| |
CX2SA > SATDIG 05.10.09 21:05l 461 Lines 14424 Bytes #999 (0) @ WW
BID : AMSATBB4518
Read: GUEST
Subj: AMSAT-BB-digest V4 518
Path: IZ3LSV<IK2XDE<DB0RES<ON0AR<HS1LMV<7M3TJZ<CX2SA
Sent: 091005/1904Z @:CX2SA.LAV.URY.SA #:7449 [Minas] FBB7.00e $:AMSATBB4518
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: "Final" Symposium Agenda Posted (Bob McGwier)
2. Re: Understanding ITAR (Bob Bruninga )
3. Re: AO-51 L/S? (i8cvs)
4. LLCROSS spacecraft (Davidoff, Martin)
5. Re: NF (i8cvs)
6. Re: Question regarding WISP and operating satellite BBS
(Mark L. Hammond)
----------------------------------------------------------------------
Message: 1
Date: Mon, 05 Oct 2009 07:16:25 -0400
From: Bob McGwier <rwmcgwier@xxxxx.xxx>
Subject: [amsat-bb] Re: "Final" Symposium Agenda Posted
To: amsat-bb@xxxxx.xxx
Message-ID: <4AC9D589.4070100@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I want to send a personal thanks to the selfless volunteers who do this
every year. Frank especially has done this several times and keeps
coming back for the same punishment. Thank you all.
Bob
Frank H. Bauer wrote:
> All,
>
> We have posted the "Final" Agenda for the 2009 AMSAT Symposium, including
> the presentation schedule. I call it "Final" because everything is subject
> to change.
>
> We are still looking for some volunteers for the following responsibilities:
>
> 1) Paper Session Chairs (introduce speaker, time presentation, use the
> "hook" if paper runs long) for the 5 paper sessions
> 2) AV table support (1 hour commitment or more during paper
> presentations)
> 3) Registration table (1 hour commitment or more)
> 4) Poster session Chair/security (1 hour commitment or more and only
> when the poster session is open to the public)
>
> If you are interested in supporting any of these, e-mail me directly
> (ka3hdo@xxxxxxx.xxxx and let me know what interests you and what dates/times
> you would like to support. We can really use your help on this as it is a
> critical element of making the 2009 symposium a success.
>
> And for those who have not done it already..please sign up for the
> symposium. We have a fantastic program planned.
>
> 73, Frank Bauer, KA3HDO
> 2009 AMSAT Symposium Co-Chair
> _______________________________________________
> 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
------------------------------
Message: 2
Date: Mon, 5 Oct 2009 08:00:00 -0400 (EDT)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: Understanding ITAR
To: "Bob McGwier" <rwmcgwier@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <20091005080000.ABT67563@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
The absurdity of it all, is that a large percentage of science, math,
technical and engineering students in all USA colleges and Universities are
foreign nationals. So we are already doing more than just talking to them,
we are teaching it to them,
And another absurdity is the popular opinion that Iran or North Korea or any
other developing country doesn't have the smarts or techincal know-how to
make the bomb. See paragraph #1.
And then crown it all with the fact that the USA is something like 30th?
down in the quality of education for its k-12 schools. If we want to think
about a country that doesn't have the smarts to accomplish great things,
then it is us. See para #2.
Bob
---- Original message ----
>Date: Mon, 05 Oct 2009 07:14:42 -0400
>From: amsat-bb-bounces@xxxxx.xxx (on behalf of Bob McGwier
<rwmcgwier@xxxxx.xxx>)
>Subject: [amsat-bb] Re: Understanding ITAR
>To: amsat-bb@xxxxx.xxx
>
>I want everyone seeing this to read a book. Little Brother by Cory
>Doctorow is a book aimed at late teens to young adults. This is
>irrelevant. It is a must read for anyone who doesn't understand the
>nature of the problems. It is a DEVASTATING treatment of several
>current event topics, including anti-terrorism approaches, internet
>privacy, and more.
>
>I find one of the best sections of the book to be its treatment of
>"false positives". The exact same mathematics applies to this ITAR
>export prevention problem. The cost of dealing with ITAR is so high in
>comparison to catching the real events that it should be the poster
>child for stupidity of the entire approach to security. It has, in my
>opinion, NOT been worth the cost and I believe in safeguarding those
>things which are in the interests of U.S. security. I am not a believer
>in stupidity. I do not subscribe to civil disobedience on this topic
>because of the cost to my family and friends and it has cost me the
>ability to talk to my friends for YEARS. U.S. "enemies" have
>developed on their own or done effective espionage to get all of the
>technology they need. This has been a truly tragic episode for U.S.
>space corporations and a great boon to those nations who aspire to be
>space faring nations rather than be trapped by we and our "friends" to
>the earth's surface.
>
>A spacecraft, or anything associated with the launch of spacecraft,
>including ground systems (including amateur radio equipment) is DEFINED
>to be an ITAR covered item. No one says it is a munition as in a gun.
>It is DEFINED to be an ITAR covered item. Discussion of it with foreign
>nationals by U.S. citizens is a "deemed export" and requires an export
>license AND THEN, the most insidious of all, a technology assistance
>agreement. The technology assistance agreement in most cases must
>contain language that the foreign entity (person, group, etc.) must
>agree to be bound by U.S. law even if they are NEVER enter U.S. I
>believe now that AMSAT-NA is going to be allowed to talk to our
>friends. I believe in the end it will not be an onerous set of
>restrictions. But I am SO glad I am not attempting to sell a satellite
>or ground equipment as a U.S. person (individual, corporation, green
>card holder) to a foreign national. The pucker factor is so high
>because the cost of a mistake is punitive, that you simply cannot afford
>casual conversations much less technical discussions without an army of
>lawyers and minders present.
>
>I wish I could find the words to impart the depth of my despair on what
>this has meant to everyone involved in space in the U.S. from lowly
>amateur radio operators trying to build satellites to major U.S.
>corporations. It has done NOTHING effective in my opinion but make lots
>of lawyers wealthier and insure the long term survival of bureaucrats.
>
>Bob
>
>
>
>
>--
>(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
------------------------------
Message: 3
Date: Mon, 5 Oct 2009 14:13:53 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: AO-51 L/S?
To: "Bob- W7LRD" <w7lrd@xxxxxxx.xxx>, <ao51-modes@xxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <005e01ca45b5$4e84bec0$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="utf-8"
----- Original Message -----
From: "Bob- W7LRD" <w7lrd@xxxxxxx.xxx>
To: <ao51-modes@xxxxx.xxx>; <ao51-modes@xxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Sunday, October 04, 2009 8:03 PM
Subject: [amsat-bb] AO-51 L/S?
> Hello Gents
< snip>
The only way I have for "tweeking" my S band gear is to put a -35Dbm signal
source at the end of my driveway and tweeking my equipment and antennas.
Real world evaluation is always the proof of success.
>
> 73 Bob W7LRD
>
Hi Bob W7LRD
Instead to use a -35 dBm signal source why you don't try to receive the
Sun-Noise ? Using my 4 feet parabolic dish and an overall Noise Temperature
of 75 kelvin (1 dB NF) of my receiving system with 50 kelving from the cold
sky yesterday I got 3,5 dB of Sun-Noise with the actual 72 sfu (Solar Flux
Units ) which is a very low value of Sun activity.at 2800 MHz 10.7 cm
Using the program NOISE.EXE this metod allow you to compute if the Sun-Noise
level that you receive is in agreement or not with the receiving parameters
of your receiving system i.e. it is a small radioastronomy exercise and a
more accurate method than using a Signal-Source.
In a separate email I have sent to you the progam NOISE.EXE
The site where to get daily the Radio Flux in sfu at 2800 MHz 10.7 cm as
requested by NOISE.EXE is:
http://www.swpc.noaa.gov/ftpdir/indices/DSD.txt
73" de
i8CVS Domenico
------------------------------
Message: 4
Date: Mon, 5 Oct 2009 08:58:51 -0400
From: "Davidoff, Martin" <MDAVIDOFF@xxxxxx.xxx>
Subject: [amsat-bb] LLCROSS spacecraft
To: <amsat-bb@xxxxx.xxx>
Message-ID:
<F9E6C5C179DF4447AAFF0CEBCA02468C326A8D@xxx.xxxx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
QST
Anyone reading the agenda for the AMSAT conference next weekend may have
noticed the LLCROSS event scheduled for Friday Morning
6:30-9 am LCROSS "Lunar Bash", LCROSS spacecraft crashes into
a South Pole Lunar Crater
This is a real-time live event. Impact is scheduled for 7:31:30 a.m.
EDT
More info at http://www.spaceflightnow.com/lcross/091005preview/
K2ubc
------------------------------
Message: 5
Date: Mon, 5 Oct 2009 15:27:13 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: NF
To: "Fitri Rahmawati" <fitri_9979@xxxxx.xxx>, "AMSAT-BB"
<amsat-bb@xxxxx.xxx>
Message-ID: <005801ca45bf$8cf1b000$0201a8c0@xxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Fitri ,
The sensitivity of Yaesu FT-847 at 144/430 MHz with preamplifier ON is
0.125 uV for a S/N ratio of 10 dB into a Bandwidth of 2400 Hz in SSB
To convert the above sensitivity into Noise Figure NF in dB we can use the
following formula:
-6 2
( Vin x 10 ) x 20
NF = [ 10 log ---------------------------- ] + 174
dB 10 BW x S/N
Where:
Vin = Applied input voltage in uV over 50 ohm RX input impedance
BW = Bandwidth in Hz
S/N = Signal to Noise ratio in power ratio and not dB
Working the numbars for a FT 847 in SSB we get:
-6 2
( 0.125 x 10 ) x 20
NF = [ 10 log ------------------------- ] + 174 = 5.14 dB
dB 10 2400 x 10
A Noise Figure NF = 5.14 dB in SSB with preamplifier ON is
a good value.
73" de
i8CVS Domenico
----- Original Message -----
From: "Fitri Rahmawati" <fitri_9979@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, October 04, 2009 10:27 AM
Subject: [amsat-bb] NF
hi,
sorry I'm new
how exactly NF at Yaesu FT-847 transceiver for UHF 437,325 mhz ( 69 cm ) ?
Thank's
Fitri Rahmawati - Indonesia
_______________________________________________
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: 6
Date: Mon, 5 Oct 2009 11:15:14 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: Question regarding WISP and operating
satellite BBS
To: amsat-bb@xxxxx.xxx
Message-ID:
<5d8cecfe0910050815gc8a474m5f4da7e7b22af583@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Shamai,
What you are seeing is a problem that has a vareity of solutions.
There is not one program that does everything you need to do! So, you
may have to run more than one program at a time.
I run SatPC32 to control my rotators and radio VFOs AND I also run
WISP to run the PBBS software and to schedule other programs to run
for specific satellites. So, I run both programs all the time.
For GO-32 KISS reception, try using Mike DK3WN's excellent software
ONLINE KISS+ to capture a KISS File and then decode it with his
TECHSAT-1B (GO-32) Telemetry Beacon Decoder.
You can download both here: http://www.dk3wn.info/software.shtml
There are other solutions to our problem (using Wisp and WispDDE for
frequency control). But I much prefer SatPC32 for radio/rotors and
WISP for TNCS and scheduling programs.
For example, with GO-32 you can have Wisp run the ONLINE KISS+
software instead of the PBBS MSPE program. It is just a configuration
matter.
I hope that helps!
73,
Mark N8MH
___________________
Hi all
I am trying to download telemetry from GO-32 in KISS mode, and later on,
I would also like to operate the AO51 BBS.
I tried two ways. In both there is something missing... I hope someone
will be able to give me some advise...:
Way #1. With SatPC32.
SatPC32 provides good tracking capabilities. I get automatic receiving
frequency control via CAT, including Doppler compensation, and I get
automatic antenas control via the LVBTracker. However, I am missing a
software to capture the KISS information in a file, and will also need to
work with the PACSAT protocol for the BBS.
Way #2. With WISP.
I succeeded to get the antennas rotor control working by WISP, but so far I
could not learn how to control the transceiver frequencies, and also
to automaitcally switch from receive to transmit for sending packets and
requests to the satellite.
I have an ICOM IC910H and a Kantronic 9612Plus TNC.
My PC is a laptop with only USB ports..., no RS232. I am using USB to
RS232 converters, but I don't think i can access hardware pins of the DB25
after the converters, for the T/R control.
Thanks & 73,
Shamai
4Z1WS
--
Mark L. Hammond [N8MH]
------------------------------
_______________________________________________
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 518
****************************************
Read previous mail | Read next mail
| |
