OpenBCM V2.0.2 (Linux)

Packet Radio Mailbox

IZ3LSV

[San Dona' di P. JN]

 Login: GUEST





  
CX2SA  > SATDIG   18.10.08 14:25l 851 Lines 25861 Bytes #999 (0) @ WW
BID : 41602_CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V3 532
Path: IZ3LSV<IK2XDE<ON4HU<F4BWT<YO6PLB<CX2SA
Sent: 081018/1220Z @:CX2SA.LAV.URY.SA #:41602 [Minas] FBB7.00e $:41602_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To  : SATDIG@WW


Today's Topics:

1.  Marex News SSTV status Oct 17 (MM)
2. Re: KLM polarity switch schematic (i8cvs)
3.  S-Band RADOME (D. Mynatt)
4.  Relay replacement (Dave Guimont)
5.  WD9EWK from Tucson AZ hamfest, Saturday (18 October)
(Patrick STODDARD (WD9EWK/VA7EWK))
6.  ISS SSTV intercepted at FM18 17 Oct 2007 (Robert Morales)
7. Re: [sarex] Re: SSTV on over UK (Louis McFadin)
8. Re: ISS Pass Today (Dennis Rogers)
9.  FW:   Gray Tenn. Hamfest sellout (Stargate)
10.  ISS & SATPC32 and IC-910 (Mike McConnell)
11. Re: ISS & SATPC32 and IC-910 (George Henry)
12.  ARISS CONTACT WITH RICHARD GARRIOTT (Graham Shirville)
13.  More Pics this AM (Simon (HB9DRV))
14. Re: SSTV Algorithms? (Greg D.)
15.  Delfi-c3 Telemetry Capture & Decoding (Clive Wallis)
16.  SSTV Active 08.23utc over UK (David Barber)
17.  2  ISS SSTV photo's  at orbit number 56791 (Cor)


----------------------------------------------------------------------

Message: 1
Date: Fri, 17 Oct 2008 12:13:42 -0700 (PDT)
From: MM <ka1rrw(AT)yahoo.com>
Subject: [amsat-bb]  Marex News SSTV status Oct 17
To: AMSAT-BB(AT)amsat.org
Message-ID: <280264.26730.qm(AT)web56407.mail.re3.yahoo.com>
Content-Type: text/plain; charset=us-ascii

ISS Amateur Radio Status: October 17, 2008
By Miles Mann WF1F,

Slow Scan TV Status

MAREX-MG News	www.marexmg.org
Manned Amateur Radio Experiment

Hello all:
I hope you have been enjoying the Slow Scan TV show from the International
Space Station.

Current Status:
ISS has two operational SSTV systems running.  This morning The ISS crew used
the Laptop version from MarexMG called SpaceCam1 for a few images (October 17,
09:32 UTC).  And then later the same day switched over to the Battery powered
Kenwood VC-H1 System.

VC-H1:
Since the VC-H1 will only run on batteries, (and it does go through 4 AA
batteries in a very short time), Garriott's will only be using the VC-H1 when
he is near by to shut it off when ISS goes into the shadow of the Earth.
I do not expect much usage of the VC-H1 after Garriott's mission is over.  The
VC-H1 was flow as a last-minute back up because of a problem with missing
cables for the SpaceCam1 platform and a problem with the existing VOX box.

SpaceCam1:
In August 2006, ISS commander Pavel ran some Slow Scan TV tests from ISS.
http://www.marexmg.org/imagessstv/SpaceCamImages1.htm

During the testing we heard from a few reliable ground stations that the
transmitter was getting stuck ON and the radio's watch-dog timer would
shutdown the radio after 3 minutes of continuous transmission.  We were never
able to debug the problem in flight.  It was assumed that there was some stray
audio or RF that may have been keeping the VOX box in a constant transmit
state.

In June this summer a quick decision was made to send a full backup TM-D700
and full set of cables and new VOX Box up to ISS for Garriott's mission on the
next available Progress Cargo rocket. Now we have plenty of cables, radios and
theoretically two VOX boxes and a VC-H1.

The SpaceCam1 software has been used from ISS several days this past week,
including October 12 and 17.  We have heard rumors that the transmitter is
staying keyed.  If this is true, it means we need a better VOX box solution.
SpaceCam1 has the ability to be left running 24/7.  If we can achieve this
goal, we will be able to present SSTV images to everyone around the whole
world.

VOX Box Replacement Project:
The Marex team is working on a new project proposal to replace the existing
VOX box with an USB Off-the-Shelf version.  We have been testing a production
version for a few months now with SpaceCam with excellent results.  We had
tentatively planned on presenting the project at the July Moscow ARISS
meeting, however due to cut backs in the meeting schedules there were just too
many project and not enough time to work in more project presentations.

If you feel there is a benefit to the amateur radio community to provide 24/7
SSTV down link images, then please support Marex and the VOX Box Replacement
Project.  Contact your ARISS delegates and ask them too to support Marex SSTV
from Space.

Sincerely

Miles Mann WF1F  Marexmg.org


ARISS Delegates:

http://www.rac.ca/ariss/arissinf.htm


Slow Scan TV Links and Free SSTV software links.
http://www.marexmg.org/fileshtml/sstvlinkpage.html

The standard downlink of 145.800 will be used for voice contacts, school
contacts and SSTV transmissions. Anyone with a FM receiver capable of
monitoring the 145.800 MHz downlink can receive audio and SSTV images. The
standard voice uplink frequencies of 145.200 for ITU Region 1 (Europe, Africa
and Russia) and 144.490 for ITU regions 2 & 3 (N. America, S. America,
Southern Asia, Australia) will be used.

Additional info on SSTV operations is available at:
http://www.marexmg.org/fileshtml/howtouseiss.html

Ground stations are encouraged to capture as many of the transmitted
SSTV images and forward them to the Marex at SSTV(AT)ISSSPACECAM.ORG

After you receive an image, please rename the images using the following
format, (All Lower case letters). All dates and times must be in UTC.

Year 08, Month 10, Day 14, (UTC time), Call sign,
(optional Short text description) .JPG

Example:
0810141905wf1f.jpg
or
0810141905wf1fgreatlakes.jpg
If you are not a licensed amateur operator, just place your initials
after the time (0607311905abc.jpg)

We would also like to know the following information in your email:
Name or Call sign
Country / State
Receiver
Software decoding tool
Elevation or range of ISS when you decoded the image.

The best image received for a given time period will be posted to
http://www.issspacecam.org/
and
www.marexmg.org

Additional information about Richard Garriott's flight and activities are
available at:
http://www.richardinspace.com/
http://www.challenger.org/
http://www.ariss.org/


If you do not have a tracking program, here is a live link to NASA that will
show you where ISS is located.

http://spaceflight.nasa.gov/realdata/tracking/index.html


Pictures of the Amateur Radio station on the International Space Station.

http://www.marexmg.org/fileshtml/radiohardware.html


Slow Scan TV:
The Marex Slow Scan TV project, SpaceCam1 was activated for a few weeks in
August 2006.  We hope to see some new images in October 2008

http://www.marexmg.org/imagessstv/SpaceCamImages1.htm



Marexmg Web page
http://www.marexmg.org

73 Miles WF1F MAREX-MG

Until we meet again

DOSVIDANIYA Miles WF1F




__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around
http://mail.yahoo.com


------------------------------

Message: 2
Date: Fri, 17 Oct 2008 22:44:19 +0200
From: "i8cvs" <domenico.i8cvs(AT)tin.it>
Subject: [amsat-bb] Re: KLM polarity switch schematic
To: "Angelo Friend" <n5uxt(AT)email.com>, "AMSAT-BB" <amsat-bb(AT)amsat.org>
Message-ID: <003601c93099$21a71f60$0201a8c0(AT)tin.it>
Content-Type: text/plain;	charset="iso-8859-1"

Hi Angelo,

In a separate email I have sent to you 3 enlarged pictures of the PCB
for the KLM polarity switcher.

Please note that the holes from one side to the other side of the PCB
are metallized.

When soldering the new relay do not use a too high temperature for the
soldering iron otherwise the studs of relay becames oxidated  (blue color)

If possible use solder from ALPHA METALS INC with 62 Sn, 36 PB and
2 Ag

73" de

i8CVS Domenico

----- Original Message -----
From: "Angelo Friend" <n5uxt(AT)email.com>
To: <amsat-bb(AT)amsat.org>
Sent: Friday, October 17, 2008 1:59 PM
Subject: [amsat-bb] KLM polarity switch schematic


> I just took down my polarity switch for my 2 meter KLM and I need to do
> some work with it. I just receivedthe new relay to install but I may have
> damaged a trace or two.  So anyone have pictures (without reply
> installed) or schematic of the board itself??? Thanks in advance. 73 de
> Angelo
>
> --
> Be Yourself (AT) mail.com!
> Choose From 200+ Email Addresses
> Get a Free Account at www.mail.com
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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: Fri, 17 Oct 2008 16:18:41 -0600
From: "D. Mynatt" <dave(AT)mynatt.biz>
Subject: [amsat-bb]  S-Band RADOME
To: "AMSAT-BB" <amsat-bb(AT)amsat.org>
Message-ID: <D48DC403BDE645AC85D8773CF75289A8(AT)compaq>
Content-Type: text/plain;	charset="iso-8859-1"

Any one using an SSB 2.4 GHz. Light Weight RADOME Parabolic Antenna? I'm
thinking of using two in a satellite setup. Any one have experience with these
units or types of units?


Dave Mynatt
Program Director
========================
http://sciencecenter.no-ip.org
SID ID: S-0258
APRS Tier II Server (AT) pueblo.aprs2.net:14501
LAT: 38'16.278" N
LON: -104'40.537" W
Alt: 1460m
DM78qd // KA0SWT

------------------------------

Message: 4
Date: Fri, 17 Oct 2008 16:48:37 -0700
From: Dave Guimont <dguimon1(AT)san.rr.com>
Subject: [amsat-bb]  Relay replacement
To: n5uxt(AT)email.com
Cc: amsat-bb(AT)amsat.org
Message-ID:
	<20081017234838.XCKI18245.cdptpa-omta06.mail.rr.com(AT)Dave.san.rr.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

Hi Angelo,

Very good advice, as usual, Dom...

I replaced mine years ago, got mine out of the junk box, and it did
not exactly make contact with some of the foil on the board...I just
made a jumper from small diameter copper, and it has been up there
for years...same thing if some of the traces are missing..

I live fairly near the coast, and have the typical salt water corrosion...



73, Dave, WB6LLO
dguimon1(AT)san.rr.com

Disagree: I learn....

Pulling for P3E...



------------------------------

Message: 5
Date: Fri, 17 Oct 2008 16:55:45 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb(AT)wd9ewk.net>
Subject: [amsat-bb]  WD9EWK from Tucson AZ hamfest, Saturday (18
	October)
To: amsat-bb(AT)amsat.org
Message-ID: <791458.48250.qm(AT)web56105.mail.re3.yahoo.com>
Content-Type: text/plain; charset=us-ascii

Hi!

I will be part of the AMSAT table at the Old Pueblo Radio Club's
hamfest in Tucson AZ tomorrow.  The hamfest is at the Kino Sports
Complex on Ajo Way, east of I-10, in grid DM42me.  During the hamfest,
I am planning to do several satellite demonstrations as WD9EWK.

For AO-51, I hope to have a Scout at the mic to contact other Scouts
during those passes.  If not, I will try to make contact with Scouts,
in keeping with AMSAT's wishes for the AO-51 JOTA configuration this
weekend.  Besides AO-51, I plan on trying SO-50, FO-29, and VO-52.

This will be the first time I will do demonstrations on non-FM
satellites with my two FT-817NDs at a hamfest.  On FO-29, I tend to
end up around 435.850-435.855 MHz on the downlink.  For VO-52, I
generally work around 145.910-145.915 MHz on the downlink.  Of course,
if there are stations around these spots already, I will move to another
spot on the passbands - probably a little higher - so my non-automated
station doesn't QRM others.

Since the ISS will be passing by in the morning, I will be listening
during those passes.  If someone is on the microphone up there making
contacts, I will try to make a contact from the hamfest.

I will send QSL cards to all stations that make contacts with WD9EWK
from the hamfest.  No need to send me anything first, if we make a
contact tomorrow.

73!



Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/



------------------------------

Message: 6
Date: Fri, 17 Oct 2008 22:04:04 -0400
From: "Robert Morales" <wp4bqv(AT)gmail.com>
Subject: [amsat-bb]  ISS SSTV intercepted at FM18 17 Oct 2007
To: AMSAT-BB(AT)amsat.org
Message-ID:
	<1a0d229d0810171904p25d017a1w5e017b8128a8d1f1(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I received a total of 3 SSTV transmissions today (17 Oct 2008) at grid
FM18.  The transmission at 2031z was mostly clear depicting the Soyuz module
with Earth in the background.  The other two earlier ones were pretty
noisy/ghostly.  Received using MMSTV in Robot36 format (auto selected).

Gear here: Yaesu FT-857 with 2m/440 Ringo in the attic.

image:
http://www.facebook.com/photo.php?pid=2023113&l=49f0c&id=734741410



--
R. L. Morales, WP4BQV
wp4bqv(AT)gmail.com
http://journals.aol.com/wp4bqv/RadioIntercepts/
Echolink node#  165727
APRS mobile: WP4BQV-7
"Eschew Obfuscation"


------------------------------

Message: 7
Date: Fri, 17 Oct 2008 15:55:07 -0500
From: Louis McFadin <w5did(AT)mac.com>
Subject: [amsat-bb] Re: [sarex] Re: SSTV on over UK
To: Luc Leblanc <lucleblanc6(AT)videotron.ca>
Cc: amsat-bb(AT)AMSAT.Org, sarex(AT)AMSAT.Org, eu-amsat(AT)yahoogroups.com
Message-ID: <90EC0C64-00BF-45BE-BD7B-C124B1A02027(AT)mac.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

That particular thing happens when the VC-H1 is left on and the
battery runs down. Obviously Richard accidently left the VC-H1 on. I
have accidently done that many times. When there is not enough power
to run the camera there is a blank screen but the other electronics is
still running and it captures a blank image and sends it down. Since
the transmitter is powered separately so it's not bothered by the
battery running down.


Lou McFadin
W5DID
ARISS US Hardware manager


On Oct 17, 2008, at 7:56 AM, Luc Leblanc wrote:

> On 17 Oct 2008 at 10:44, David Barber wrote:
>
>> SSTV on over UK.
>
>> Long silent carrier before and after images though.
>
>
> On the 1235 pass (Mostly over the atlantic) no transmission has been
> received yesterday only blue empty pics where transmitted in the last
> pass of the day. I am guessing the school contact takes priority?
>
>> From my "souvenirs" favorites folders:
>
> http://www.arrl.org/news/stories/2004/12/09/1/?nc=1
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> WAC BASIC CW PHONE SATELLITE
>
>
>
> ----
> Sent via sarex(AT)amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/sarex






------------------------------

Message: 8
Date: Fri, 17 Oct 2008 18:09:14 -0500
From: "Dennis Rogers" <n5vrp.satx(AT)gmail.com>
Subject: [amsat-bb] Re: ISS Pass Today
To: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID:
	<4f220a840810171609m640ccb48p50df09b4711e8644(AT)mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I had know problems hearing all audio here in EL09rk, San Antonio, Tx this
morning.
W5KWQ, Richard was talking to a group of kids answering there questions from
a school.
Only could pick up his part of the QSO, but did get him 59+ with an
eggbeater (2m/70cm)
setup on a TS2000X.

73's
-------------------------------
Regards,

Dennis, N5VRP
n5vrp.satx(AT)gmail.com

Dstar User / Gateway Admin / D-PRS Provider
ARRL Member
Cactus-Intertie Member
AMSAT Member, President's Club

73's from SATX, EL09rk


------------------------------

Message: 9
Date: Fri, 17 Oct 2008 19:48:06 -0400
From: "Stargate" <stargatesg1(AT)verizon.net>
Subject: [amsat-bb]  FW:   Gray Tenn. Hamfest sellout
To: "Amsat-Bb" <amsat-bb(AT)amsat.org>
Message-ID: <HLENIILIDNGDDDJIDEMFCEGNGJAA.stargatesg1(AT)verizon.net>
Content-Type: text/plain; charset=iso-8859-1

Well, life is weird. I'm not going to attend the hamfest tomorrow. Things
are up in the air as of now about allot of things.
I don't know which direction I am going. Up or down. Left or right. Back or
forth. Selling out or not.

There is the possibility of some cash soon due to the sell
of a house so.......

As they say.....

"If Mama isn't happy, nobody is" if you catch the way I have drifted.

If I do COMMIT to the sellout, I will let you all know for sure.

73's
RoD
KD0XX



-----Original Message-----
From: amsat-bb-bounces(AT)amsat.org [mailto:amsat-bb-bounces(AT)amsat.org]On
Behalf Of R. Chastain
Sent: Monday, October 13, 2008 7:21 PM
To: Amsat-BB
Subject: [amsat-bb] Gray Tenn. Hamfest sellout


Hello all,
?
?? I really HATE to do this but unless something drastic happens this week
(IE...hitting the lottery) I am going to sell out of ham radio and
electronics in general.
?
?? I have been collecting satellite gear for the past few years and have not
even used most of it. Alot of the items are brand new. ARR Preamps, M2 CP
VHF and UHF antenna's, (the BIG one's)?Rohn 45 tower parts, ect...
?
The radio's are..
?
Kenwood TS-790A with 1.2Ghz and IF-232 computer module
Yaesu FT-847
?
Both radio's are in excellent condition (8-9 out of a 10)
?
I also have 3 service monitors and assorted test gear that I will be
selling.
2 ea IFR 1000S and 1ea. Cushman CE-50TG
?
I will be attending the Gray Tennessee hamfest, located in northeast
Tennessee on the 18th of October.
?
If your wanting to build up a topnotch satellite, or VHF/UHF station, Please
come by and visit my table.
?
I don't have a list compiled yet but it will be quite a lot.
?
Thanks and 73's
RoD
KD0XX



_______________________________________________
Sent via AMSAT-BB(AT)amsat.org. 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: 10
Date: Fri, 17 Oct 2008 21:35:34 -0500
From: "Mike McConnell" <w0pd(AT)mchsi.com>
Subject: [amsat-bb]  ISS & SATPC32 and IC-910
To: <amsat-bb(AT)amsat.org>
Message-ID: <006801c930ca$32ec6510$98c52f30$(AT)com>
Content-Type: text/plain;	charset="us-ascii"

Is SATPC32 supposed to switch the IC-910 to the correct VHF TX/RX
frequencies (as it does for sats) in mode U/V?  If so, how do you do it. I
was just playing with the radio and software and it seems to command the RX
frequency but the TX frequency isn't correct. I was thinking about trying to
talk to the ISS sometime.>Thanks





Mike McConnell, Ph.D.

W0PD







------------------------------

Message: 11
Date: Fri, 17 Oct 2008 23:05:43 -0500
From: "George Henry" <ka3hsw(AT)att.net>
Subject: [amsat-bb] Re: ISS & SATPC32 and IC-910
To: "Mike McConnell" <w0pd(AT)mchsi.com>, "amsat bb" <amsat-bb(AT)amsat.org>
Message-ID: <E6A645B8EB9541B58A58F863E6B9A8E6(AT)parents>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

For 2 meter up- and downlink (the normal mode for ISS), you must use the
special ISS version of SatPC32, SatPC32ISS, which puts the transceiver in
"split" mode, rather than satellite mode.  You must also provide a
handshaking signal to your serial port to prevent the software from trying
to change frequencies while transmitting.

See the file SatPCISS.txt in the program folder for details.

Good luck!!

George, KA3HSW


----- Original Message -----
From: "Mike McConnell" <w0pd(AT)mchsi.com>
To: <amsat-bb(AT)amsat.org>
Sent: Friday, October 17, 2008 9:35 PM
Subject: [amsat-bb] ISS & SATPC32 and IC-910


> Is SATPC32 supposed to switch the IC-910 to the correct VHF TX/RX
> frequencies (as it does for sats) in mode U/V?  If so, how do you do it. I
> was just playing with the radio and software and it seems to command the
> RX
> frequency but the TX frequency isn't correct. I was thinking about trying
> to
> talk to the ISS sometime.>Thanks
>
>
>
>
>
> Mike McConnell, Ph.D.
>
> W0PD



------------------------------

Message: 12
Date: Sat, 18 Oct 2008 07:26:46 +0100
From: "Graham Shirville" <g.shirville(AT)btinternet.com>
Subject: [amsat-bb]  ARISS CONTACT WITH RICHARD GARRIOTT
To: <amsat-bb(AT)AMSAT.Org>
Message-ID: <CE4EE2D98B1446C6957EA5C3F463AF6A(AT)allgood.local>
Content-Type: text/plain;	charset="iso-8859-1"

Hi all,

The ARISS team led by Carlos Eavis G0AKI from RSGB and Howard Long G6LVB from
AMSAT-UK provided a perfect ARISS School Contact yesterday.

The local BBC Television news report can be found here - plenty of good
"amateur radio" references are included!

http://news.bbc.co.uk/1/hi/england/7677274.stm

as they say - enjoy:)


73

Graham G3VZV

PS a copy of the webstreamed video of the whole QSO will shortly be available
at www.batc.tv


------------------------------

Message: 13
Date: Sat, 18 Oct 2008 08:54:22 +0200
From: "Simon \(HB9DRV\)" <simon(AT)hb9drv.ch>
Subject: [amsat-bb]  More Pics this AM
To: "AMSAT.org" <amsat-bb(AT)amsat.org>
Message-ID: <F9ABBD494DFD4A30A00C10FB514BBF23(AT)doubletrouble>
Content-Type: text/plain;	charset="iso-8859-1"

http://www.ham-radio-deluxe.com/SSTV/tabid/85/Default.aspx

SSTV working great - no excess carriers etc. Now to take the dogs for a walk
before his flies directly over my house in 90 minutes.

Simon Brown, HB9DRV
www.ham-radio-deluxe.com

------------------------------

Message: 14
Date: Sat, 18 Oct 2008 00:20:04 -0700
From: "Greg D." <ko6th_greg(AT)hotmail.com>
Subject: [amsat-bb] Re: SSTV Algorithms?
To: "Simon (HB9DRV)" <simon(AT)hb9drv.ch>, Curt Nixon
	<cptcurt(AT)flash.net>,	<amsat-bb(AT)amsat.org>
Message-ID: <BLU133-W4240B23AD993FA43E3040CA92D0(AT)phx.gbl>
Content-Type: text/plain; charset="Windows-1252"


Don't forget that we had perfectly functional SSTV software 10 years ago with
JVFAX, which didn't even use a sound card.  Just a 1-bit interface - an opamp
tied to the control lines of a serial port on an 8 mHz 286 PC running MS-DOS.
Scottie-1 on 20 meters, yeah!  It didn't decode Robot-36, but I figured out
that I could receive the SSTV pictures from MIR by using one of the B&W modes.

Greg  KO6TH


----------------------------------------
> From: simon(AT)hb9drv.ch
> To: cptcurt(AT)flash.net; amsat-bb(AT)amsat.org
> Date: Fri, 17 Oct 2008 15:20:33 +0200
> Subject: [amsat-bb] Re: SSTV Algorithms?
>
> Hi,
>
> Briefly - the SSTV developers have their own algorithms more-or-less, what
> we are mostly interested in is the frequency at a point in time. Simplifying
> things further - we need to know frequency for each point in the line, the
> filtering we use to pre-process the incoming signal removes noise etc. After
> all - it's an analogue specification.
>
> There would be no advantage to sampling at 48kHz instead of 8kHz, in fact it
> would use a lot more CPU to run the filters.
>
> The filtering we use is very standard stuff, SSTV is a nice and simple
> concept, the big problem is combating noise, fading and multi-path
> interference.
>
> Simon Brown, HB9DRV
> www.ham-radio-deluxe.com
>
> ----- Original Message -----
> From: "Curt Nixon"
>>
>> I wasn't so interested in the actual SSTV algorithms as I was in seeing
>> if there is any visible difference in the result of different algorithm
>> use--or is everyone using the same decoding kernel?
>>
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. 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

_________________________________________________________________
When your life is on the go?take your life with you.
http://clk.atdmt.com/MRT/go/115298558/direct/01/


------------------------------

Message: 15
Date: Sat, 18 Oct 2008 08:47:59 +0100
From: Clive Wallis <clivew(AT)zetnet.co.uk>
Subject: [amsat-bb]  Delfi-c3 Telemetry Capture & Decoding
To: amsat-bb(AT)amsat.org
Message-ID: <313030303137323748F9A2BF81(AT)zetnet.co.uk>

Hi,

I am trying to get some telemetry from DO-64 while it is in this mode.
Unfortunately I missed the the initial period of TLM just after launch,
owing to other problems. By the time I had solved these, DO-64 had
switched into transponder mode!

I've managed to get some packets using my hardware PSK decoder (G3RUH)
and PK-88 TNC in KISS mode.  However, I can't find any information about
the format of the data or any telemetry equations. Where are these
details located?

I've had less success with RASCAL.  It appears to be working, and I get
short periods when it locks onto the signal, but no packets received.
The indicated frequency seems to vary widely, and sync is often lost
when a packet is transmitted.

Is the audio clip on the Delfi-C3 website suitable for use as a test
signal?   I have a better sound card, so I may try that.

Any help would be most appreciated.

--
73

	 Clive    G3CWV

Hitchin, North Hertfordshire, UK.


------------------------------

Message: 16
Date: Sat, 18 Oct 2008 09:33:41 +0100
From: "David Barber" <david.barber(AT)dbelectronics.co.uk>
Subject: [amsat-bb]  SSTV Active 08.23utc over UK
To: <amsat-bb(AT)amsat.org>
Message-ID: <1150D0C849EF45D5B549C68251FB23B2(AT)DBXPPPOR>
Content-Type: text/plain;	charset="us-ascii"

Another two superb pictures this morning.

David
G8OQW



------------------------------

Message: 17
Date: Sat, 18 Oct 2008 11:22:04 +0200
From: "Cor" <spacecor(AT)hetnet.nl>
Subject: [amsat-bb]  2  ISS SSTV photo's  at orbit number 56791
To: "AMSAT BB" <amsat-bb(AT)amsat.org>
Message-ID: <00c701c93102$fd6f1160$6401a8c0(AT)HOOFDCOMPUTER>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=response


Hallo All,

Seems that Garriott put back his kenwood VH-C1 unit on the window.
Pics received today 18 Oct.
http://iss.ontwikkel.nl/ISSTV/18Oct2008_0827UTC_ISS_orbit_56791_i.jpg
http://iss.ontwikkel.nl/ISSTV/18Oct2008_0831UTC_ISS_orbit_56791_i.jpg

A request to everyone, please send your received ISS SSTV images to:
http://www.amsat.com/ARISS_SSTV/submit.php

73's Cor PD0RKC



------------------------------

_______________________________________________
Sent via amsat-bb(AT)amsat.org. 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 3, Issue 532
****************************************



Read previous mail | Read next mail


 24.04.2026 22:26:13lGo back Go up