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CX2SA > SATDIG 27.10.09 21:05l 558 Lines 16941 Bytes #999 (0) @ WW
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Sent: 091027/1904Z @:CX2SA.LAV.URY.SA #:12608 [Minas] FBB7.00e $:AMSATBB4574
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Nova Satellite Prediction Program (Andrew Rich)
2. Re: Ares (David - KG4ZLB)
3. Re: Ares (Rocky Jones)
4. Re: Ares (Rocky Jones)
5. Re: Nova Satellite Prediction Program (jeffk13057@xxxxx.xxxx
6. Re: Nova Satellite Prediction Program (Mark L. Hammond)
7. Re: LVB Tracker Interface (John Kopala)
8. tracking programs (Jerry)
9. Re: requesting help on a RF link solution (imaginary, ka-band
link!) (Achim Vollhardt)
10. Re: Handy Sat predictor (Pat McGrath)
11. Plan 13 in Python (Mark VandeWettering)
----------------------------------------------------------------------
Message: 1
Date: Wed, 28 Oct 2009 02:40:24 +1000
From: "Andrew Rich" <vk4tec@xxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Nova Satellite Prediction Program
To: <Jimcknwire@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <131E31278C3C407B82AA91CD7479F5CF@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
LINUX predict
----- Original Message -----
From: <Jimcknwire@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, October 28, 2009 2:15 AM
Subject: [amsat-bb] Nova Satellite Prediction Program
> Installed, reinstalled, changed versions- multiple problems with
> calculating scripts. What program should I change to?
> _______________________________________________
> 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
------------------------------------------------------------------------------
--
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.423 / Virus Database: 270.14.33/2461 - Release Date: 10/26/09
20:22:00
------------------------------
Message: 2
Date: Tue, 27 Oct 2009 12:48:56 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Ares
To: vk4tec@xxxxxxxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4AE72478.5000007@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Here! <http://en.wikipedia.org/wiki/Ares_I-X>
Andrew Rich wrote:
> What is ARES and what is on it ?
>
> ----- Original Message ----- From: "Bob McGwier" <rwmcgwier@xxxxx.xxx>
> To: <kg4zlb@xxxxx.xxx>
> Cc: <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, October 28, 2009 2:03 AM
> Subject: [amsat-bb] Re: Ares
>
>
>
>
>
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--
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.423 / Virus Database: 270.14.33/2461 - Release Date:
> 10/26/09 20:22:00
>
>
--
David
KG4ZLB
www.kg4zlb.com
------------------------------
Message: 3
Date: Tue, 27 Oct 2009 11:52:29 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Ares
To: <rwmcgwier@xxxxx.xxx>, <kg4zlb@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W34EC0109F2CA6BBA3479BDD6B90@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Bob. It happens all the time on both the high seas and in the air. Both
planes and ships try and cut the corner as tightly as possible and sometimes
"nick" it...most of the time it is just people who unintentionally got a
little close. Both the FAA and USCG are usually pretty forgiving about it.
Robert WB5MZO
> Date: Tue, 27 Oct 2009 12:03:28 -0400
> From: rwmcgwier@xxxxx.xxx
> To: kg4zlb@xxxxx.xxx
> CC: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: Ares
>
> One has to say that it ought to be a question: How does a slow moving
> cargo ship drift into the range safety box without being anticipated and
> cause a weather window to be missed and eventually a scrub? These are
> expensive exercises and tough questions need to be asked. I bet if you
> go near that box tomorrow (or whenever), you are like to be met with a
> flotilla and an air force and will be lucky to escape some form of sanction.
>
> PLUS, I WANTED A LAUNCH!
>
> ;-)
>
> Bob
> N4HY
>
>
> David - KG4ZLB wrote:
> > Not yet it hasn't!
> >
> > Weather problems.
> >
> >
> >
> > rwmcgwier@xxxxx.xxx wrote:
> >
> >> Launch at 9:49 am edt
> >> Sent from my Verizon Wireless BlackBerry
> >> _______________________________________________
> >> 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-NA member? Join now to support the amateur satellite program!
> > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
> >
> >
>
>
> --
> (Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
> Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
> NJQRP, QRP ARCI, QCWA, FRC.
> "You don't need to see the whole staircase, just
> take the first step.", MLK.
> Twitter:rwmcgwier
> Active: Facebook,Myspace,LinkedIn
>
>
> _______________________________________________
> 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
_________________________________________________________________
Windows 7: It helps you do more. Explore Windows 7.
http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WLMTA
GL:ON:WL:en-US:WWL_WIN_evergreen3:102009
------------------------------
Message: 4
Date: Tue, 27 Oct 2009 12:04:21 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Ares
To: <vk4tec@xxxxxxxxxxxxx.xxx>, <rwmcgwier@xxxxx.xxx>,
<kg4zlb@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W21D5B77A5A3FDF79A77F5D6B90@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
The Ares 1-X is part of the latest attempt by NASA to develop a shuttle
followon. There have been quite a few attempts in the past, this one has
gotten farther then most.
The Ares 1 will (if it is built and that is iffy) have a 5 segment solid
rocket booster as its first stage and a second stage with a modified J-2 on
it (the Saturn third and second stage engine).
The 1-x is really a "test" vehicle. The only active part of it is an old
Shuttle SRB (which is a four segment solid), a dummy fifth segment and the
rest is all boilerplate. The flight will last under 2 minutes. So far it
has cost over 600 million dollars. The entire project to date has consumed
9 billion more. The actual vehicle will be as expensive as the shuttle to
launch. (if that can be believed)
There are a number of "what ifs" ...no one has ever human rated a vehicle
with a solid first stage. The USAF looked at doing that with the MX and
figured out that the thing would shake the crew very badly. But the "rocket
scientist" at NASA are smarter then everyone else and they think that they
ahve the pogo issues solved. Some good guesses are that the vehicle will
have pogo of about 10 percent of thrust...that would be a pretty tough ride.
Of course the USAF is not for sure that it wont hit the tower on launch...so
who knows.
Robert WB5MZO
_________________________________________________________________
New Windows 7: Find the right PC for you. Learn more.
http://www.microsoft.com/windows/pc-scout/default.aspx?CBID=wl&ocid=PID24727::
T:WLMTAGL:ON:WL:en-US:WWL_WIN_pcscout:102009
------------------------------
Message: 5
Date: Tue, 27 Oct 2009 17:05:42 +0000
From: jeffk13057@xxxxx.xxx
Subject: [amsat-bb] Re: Nova Satellite Prediction Program
To: Jimcknwire@xxx.xxxx amsat-bb-bounces@xxxxx.xxxx amsat-bb@xxxxx.xxx
Message-ID:
<546930398-1256663142-cardhu_decombobulator_blackberry.rim.net-1530065412-@xxx
xxx.xxxx.xxxx.xx.xxxxxxxxxx>
Content-Type: text/plain
if you're using windows try Orbitron. Love it.
Good luck
Jeff WB2SYK
------Original Message------
From: Jimcknwire@xxx.xxx
Sender: amsat-bb-bounces@xxxxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Nova Satellite Prediction Program
Sent: Oct 27, 2009 12:15
Installed, reinstalled, changed versions- multiple problems with
calculating scripts. What program should I change to?
_______________________________________________
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 from my Verizon Wireless BlackBerry
------------------------------
Message: 6
Date: Tue, 27 Oct 2009 13:34:16 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Nova Satellite Prediction Program
To: amsat-bb@xxxxx.xxxx Jimcknwire@xxx.xxx
Message-ID:
<5d8cecfe0910271034i2fa61b87n65f4fe3f7f4fa439@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Jim,
In my book that's easy. SatPC32
73,
Mark N8MH
> Nova Satellite Prediction Program (Jimcknwire@xxx.xxxx
> Date: Tue, 27 Oct 2009 12:15:36 EDT
> From: Jimcknwire@xxx.xxx
> Subject: [amsat-bb] ?Nova Satellite Prediction Program
> To: amsat-bb@xxxxx.xxx
> Message-ID: <cfd.64ee15d5.381876a8@xxx.xxx>
> Content-Type: text/plain; charset="US-ASCII"
>
> Installed, reinstalled, changed versions- multiple problems with
> calculating scripts. What program should I change to?
>
------------------------------
Message: 7
Date: Tue, 27 Oct 2009 10:41:07 -0700
From: John Kopala <jkopala@xxxxx.xxx>
Subject: [amsat-bb] Re: LVB Tracker Interface
To: amsat-bb@xxxxx.xxxx asquires@xxxxxxx.xxx.xx
Message-ID: <4AE730B3.8050902@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I used a small radio shack board, a couple of transistors, and 2 DPDT (could
be SPDT) 5V relays
to duplicate the interface in the G5400B controller in the KR-500, including
the DIN plug connection.
The LVB tracker should easily interface to the G5400B Yaesu rotor controller.
John Kopala
N7JK
Date: Sun, 25 Oct 2009 17:13:13 +1100
From: "Drew Squires" <asquires@xxxxxxx.xxx.xx>
Subject: [amsat-bb] LVB tracker
To: <amsat-bb@xxxxx.xxx>
Message-ID: <6F5EBD8D450D4E6E8E859CB501D9F379@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Has any Amsat member experience using the LVB tacker with Yaesu G1000DXC and
KR-500 rotators?
Is it easy?possible?Or impossible ?
With thanks Andy VK3AS
------------------------------
Message: 8
Date: Tue, 27 Oct 2009 13:04:01 -0500
From: "Jerry" <W0SAT@xxx.xxx>
Subject: [amsat-bb] tracking programs
To: <amsat-bb@xxxxx.xxx>
Message-ID: <BLU0-SMTP626A4F0B6DC2F11B62430DE4B90@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi : I keep reading on the BB that a lot of people have trouble with
There satellite tracking programs.
I can remember getting on FO-20 every day for years with about
4 operators every day for years without a tracking program at
all.
Jerry w0sat
------------------------------
Message: 9
Date: Tue, 27 Oct 2009 18:09:36 +0100
From: Achim Vollhardt <avollhar@xxxxxx.xxx.xx>
Subject: [amsat-bb] Re: requesting help on a RF link solution
(imaginary, ka-band link!)
To: amsat-bb@xxxxx.xxx
Message-ID: <4AE72950.7030208@xxxxxx.xxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Samundra,
don't see which path loss you assumed, but for 1 AU (149 mill km), I
calculate 286 dB @xx GHz.
Also 3000K seems much to bad.. assume 300K.
So let's add up for 1 AU:
40 dBm (10W) +2x56.4 dBi -286 = -133.2 dBm at RX input
1 Gbit/s assumes 1 GHz bandwidth. 300K is roughly -174 dBm/Hz.
1 GHz = 60dB worse = -116 dBm.
So you end up with -133.2 - (-116) = -17.4 Eb/No.. not good.
If you add 20dB you end up at 2.6 dB Eb/No. Not brilliant, but close.
20dB means 0.1 AU instead of 1 AU = 14.9 Mill km.
I think your result was 4.6E9 m (!), not km.. which is 4.6 mill km.
Should be it, if getting back to your assumed 3000K RX.
73s Achim, DH2VA
> Date: Tue, 27 Oct 2009 06:03:30 -0400
> From: Samudra Haque <samudra.haque@xxxxx.xxx>
> Subject: [amsat-bb] requesting help on a RF link solution (imaginary
> ka-band link!)
> To: Amsat-bb <amsat-bb@xxxxx.xxx>
> Message-ID:
> <d8c724880910270303k9a3b9cch123289eebcaebf90@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi, amsat-bb
>
> CQ any satellite link budget expert !
>
> I'm trying to do a calculation on my own based upon published specs
> for the NASA MRO Ka-band experiment, but am getting some unexpected
> results for a Ka-band simplex link with Temp=3000K (hypothetical),
> operating with a Signal to Noise ratio (unitless) figure of 1.171
> (representing 4.5 dB eb/no with a data rate of 1 Gbps and a bandwidth
> of 2.4x109 Hz)
>
> Question : is 1 gbps not 1x109 bps ?
>
> Question : if both antennas are 3m parabolic (both are the same type)
> with 56.4 dBi boresight gain, what would you think the furthest
> distance the link can perform with SNR of 1.171. I have actually used
> a padding of 3 dB Eb/No in my link budget, so am not worried about any
> further signal loss at first (ok, I should be ..) For the exercise, I
> am choosing a 10 Watt estimated output on an arbitrary basis.
>
> So:
>
> P_t = 10W
>
> G_t = 56.4 dBi = G_r , can we assume the same gain for TX and RX on a
> parabolic dish ?
>
> T = 3000K at receiver
>
> SNR = 1.171 required
>
> f=32.2 GHz
>
> B = 2.4E9 Hz, (bpsk, ldpc code 0.5)
>
> DR = 1E9 bps
>
> So, I am puzzled why this link budget says the range with these
> parameters is equal to 4.644 x 109 Km -- that seems to be a long
> distance ! What am I not able to conceptualize.
>
>
> BTW, I know if I send this out, the answer will come to me soon
> thereafter, but for education, I would like to know where the problem
> in my understanding lies !
>
>
> Samudra N3RDX
>
>
> ------------------------------
------------------------------
Message: 10
Date: Tue, 27 Oct 2009 11:49:12 -0700
From: "Pat McGrath" <ka6tya@xxxx.xxx>
Subject: [amsat-bb] Re: Handy Sat predictor
To: "Pedro Converso" <lu7abf@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <116681B2FABF4332B8E1972E740E1A8A@xxxxxxx>
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
Great program.
Why not have one for Amsat-BB?
----- Original Message -----
From: "Pedro Converso" <lu7abf@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Thursday, October 22, 2009 5:45 PM
Subject: [amsat-bb] Handy Sat predictor
> There is a simple one page (or screen) sat predictor for most used birds
> at
>
> http://amsat.org.ar/?f=d
>
> After setting your grid locator you get next passes in local time at your
> location.
>
> If using mobile phone or pda navigate to http://lu7aa.org.ar
>
> 73, lu7abf, Pedro
>
>
>
> _______________________________________________
> 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: 11
Date: Tue, 27 Oct 2009 11:56:14 -0700
From: Mark VandeWettering <kf6kyi@xxxxx.xxx>
Subject: [amsat-bb] Plan 13 in Python
To: amsat-bb@xxxxx.xxx
Message-ID:
<d8eb7a910910271156m120f398fx3b2ad33dd0d382b2@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Bruce's recent experiments with the AVR port of Plan 13 has reminded
me that I should make a public release of my Python implementation.
I keep thinking that I am going to get to making improvements, but
somehow I never seem to get around to do doing it, so rather than just
delaying, I'll toss it out in its current state and let people
experiment with it. It currently includes a plan 13 module, a module
for converting maidenhead grid squares and a couple of example scripts
(most notably an "elements" script, for fetching elements, and a
"nextpass" script that can be used to find details of the next pass of
a satellite, mostly useful for LEO sats, but which illustrate the use
of the plan 13 module). Feel free to download and use this code for
your own experimentation: it's under an open source license whose only
significant feature is to acknowledge Miller's original Plan13 code.
The code runs under Python 2.5, and can be found at:
http://brainwagon.com/files/pyham-0.1.tar.gz
I'd be interested in hearing of any adaptations, extensions or uses of
this code.
73 Mark K6HX
------------------------------
_______________________________________________
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 4, Issue 574
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