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CX2SA > SATDIG 11.09.12 23:12l 430 Lines 12755 Bytes #999 (0) @ WW
BID : AMSATBB7295
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Subj: AMSAT-BB-digest V7 295
Path: IZ3LSV<ED1ZAC<CX2SA
Sent: 120911/1902Z @:CX2SA.SAL.URY.SA #:1273 [Salto] FBB7.00e $:AMSATBB7295
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: e: Satellite technical question (i8cvs)
2. Re: Camera on an antenna (i8cvs)
3. Re: Camera on an antenna (Robert Bruninga)
4. Re: PROITERES (Simon Pack)
5. Microwave Spectrum Issues at EME 2012 (Trevor .)
6. Re: Camera on an antenna (i8cvs)
7. Re: PROITERES (GW1FKY@xxx.xxxx
8. Proiteres (PY5LF)
9. AMSAT-UK Symposium streaming this year? (Alan P. Biddle)
10. Increasing Popularity Of CubeSats (B J)
----------------------------------------------------------------------
Message: 1
Date: Mon, 10 Sep 2012 23:31:55 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Nick Pugh" <quadpugh@xxxxxxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: e: Satellite technical question
Message-ID: <00a801cd8f9b$b42c08e0$0301a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Nick ,
The equivalent noise temperature of an antenna do not depends by it's
phisical temperature but only by the noise temperature emitted by the
object that the main lobe of the antenna is looking.
The equivalent noise temperature of the antenna radiation resistance
do not depends by the phisical temperature of the antenna but only
by the noise temperature emitted by the object that the main lobe of
the antenna is looking.
As an example, if you install a parabolic dish on the Nort Pool at very low
temperature and a similar parabolic dish in the desert at the equator at
high temperature and you point both the antennas toward the Sun than the
received Sun Noise will be the same no matter the structural temperature
of both dishes will be.
Of coarse only the phisical temperature of the antenna preamplifiers and
all the associated receivers phisical temperature must be the same.
73" de
i8CVS Domenico
----- Original Message -----
From: "Nick Pugh" <quadpugh@xxxxxxxxx.xxx>
To: "'Nick Pugh'" <quadpugh@xxxxxxxxx.xxx>; <amsat-bb@xxxxx.xxx>
Sent: Sunday, September 09, 2012 8:15 PM
Subject: [amsat-bb] Re: e: Satellite technical question
I am sorry I did not mean the physical temperature What I wanted is the
equivalent noise temperature.
Thanks for those who replied
nick
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Nick Pugh
Sent: Sunday, September 09, 2012 10:07 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] e: Satellite technical question
e: Satellite technical question
Assume a cubesat with a monopole ? wave antenna at 400 mhz. The satellite is
in full sun with a 500km orbit. What is the antenna temperature in full sun
and in eclipse?
TNX in advance
Nick CAPE Team
------------------------------
Message: 2
Date: Mon, 10 Sep 2012 23:51:49 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "James Luhn" <luhn@xx.xxx>, "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Camera on an antenna
Message-ID: <00e601cd8f9e$7b8aa160$0301a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi James, W5AOO
To mount a camera on a beam in order to locate the moon to work
EME is a very bad procedure.
The correct procedure is to point the antenna system toward the Sun
and get the maximum Sun Noise on receiver.
As soon the maximum Sun Noise is received please calibrate the
Azimuth and the Elevation of your control box relative to the Sun
position.
If the control box is well calibrated with the position of the Sun than
it will be very well calibrated also for the Moon position.
I use the above procedure for my antenna system and I am very happy
with it.
73" de
i8CVS Domenico
----- Original Message -----
From: "James Luhn" <luhn@xx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, September 08, 2012 7:22 PM
Subject: [amsat-bb] Camera on an antenna
> Please don't ya'll laugh too hard at me. Has anyone ever mounted a
> camera on a beam? Now I am not trying to see AO40, but I would like to
> simply double check the location of my beam for eme. If anyone has
> mounted a camera on a beam, I would be interested in what you used.
> Yes, I know all about beam width vs the moon. I just hate to call CQ
> with my beams pointed to the ground due to some Murphy type of failure.
>
> 73,
> -james
> W5AOO
------------------------------
Message: 3
Date: Mon, 10 Sep 2012 18:20:17 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: i8cvs <domenico.i8cvs@xxx.xx>, James Luhn <luhn@xx.xxx>, Amsat -
BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Camera on an antenna
Message-ID: <1b5ce3bfd15b891e21cf699dcd03b84f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'd say that differently...
Nothing wrong with using the camera. But your point is well taken to
calibrate the camera to the BEAM by first pointing at the sun. Then (if
your camera survives) the camera is a perfectly good aiming device for the
moon and it eliminates any errors in the Antenna controller and pots. Bob
-----Original Message-----
> To mount a camera on a beam in order to locate the moon
> to work EME is a very bad procedure.
> The correct procedure is to point the antenna system
> toward the Sun and get the maximum Sun Noise on receiver.
> As soon the maximum Sun Noise is received please calibrate
> the Azimuth and the Elevation of your control box relative
> to the Sun position.
----- Original Message -----
From: "James Luhn" <luhn@xx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, September 08, 2012 7:22 PM
Subject: [amsat-bb] Camera on an antenna
> Please don't ya'll laugh too hard at me. Has anyone ever mounted a
> camera on a beam? Now I am not trying to see AO40, but I would like to
> simply double check the location of my beam for eme. If anyone has
> mounted a camera on a beam, I would be interested in what you used.
> Yes, I know all about beam width vs the moon. I just hate to call CQ
> with my beams pointed to the ground due to some Murphy type of failure.
>
> 73,
> -james
> W5AOO
_______________________________________________
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, 10 Sep 2012 23:54:22 +0100
From: "Simon Pack" <simon@xxxx.xxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: PROITERES
Message-ID: <1AB624654F2949D5A4A7F6F2BD32D0A7@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi All,
I too was listening for PROITERES, and made a recording today (Sep 10th
11:15UTC) using my FunCube Dongle.
Looking at the spectrum display, I could see the distinctive pattern of two
satellites transmitting.
It turns out that the orbit of SEEDS II (CO-66) was almost in perfect
alignment with PROITERES, and was also transmitting its morse code beacon on
437.485MHz.
I heard 'JQ1YGU SEEDS G4 3475BFB0 D83 FFE CCA 189 8ED 35F' etc. from SEEDS.
See http://cubesat.aero.cst.nihon-u.ac.jp/english/seeds_2_e.html
It is possible that some people listening for PROITERES today have actually
mistakenly heard SEEDS II, as I found it a few dB stronger at times.
The two satellites will drift apart over the next 2 days.
73's Simon G7WIQ
------------------------------
Message: 5
Date: Mon, 10 Sep 2012 23:54:43 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Microwave Spectrum Issues at EME 2012
Message-ID:
<1347317683.71911.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The spectrum issues faced by moon-bounce (EME) operators are similar to
those affecting the Amateur-satellite Service, see this video made by
volunteers from the British Amateur Television Club (BATC)
http://www.uk.amsat.org/?p=10253
73 Trevor M5AKA
------------------------------
Message: 6
Date: Tue, 11 Sep 2012 01:21:58 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Robert Bruninga" <bruninga@xxxx.xxx>, "James Luhn" <luhn@xx.xxx>,
"Amsat - BBs" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Camera on an antenna
Message-ID: <001501cd8fab$14e76120$0301a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Bob,
Using a calibrated camera on the Sun is a good system to point the
antenna on the Moon only when there are no clods and when the
sky is clear.
On the other side a well calibrated control box on the Sun Noise is a
goood system to point the antenna at the Moon with any wheader
condition even with clods and this make the difference.
73" de
i8CVS Domenico
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
To: "i8cvs" <domenico.i8cvs@xxx.xx>; "James Luhn" <luhn@xx.xxx>; "Amsat -
BBs" <amsat-bb@xxxxx.xxx>
Sent: Tuesday, September 11, 2012 12:20 AM
Subject: RE: [amsat-bb] Re: Camera on an antenna
> I'd say that differently...
>
> Nothing wrong with using the camera. But your point is well taken to
> calibrate the camera to the BEAM by first pointing at the sun. Then (if
> your camera survives) the camera is a perfectly good aiming device for the
> moon and it eliminates any errors in the Antenna controller and pots. Bob
>
> -----Original Message-----
> > To mount a camera on a beam in order to locate the moon
> > to work EME is a very bad procedure.
>
> > The correct procedure is to point the antenna system
> > toward the Sun and get the maximum Sun Noise on receiver.
>
> > As soon the maximum Sun Noise is received please calibrate
> > the Azimuth and the Elevation of your control box relative
> > to the Sun position.
>
>
> ----- Original Message -----
> From: "James Luhn" <luhn@xx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Saturday, September 08, 2012 7:22 PM
> Subject: [amsat-bb] Camera on an antenna
>
>
> > Please don't ya'll laugh too hard at me. Has anyone ever mounted a
> > camera on a beam? Now I am not trying to see AO40, but I would like to
> > simply double check the location of my beam for eme. If anyone has
> > mounted a camera on a beam, I would be interested in what you used.
> > Yes, I know all about beam width vs the moon. I just hate to call CQ
> > with my beams pointed to the ground due to some Murphy type of failure.
> >
> > 73,
> > -james
> > W5AOO
>
> _______________________________________________
> 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: 7
Date: Mon, 10 Sep 2012 20:49:42 -0400 (EDT)
From: GW1FKY@xxx.xxx
To: simon@xxxx.xxxxx.xx.xxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: PROITERES
Message-ID: <5f53.664a2d51.3d7fe4a6@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi Simon,
Thanks for the clarification - That was exactly what I experienced and was
rather confused until I played back
a short recording and realised that I was not having a receiver problem.
Regards
Ken
GW1FKY
------------------------------
Message: 8
Date: Mon, 10 Sep 2012 22:44:10 -0300
From: "PY5LF" <py5lf@xxxxxxxxxxxxx.xxx.xx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Proiteres
Message-ID: <002c01cd8fbe$f21c1fa0$d6545ee0$@xxxxxxxxxxxxx.xxx.xx>
Content-Type: text/plain; charset="us-ascii"
Hi
Proiteres signal heard a few minutes ago ;
http://www.youtube.com/watch?v=Dx4WnoQ_CTk
73
PY5LF
Luciano Fabricio
Curitiba-PR-BR GG54jm
------------------------------
Message: 9
Date: Tue, 11 Sep 2012 08:06:42 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AMSAT-UK Symposium streaming this year?
Message-ID: <5E54F74916E248BA9A991BF71C2C84AB@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi,
In the past, BATC has streamed the symposium. Will they be doing so this
year?
Alan
WA4SCA
-----------------------------------
We haven haven't got the money,
so we we've got to think.
Lord Rutherford
------------------------------
Message: 10
Date: Tue, 11 Sep 2012 16:03:32 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Increasing Popularity Of CubeSats
Message-ID:
<CAP7QzkMNHu5wCE7O8WGQB8xXAE8vsNJ2N+3_BKCuAttyLOM27A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://thespacereview.com/article/2155/1
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
_______________________________________________
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 7, Issue 295
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