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CX2SA > SATDIG 14.10.13 21:11l 465 Lines 13529 Bytes #999 (0) @ WW
BID : AMSATBB8351
Read: GUEST
Subj: AMSAT-BB-digest V8 351
Path: IZ3LSV<IR1UAW<IK1NHL<CX2SA
Sent: 131014/1904Z @:CX2SA.SAL.URY.SA #:12188 [Salto] FBB7.00e $:AMSATBB8351
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Theoretical Question (Dave Marthouse)
2. Re: Theoretical Question (lucleblanc6@xxxxxxxxx.xxx
3. Re: Theoretical Question (Bryce Salmi)
4. Fw: [DXMAPS] DXMAPS 2.6 now supports AIS (i8cvs)
5. Not reveiving messages from the AMSA-BB (i8cvs)
6. looking for person who posted the "Help Wanted" message
(Ron Settle)
7. Not receiving messages from the AMSA-BB (i8cvs)
8. 2013 AMSAT-NA Symposium Presentations (Alan)
9. space weather (wa4hfn@xxxxxxx.xxxx
10. Need help dismantling KR-500 (Richard Limebear)
11. Re: Need help dismantling KR-500 (Glenn AA5PK)
12. Re: Need help dismantling KR-500 (Brian Hougesen)
----------------------------------------------------------------------
Message: 1
Date: Sun, 13 Oct 2013 18:30:35 -0400
From: "Dave Marthouse" <dmarthouse@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Theoretical Question
Message-ID: <3C61DD4BEB8040CC95F555F281734FDF@xxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
This isn't a question regarding amateur satellites but it is an interesting
theoretical one to pose here and the same laws of physics apply. I know
that the higher the frequency that is transmitted from a satellite the
larger the Doppler shift will be. The Iridium satellites transmit at around
1.5gHZ. At that frequency I know the Doppler is large. How do they manage
to keep the portable handsets on the ground locked to the signal? Are the
handsets frequency agile to an extent? How do they achieve frequency lock
so that the digital signals are decoded?
Dave Marthouse N2AAM
dmarthouse@xxxxx.xxx
------------------------------
Message: 2
Date: Sun, 13 Oct 2013 21:55:25 -0400
From: lucleblanc6@xxxxxxxxx.xx
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] Re: Theoretical Question
Message-ID: <525B4F0D.15020.21D5AD6@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; CHARSET=US-ASCII
On 13 Oct 2013 at 18:30, Dave Marthouse wrote:
> This isn't a question regarding amateur satellites but it is an interesting
> theoretical one to pose here and the same laws of physics apply. I know
> that the higher the frequency that is transmitted from a satellite the
> larger the Doppler shift will be. The Iridium satellites transmit at around
> 1.5gHZ. At that frequency I know the Doppler is large. How do they manage
> to keep the portable handsets on the ground locked to the signal? Are the
> handsets frequency agile to an extent? How do they achieve frequency lock
> so that the digital signals are decoded?
>
>
>
> Dave Marthouse N2AAM
> dmarthouse@xxxxx.xxx
>
Interesting question Dave
I suspect as the XM/SIRIUS radio a data signal is sent back to the receiver
position to minimized the doppler effect and some sort of data
error correction also help to counteract the doppler effect. A similar
system is implemented into the wxtoimg NOAA weather satellite fax
decoding software.
It is an educated guess who only need to be reeducated... Lets say my Sirius
receiver in a plain flat field suffer some signal breaks that
i can't explain.
Luc Leblanc VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 3
Date: Mon, 14 Oct 2013 00:57:20 -0700
From: Bryce Salmi <bstguitarist@xxxxx.xxx>
To: lucleblanc6@xxxxxxxxx.xx
Cc: Amsat BB <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: Theoretical Question
Message-ID:
<CAN5j0soGpdJirptUKu+7Cng0cg55T=1kUg=H4O-EFE0FN=U3wA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I found this paper:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0C
C4QFjAA&url=http%3A%2F%2Fmarine.rutgers.edu%2F~kerfoot%2Fpub%2Fslocum%2FRELEAS
E_6_32%2Fsrc%2Fdoco%2Fspecifications%2Firidium-phone%2FIR_Lband.doc.rtf&ei=U6N
bUrCdCuakiQLXgoGwAw&usg=AFQjCNHpZ7_Jh9hNlGLTvRbkVi2o7ancYQ&sig2=bC2RkaZCSpODi-
QVR7z2mA&bvm=bv.53899372,d.cGE
Which seems to state that the subscribers of Iridium communications (the
handset) adjust for Doppler shift. Each satellite is spaced such that there
is also a "guard band" so they don't interfere with each other.
Bryce
On Sun, Oct 13, 2013 at 6:55 PM, <lucleblanc6@xxxxxxxxx.xx> wrote:
> On 13 Oct 2013 at 18:30, Dave Marthouse wrote:
>
> > This isn't a question regarding amateur satellites but it is an
> interesting
> > theoretical one to pose here and the same laws of physics apply. I know
> > that the higher the frequency that is transmitted from a satellite the
> > larger the Doppler shift will be. The Iridium satellites transmit at
> around
> > 1.5gHZ. At that frequency I know the Doppler is large. How do they
> manage
> > to keep the portable handsets on the ground locked to the signal? Are
> the
> > handsets frequency agile to an extent? How do they achieve frequency
> lock
> > so that the digital signals are decoded?
> >
> >
> >
> > Dave Marthouse N2AAM
> > dmarthouse@xxxxx.xxx
> >
> Interesting question Dave
>
> I suspect as the XM/SIRIUS radio a data signal is sent back to the
> receiver position to minimized the doppler effect and some sort of data
> error correction also help to counteract the doppler effect. A similar
> system is implemented into the wxtoimg NOAA weather satellite fax
> decoding software.
>
> It is an educated guess who only need to be reeducated... Lets say my
> Sirius receiver in a plain flat field suffer some signal breaks that
> i can't explain.
>
>
>
>
> Luc Leblanc VE2DWE
> WAC BASIC CW PHONE SATELLITE
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Mon, 14 Oct 2013 11:09:03 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, <kb2wrd@xxx.xxx>
Subject: [amsat-bb] Fw: [DXMAPS] DXMAPS 2.6 now supports AIS
Message-ID: <003b01cec8bd$084dbe90$0401a8c0@xxxxx>
Content-Type: text/plain; charset="UTF-8"
----- Original Message -----
From: KB2WRD@xxx.xxx
To: DXMAPS@xxxxxxxxxxx.xxx
Sent: Monday, October 14, 2013 12:40 AM
Subject: Re: [DXMAPS] DXMAPS 2.6 now supports AIS
Why are you sending me other peoples posts when I supposedly un subscribed
to DXMAPS A while ago?
Sincerely
Rob K2WRD
Hi Rob, K2WRD
I have the same problem receiving a lot of spam from DXMAPS without any my
request. To day I have unsubscribed but I don't know if this will be
succesfull or not.
What you suggest to do to solve the problem ?
I suppose that many others AMSAT-BB users are receiving daily the same spam
messages from DXMAPS
Thanks for any suggestion
73" de i8CVS Domenico
------------------------------
Message: 5
Date: Mon, 14 Oct 2013 11:27:51 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, <kb2mu@xxxxx.xxx>
Subject: [amsat-bb] Not reveiving messages from the AMSA-BB
Message-ID: <002b01cec8bf$a83d4720$0401a8c0@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Paul, KB2MU
>From day 8 Oct 2013 at 15:01:01-0400 I am not receiving any message from
AMSAT-BB
The last message I have received is the following one :
Re: A reminder - Say "Hi" to Juno, george abbott
Can you explain to me why ? Is the AMSAT-BB down for us in Europe ?
Thanks for replay.
73" de
i8CVS Domenico
------------------------------
Message: 6
Date: Mon, 14 Oct 2013 05:25:01 -0500
From: "Ron Settle" <settleron@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] looking for person who posted the "Help Wanted"
message
Message-ID: <022501cec8c7$a4a00280$ede00780$@xxx>
Content-Type: text/plain; charset="us-ascii"
Please contact me off list.
73
Ron
WM9Q
WM9Q@xxxx.xxx
------------------------------
Message: 7
Date: Mon, 14 Oct 2013 13:22:12 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, "Paul Williamson"
<kb5mu@xxxxx.xxx>
Subject: [amsat-bb] Not receiving messages from the AMSA-BB
Message-ID: <001b01cec8cf$a1d30630$0401a8c0@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Paul, KB5MU
>From day 8 Oct 2013 at 15:01:01-0400 I am not receiving any message from
AMSAT-BB
The last message I have received is the following one :
Re: A reminder - Say "Hi" to Juno, george abbott
Can you explain to me why ? Is actually AMSAT-BB down for us in Europe ?
Thanks for replay.
73" de
i8CVS Domenico
------------------------------
Message: 8
Date: Mon, 14 Oct 2013 07:07:03 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, "SAREX-BB" <SAREX@xxxxx.xxx>
Subject: [amsat-bb] 2013 AMSAT-NA Symposium Presentations
Message-ID: <BD0C17DB210B46398DF518A8BE033972@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi,
The list of presentations for the 2013 AMSAT-NA Symposium has been released
and may be found here:
http://ww2.amsat.org/?page_id=1564http://
73s,
Alan
WA4SCA
------------------------------
Message: 9
Date: Mon, 14 Oct 2013 15:30:21 +0000 (UTC)
From: wa4hfn@xxxxxxx.xxx
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] space weather
Message-ID:
<991617859.4089826.1381764621474.JavaMail.root@xxxxxxx.xxxxxxxxxxx.xx.xxxx.xxx
xxxx.xxx>
Content-Type: text/plain; charset=utf-8
M-CLASS FLARE, EARTH-DIRECTED CME: October 13th began with an explosion on
the sun. At 00:43 UT, sunspot AR1865 erupted, producing an M1-class solar
flare and an Earth-directed CME. NASA's Solar Dynamics Observatory captured
the explosion's flash of extreme UV radiation:
Check spaceweather.com
Damon
------------------------------
Message: 10
Date: Mon, 14 Oct 2013 17:19:41 +0100
From: Richard Limebear <Richard@xxxxx.xxxxx.xx.xx>
To: Amsatbb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Need help dismantling KR-500
Message-ID: <525C199D.6030305@xxxxx.xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Its been up on the mast 20+ years but still turns ok. I now have it off the
mast
and, before I sell it, I'd like to clean it up, replace the grease etc.
Loosening the screws has been quite a journey, strong wrench and lots of
blowlamp. Before I finally open it up I recall that someone had put
dismantling
instructions online somewhere but I can't find them; grateful for a pointer
and/or other tips. Also which grease to use (USA greases are not available
here
in the UK).
73
Richard G3RWL
------------------------------
Message: 11
Date: Mon, 14 Oct 2013 11:53:32 -0500
From: "Glenn AA5PK" <aa5pk@xxxxxxxxxx.xxx>
To: <Richard@xxxxx.xxxxx.xx.xx>, "Amsatbb" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Need help dismantling KR-500
Message-ID: <5DE64321007841C4AE063E788618C7EF@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Here's a link to the G-5500 elevation rotor disassembly/assembly.
I believe the KR-500 is the same (or nearly so).
<http://ivok.home.xs4all.nl/pa1ivo/G-5500.html>
73
Glenn AA5PK
----- Original Message -----
From: "Richard Limebear" <Richard@xxxxx.xxxxx.xx.xx>
To: "Amsatbb" <amsat-bb@xxxxx.xxx>
Sent: Monday, October 14, 2013 11:19 AM
Subject: [amsat-bb] Need help dismantling KR-500
> Its been up on the mast 20+ years but still turns ok. I now have it off
the mast
> and, before I sell it, I'd like to clean it up, replace the grease etc.
>
> Loosening the screws has been quite a journey, strong wrench and lots of
> blowlamp. Before I finally open it up I recall that someone had put
dismantling
> instructions online somewhere but I can't find them; grateful for a pointer
> and/or other tips. Also which grease to use (USA greases are not available
here
> in the UK).
>
> 73
> Richard G3RWL
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Mon, 14 Oct 2013 19:00:45 +0200
From: Brian Hougesen <hougeman@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Need help dismantling KR-500
Message-ID: <525C233D.6070907@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello Richard.
This might be what your look for.
http://www.dl3lar.de/KRx00.html
Regards
Brian
OZ1SKY
> Its been up on the mast 20+ years but still turns ok. I now have it
> off the mast and, before I sell it, I'd like to clean it up, replace
> the grease etc.
>
> Loosening the screws has been quite a journey, strong wrench and lots
> of blowlamp. Before I finally open it up I recall that someone had put
> dismantling instructions online somewhere but I can't find them;
> grateful for a pointer and/or other tips. Also which grease to use
> (USA greases are not available here in the UK).
>
> 73
> Richard G3RWL
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
_______________________________________________
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 351
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