlink power
- Subject: Re: [amsat-bb] AO-51 or ECHO downlink power
- From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxxxxxx>
- Date: Thu, 20 Jul 2006 21:15:33 -0400
- DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=mindspring.com; b=P09F+Q+TX9jLLjk7GxyYJ5wDIaPAa0OtENYBq1HLKaE/ntkFAUGx0KN2OT1xJU1g; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP;
Gentlemen,
I am working on assembling some comprehensive answers to these questions.
Give me a few days and I'll get it together in one email to the -bb.
73, Drew KO4MA
AMSAT LM 2332
AO-51 Operations Committee
----- Original Message -----
From: "Robert Bruninga" <bruninga@usna.edu>
To: <amsat-bb@amsat.org>; <tmcgrane@suffolk.lib.ny.us>
Sent: Thursday, July 20, 2006 2:37 PM
Subject: Re: [amsat-bb] AO-51 or ECHO downlink power
>>>> McGrane <tmcgrane@suffolk.lib.ny.us> 07/20/06 12:24 PM >>>
>>I have a few points regarding the low power downlink of ECHO.......
>>A year and a half ago, I proposed...changeing the satellite
>>control to allow excess solar power, beyong battery charging,
>>to be directed to the transmitters for higher power daylight operation.
>
> I wonder also if the transmitters are on all the time including the 90% of
> the time they are not over the 10% of the earth with Ham radio
> operators? I don't know, because when I listen (in the usa) of course
> they are always on. I dont know what they do the other 95% of the
> time. Since there is PL on the uplink, it would seem possible to
> have that start a 1 minute time out timer that would key up the TX
> while in view of users, and then time out 1 minute after last user?
>
> This would allow a 10dB increase in TX power with no impact on
> average power budget.
>
>>I believe one of the intents of echo was to introduce new users to
>>satellites and amsat.
>
> Being 10 dB stronger when in view, and Off when no one is in the
> footprint would make it a lot more visible to modest users.
> Again, I could be fully wrong and maybe it does only come up on
> PL 67. But I could not find any mode-descriptions on the web
> page that gave this kind of detail. So forgive me for guessing...
> or for not finding the right info...
>
> Bob
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
AMSAT Home