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CX2SA > SATDIG 25.11.13 22:03l 123 Lines 3944 Bytes #999 (0) @ WW
BID : AMSATBB8422
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Subj: AMSAT-BB-digest V8 422
Path: IZ3LSV<IK2XDE<ON4HU<CX2ACB<CX2SA
Sent: 131125/2002Z @:CX2SA.SAL.URY.SA #:917 [Salto] FBB7.00e $:AMSATBB8422
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Multiple satellite launches (John Fickes)
2. Re: FUNCUBE Europe Pass Video (Cor .)
----------------------------------------------------------------------
Message: 1
Date: Mon, 25 Nov 2013 10:36:58 -0600
From: John Fickes <kc0bmf@xxxxx.xxx>
To: Robert Bruninga <bruninga@xxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>, rtassi@xxxxxxx.xxx
Subject: [amsat-bb] Re: Multiple satellite launches
Message-ID:
<CAG-+cOZE-QhwxPyk31m9WVOZDcfa91R-ChBzsj+nVEP3ipM3gA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Bob
The following link is of Picodragon and 2 other satellites being released
or launched. There is a picture and short video.
http://amsat-uk.org/tag/picodragon/
73 John KC0BMF
On Mon, Nov 25, 2013 at 9:54 AM, Robert Bruninga <bruninga@xxxx.xxx> wrote:
> ? When there is a launch of several satellites in a single payload,
> several cubesats for example, I assume they release each at
> different locations on the deployer trajectory. Preliminary keps are based
> on the trajectory when each is released?
>
> ? Otherwise if they were released all at once, how would NORAD know which
> is which?
>
>
> Doesn?t much matter when they are released, they still are all in the same
> orbit more or less for quite a while. Even if the springs release them at
> 1/2 meter per second, they are all going at 7000 meters per second so it
> takes days for them to separate very much.
>
>
>
> Let?s see, at ? meter per second separation, then they are 100? apart
> after the first minute, 1 mile after the first hour. And not until they
> are a few miles apart can NORAD distinguish them enough to start getting
> good tracks on them. By then it is impossible to know which is which.
> Hence the guessing game until each owner decides which object best fits his
> downlink experience.
>
>
>
> Continuing on, they will be 24 miles apart after the first day where they
> will be about 5 seconds apart when tracked from the ground. After a week,
> then maybe 175 miles and ? minute apart. After a month, maybe 750 miles
> and 2 minutes apart. After a year, maybe 9000 miles and 30 minutes apart.
> And finally, after about a year and a half, they will be half an orbit or
> about 45 minutes apart, beyond which, they start getting closer again?
>
>
>
> Something like that unless I screwed up?
>
>
>
> Bob
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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>
------------------------------
Message: 2
Date: Mon, 25 Nov 2013 19:18:49 +0100
From: "Cor ." <kenwoodtrx@xxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: FUNCUBE Europe Pass Video
Message-ID: <DUB124-W348FB34074AE112DF05675C2ED0@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello Jef,
Thank you verry much for this video recording with the
position of Funcube-1 on your tracker software.
Nice to hear all the stations!
This was my second pass attempt over the new funcube-1
satellite.
This shows funcube satellite health is good.
I hope it will life long!
Good luck for all stations trying this nice bird.
73's Cor PD0RKC
I captured a streaming web server from the Netherlands of the afternoon
FUNCube
pass and recorded the audio.
Large file ~ 18 meg.
https://dl.dropboxusercontent.com/u/8254410/FUNCUBE112413.wmv
Jeff
K2SDR
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 8, Issue 422
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