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CX2SA > SATDIG 09.03.13 22:02l 86 Lines 2321 Bytes #999 (0) @ WW
BID : AMSATBB878
Read: GUEST
Subj: AMSAT-BB-digest V8 78
Path: IZ3LSV<IK2XDE<ON4HU<CX2ACB<CX2SA
Sent: 130309/2002Z @:CX2SA.SAL.URY.SA #:4169 [Salto] FBB7.00e $:AMSATBB878
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: inquiry about homebrew az-el systems (PA3GUO)
2. Re: We-Wish decay (Masahiro Arai)
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Message: 1
Date: Fri, 8 Mar 2013 22:31:57 +0100
From: PA3GUO <pa3guo@xxxxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: inquiry about homebrew az-el systems
Message-ID: <20130308223158.GB2UR.26070.root@xxxxxxxx>
Content-Type: text/plain; charset=utf-8
>Just think -- with TWO of them, you could compensate for the motion of the
station, when operating from, say, a
boat or a vehicle under way. (Nobody say "GPS" please!)
Hi Gus, you asked for it :-)
http://www.g6lvb.com/ao40mobile.htm
So also here Howard sets the standard, nobody beats him - respect!
Btw: here is my 18 year old project, it still works fine after so many years:
http://pa3guo.com/zb_rtr_ctrl.html
Things I learned and included in my software:
- thresholds are needed to avoid the system oscillating around a target
position
- corrections need to be made due to overshoot (after a stop command the
rotor takes time to actually stop
--
Henk, PA3GUO
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Message: 2
Date: Sat, 09 Mar 2013 11:42:39 +0900
From: Masahiro Arai <m-arai@x.xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: We-Wish decay
Message-ID: <201303090242.AA00104@xxxxxx.x.xxxxx.xx.xx>
Content-Type: text/plain; charset=iso-2022-jp
Here is the altitude plot of WE WISH and other four CubeSats which
were deployed from ISS at 4th Oct 2012.
http://www.ne.jp/asahi/m-arai/gkz/5CubeSats_Altitude.png
Only WE WISH is moving fast toward earth. Its trace is very similar
to ARISSat-1.
Time line of ARISSat-1 aligns to the five CubeSats deployment date.
73
Masa JN1GKZ Tokyo Japan
>
>As solar activity will likely increase slightly in the coming days,
>the decay of We-Wish may already occur on Sunday, March 10 (UTC).
>
>73,
>Nico PA0DLO
>
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End of AMSAT-BB Digest, Vol 8, Issue 78
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