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CX2SA > SATDIG 26.08.10 08:18l 1024 Lines 34945 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: New Satellite Downlink? (G. Beat)
2. Re: New Satellite Downlink? (Gordon JC Pearce)
3. Re: New Satellite Downlink? (STeve Andre')
4. Re: New Satellite Downlink? (jon)
5. Re: New Satellite Downlink? (Nigel Gunn G8IFF/W8IFF)
6. Re: New Satellite Downlink? (Robert Bruninga)
7. Re: New Satellite Downlink? (Graham Shirville)
8. Re: New Satellite Downlink? (STeve Andre')
9. Re: New Satellite Downlink? (Nigel Gunn G8IFF/W8IFF)
10. Re: New Satellite Downlink? (Nigel Gunn G8IFF/W8IFF)
11. Re: New Satellite Downlink? (Roger Kolakowski)
12. Re: Posting to BB (Gary "Joe" Mayfield)
13. Pakistan flood relief disaster communications (Daniel Schultz)
14. SO-50 (Matt Patterson)
15. Re: New Satellite Downlink? (charlie Cantrill)
----------------------------------------------------------------------
Message: 1
Date: Wed, 25 Aug 2010 20:14:25 +0000 (UTC)
From: "G. Beat" <gregory.beat@xxxxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: amsat-bb@xxxxx.xxx
Message-ID:
<877020105.259226.1282767265082.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxxx
xx.xxx>
Content-Type: text/plain; charset=utf-8
Bob -
Yes, the TRANSIT satellite appears to be designed for a low speed broadcast
style service.
An Internet entry/access page would permit an "ease of UI" for the creation
of the
message to be properly encoded, upilnked and then broadcast on the downlink.
Application would require these characteristics:
1. Content would have to be tolerant of?no more than 2 changes each day, no
stock quotes!?
Electronic equivalent of the old morning and evening newspaper.? What does a
locl nespaper
provide for content that is still relavent or desired?
2. Content woiuld have to be relavant to amatuer radio or educational /
scientific community.
3. Contant needs to be "global" in nature -- regional or country specific
would not appeal to the larger global audience.
4. Should be content that has highest value to?a mobile/portable station
(think of a lone person?in South Pacific - small island or boat: Tom Hanks
in Cast Away ).
What daily "global" content wojuld be most useful for them to know?? Assume
they have the radio to receive and laptop computer.
5. Due to infrequency, data / information has to be "correct the first time"
-- retractions woudl take one or two days (reducing validity of service
content)?
Some content ideas:
a. Daily solar activity/propogation daily bulletins (also sent via ARRL and
Internet accessilble)?useful to amateur DX?community
b. Lunar information for?Tidal predictions
c.?TLE of amatuer radio satellites and ISS
d. Global "short message"/bulletin?to amateur radio community -- beyong ARRL
focus -- more along ITU / global scope
e. Astronomical events of "note" ---?northern and southern hemisphere.?
Plantes visible, rare alignments.
f.? Special events (scientific, radio, etc.) -- hemispheric or very?wide
audience
Greg
w9gb
Message: 11
Date: Wed, 25 Aug 2010 12:27:00 -0400
From: "Robert Bruninga" < bruninga@xxxx.xxx >
Subject: [amsat-bb] ?New Satellite Downlink?
To: < amsat-bb@xxxxx.xxx >
Possible new AMSAT Application?
We may have access to two old TRANSIT navigation satellites with
a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
over in the mid afternoon). ?My problem is, coming up with any
meaningful application to use them for communications that would
capture the interest of students, hams or volunteers in support
of education, public service or emergency comms or just plain
fun... ?
The downlink can be heard on an OMNI antenna (though I would
suggest a 3/4 wave (55") vertical) and could be decoded by a
simple software only application with a sound card. (someone has
to write it)...
The total useful message capability is about 500 bytes
transmitted every 2 minutes (at 50 baud). ?The uplink is very
specialized and can ONLY BE DONE from one (or two) very special
command stations. ?These satellites of course were the original
Navy Navigation satellite system (also called OSCARS) and so the
message would be in-place of the normal navigation data. ?SO in
a sense, this is a downlink BROADCAST application. ?Since ham
radio is two way, I'm stumped for applications.
The total message capability of 500 Bytes can contain one long
ARRL bulletin, or 20 APRS position/status reports, or say 20 or
so APRS text messages, or say 50 "callsign exchanges" or maybe
even 1 thumbnail image... ?but what's the application?
Even if we allow say, INTERNET link to the command station for
"anyone" to contribute to the twice per-day upload, then
everyone's receiver application can receive them... ?For what?
So Im looking for ideas. ?All I can come up with so far is:
1) ARRL Bulletins? (I don't even know how often ARRL sends
bulletins ...)
2) Navy/Army/AF MARS broadcast bulletins ...
3) Internet message in-to-command-upload-to message RF downlink.
Two stations do this to each other and it counts as a two-way
QSO?
4) ...
Every scenario of interest usually begins with the much higher value of
UPLINK from the individual field station, not
downlink.. Hence I am stumped.
HUMMH... Maybe purely educational? ?If the software can run on
any PC with a sound card connected to any scanner... Then every
school can use it as a satellite downlink signal of interest..
What kind of thumbnail image can fit in 500 bytes? ?Send in your
picture and get it downlinked on a given day?
Etc..
Will need a DSP volunteer to write the sound card decoder. ?
Bob, WB4APR
------------------------------
Message: 2
Date: Wed, 25 Aug 2010 22:03:49 +0100
From: Gordon JC Pearce <gordonjcp@xxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: amsat-bb@xxxxx.xxx
Message-ID: <1282770229.10222.34.camel@xxxxxxxxx.xxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
On Wed, 2010-08-25 at 12:27 -0400, Robert Bruninga wrote:
> HUMMH... Maybe purely educational?
Sending ebooks, a few words at a time?
> Will need a DSP volunteer to write the sound card decoder.
I'll bite. Is it currently transmitting? Are there "known good"
recordings of its data?
What would I be looking for, to get the correct pass predictions?
Gordon MM0YEQ
------------------------------
Message: 3
Date: Wed, 25 Aug 2010 17:24:25 -0400
From: "STeve Andre'" <andres@xxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: amsat-bb@xxxxx.xxx
Message-ID: <201008251724.25947.andres@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
On Wednesday 25 August 2010 12:27:00 Robert Bruninga wrote:
> Possible new AMSAT Application?
>
> We may have access to two old TRANSIT navigation satellites with
> a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
> over in the mid afternoon). My problem is, coming up with any
> meaningful application to use them for communications that would
> capture the interest of students, hams or volunteers in support
> of education, public service or emergency comms or just plain
> fun...
>
> The downlink can be heard on an OMNI antenna (though I would
> suggest a 3/4 wave (55") vertical) and could be decoded by a
> simple software only application with a sound card. (someone has
> to write it)...
>
> The total useful message capability is about 500 bytes
> transmitted every 2 minutes (at 50 baud). The uplink is very
> specialized and can ONLY BE DONE from one (or two) very special
> commmand stations. These satellites of course were the original
> Navy Navigation satellite system (also called OSCARS) and so the
> message would be in-place of the normal navigation data. SO in
> a sense, this is a downlink BROADCAST application. Since ham
> radio is two way, I'm stumped for applications.
Well, I'm not sure how many applications there are for this, but it
could be fun to try some stuff.
Way way back hundreds of years ago in the 70's I wrote some code
to take English text and crunch it down and transmit it over a modem.
I won't say the following is reasonable, but at 50 baud the little link
needs all the help it can get. ;-)
A lookup table can be made for about 65,000 of the most commonly
used words plus various technical stuff. A message can then it
converted into a series of 16-bit offsets into the table of words,
taking 2 bytes (octets) per word. Printing out words takes the
stream of data, does a lookup for each 16-bit quantity, prints
that word plus a space, and goes on.
A word like "communications" which is 14 bytes becomes two and
is thus a win, but "a" "I" and the like is a loss. There could be an
escape sequence to provide for the literal transmission of a word
not in the 65,000 lookup table, and one could also be added for
upper casing of the next word, etc.
Doing this, you can transmit 250 words from the lookup table
each minute, fairly faster than squirting out raw ASCII.
Since you'd likely need a decoder no matter what the transmission
is, the 65,000 word table is stored on the client side. Hilarity
will probably ensue when someone doesn't update their table
after a big change, and gets slightly demented messages till
they update their code.
Thinking about what to transmit... Possibly space weather
transmissions? CMEs and such are something that has world
wide impact.
Well, that, or national lottery scores.
--
STeve Andre'
wb8wsf en82
Disease Control Warden
Dept. of Political Science
Michigan State University
A day without Windows is like a day without a nuclear incident.
------------------------------
Message: 4
Date: Wed, 25 Aug 2010 14:31:02 -0700 (PDT)
From: jon <jon@xxxxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: Robert Bruninga <bruninga@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <alpine.DEB.2.00.1008251425110.16440@xxxxxxx.xxx>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Assuming TRANSIT uses an 8-bit byte, then it has the capability of sending
4,000 different messages (one for each bit). Probably would want some
checksum, so the total different messages would be less.
Hmmmm, with 3000+ message choices, there might be some good use.
Regional weather warnings? Status of 3000 different "stations"?
I actually had a TRANSIT receiver several years ago. It would still lock
onto the satellites, but the navigation information is no longer valid.
Bob is right: all it took was simple vertical to receive it.
For folks that don't know, TRANSIT was the one of the first satellite
navigation system. It was a GPS of sorts.
I've done DSP soundcard coding before. Years ago I wrote a DGPS decoder,
so if you need some more coders, I'd be happy to help.
Jon K7PGB
On Wed, 25 Aug 2010, Robert Bruninga wrote:
> Possible new AMSAT Application?
>
> We may have access to two old TRANSIT navigation satellites with
> a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
> over in the mid afternoon). My problem is, coming up with any
> meaningful application to use them for communications that would
> capture the interest of students, hams or volunteers in support
> of education, public service or emergency comms or just plain
> fun...
>
> The downlink can be heard on an OMNI antenna (though I would
> suggest a 3/4 wave (55") vertical) and could be decoded by a
> simple software only application with a sound card. (someone has
> to write it)...
>
> The total useful message capability is about 500 bytes
> transmitted every 2 minutes (at 50 baud). The uplink is very
> specialized and can ONLY BE DONE from one (or two) very special
> commmand stations. These satellites of course were the original
> Navy Navigation satellite system (also called OSCARS) and so the
> message would be in-place of the normal navigation data. SO in
> a sense, this is a downlink BROADCAST application. Since ham
> radio is two way, I'm stumped for applications.
>
> The total message capability of 500 Bytes can contain one long
> ARRL bulletin, or 20 APRS position/status reports, or say 20 or
> so APRS text messages, or say 50 "callsign exchanges" or maybe
> even 1 thumbnail image... but what's the application?
>
> Even if we allow say, INTERNET link to the command station for
> "anyone" to contribute to the twice per-day upload, then
> everyone's receiver application can receive them... For what?
>
> So Im looking for ideas. All I can come up with so far is:
> 1) ARRL Bulletins? (I don't even know how often ARRL sends
> bulletins...)
> 2) Navy/Army/AF MARS broadcast bulletins...
> 3) Internet message in-to-command-upload-to message RF downlink.
> Two stations do this to each other and it counts as a two-way
> QSO?
> 4) ...
>
> Every scenario of interest usually begins with the much higher
> value of UPLINK from the individual field station, not
> downlink.. Hence I am stumped.
>
> HUMMH... Maybe purely educational? If the software can run on
> any PC with a sound card connected to any scanner... Then every
> school can use it as a satellite downlink signal of interest..
> What kind of thumbnail image can fit in 500 bytes? Send in your
> picture and get it downlinked on a given day?
>
> Etc..
>
> Will need a DSP volunteer to write the sound card decoder.
>
> Bob, WB4APR
>
> _______________________________________________
> 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: 5
Date: Wed, 25 Aug 2010 21:39:34 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4C758D96.8070207@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Which two Transit series satellites did you say it might be? There seems a
choice of several.
On 25-Aug-10 16:27, Robert Bruninga wrote:
> Possible new AMSAT Application?
>
> We may have access to two old TRANSIT navigation satellites
------------------------------
Message: 6
Date: Wed, 25 Aug 2010 17:54:10 -0400
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: "'Nigel Gunn G8IFF/W8IFF'" <nigel@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <A71BF5F92F1647048B932AB8BD9C98C4@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
> Which two Transit series satellites did you say it might be?
> There seems a choice of several.
The only two that are working I think. #23 and #25.
They are object numbers. 19070 and 19419
------------------------------
Message: 7
Date: Wed, 25 Aug 2010 22:55:09 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: "STeve Andre'" <andres@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <0ACA2522BFE54C569FE54106E734FAF5@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Steve,
I wonder how that would work with multiple languages:)
73
Graham G3VZV
----- Original Message -----
From: "STeve Andre'" <andres@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, August 25, 2010 10:24 PM
Subject: [amsat-bb] Re: New Satellite Downlink?
> On Wednesday 25 August 2010 12:27:00 Robert Bruninga wrote:
>> Possible new AMSAT Application?
>>
>> We may have access to two old TRANSIT navigation satellites with
>> a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
>> over in the mid afternoon). My problem is, coming up with any
>> meaningful application to use them for communications that would
>> capture the interest of students, hams or volunteers in support
>> of education, public service or emergency comms or just plain
>> fun...
>>
>> The downlink can be heard on an OMNI antenna (though I would
>> suggest a 3/4 wave (55") vertical) and could be decoded by a
>> simple software only application with a sound card. (someone has
>> to write it)...
>>
>> The total useful message capability is about 500 bytes
>> transmitted every 2 minutes (at 50 baud). The uplink is very
>> specialized and can ONLY BE DONE from one (or two) very special
>> commmand stations. These satellites of course were the original
>> Navy Navigation satellite system (also called OSCARS) and so the
>> message would be in-place of the normal navigation data. SO in
>> a sense, this is a downlink BROADCAST application. Since ham
>> radio is two way, I'm stumped for applications.
>
> Well, I'm not sure how many applications there are for this, but it
> could be fun to try some stuff.
>
> Way way back hundreds of years ago in the 70's I wrote some code
> to take English text and crunch it down and transmit it over a modem.
>
> I won't say the following is reasonable, but at 50 baud the little link
> needs all the help it can get. ;-)
>
> A lookup table can be made for about 65,000 of the most commonly
> used words plus various technical stuff. A message can then it
> converted into a series of 16-bit offsets into the table of words,
> taking 2 bytes (octets) per word. Printing out words takes the
> stream of data, does a lookup for each 16-bit quantity, prints
> that word plus a space, and goes on.
>
> A word like "communications" which is 14 bytes becomes two and
> is thus a win, but "a" "I" and the like is a loss. There could be an
> escape sequence to provide for the literal transmission of a word
> not in the 65,000 lookup table, and one could also be added for
> upper casing of the next word, etc.
>
> Doing this, you can transmit 250 words from the lookup table
> each minute, fairly faster than squirting out raw ASCII.
>
> Since you'd likely need a decoder no matter what the transmission
> is, the 65,000 word table is stored on the client side. Hilarity
> will probably ensue when someone doesn't update their table
> after a big change, and gets slightly demented messages till
> they update their code.
>
> Thinking about what to transmit... Possibly space weather
> transmissions? CMEs and such are something that has world
> wide impact.
>
> Well, that, or national lottery scores.
>
>
> --
> STeve Andre'
> wb8wsf en82
> Disease Control Warden
> Dept. of Political Science
> Michigan State University
>
> A day without Windows is like a day without a nuclear incident.
> _______________________________________________
> 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: 8
Date: Wed, 25 Aug 2010 17:58:23 -0400
From: "STeve Andre'" <andres@xxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: amsat-bb@xxxxx.xxx
Message-ID: <201008251758.23659.andres@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Heh. One of the escape sequences could be which language to use,
so with the 16-bit scheme here, you could have 64K possible ones
to choose from. Just have a 65,000 word table for each one.
You'd send out messages one language at a time.
On Wednesday 25 August 2010 17:55:09 Graham Shirville wrote:
> Hi Steve,
>
> I wonder how that would work with multiple languages:)
>
> 73
>
> Graham G3VZV
> ----- Original Message -----
> From: "STeve Andre'" <andres@xxx.xxx>
> To: <amsat-bb@xxxxx.xxx>
> Sent: Wednesday, August 25, 2010 10:24 PM
> Subject: [amsat-bb] Re: New Satellite Downlink?
>
> > On Wednesday 25 August 2010 12:27:00 Robert Bruninga wrote:
> >> Possible new AMSAT Application?
> >>
> >> We may have access to two old TRANSIT navigation satellites with
> >> a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
> >> over in the mid afternoon). My problem is, coming up with any
> >> meaningful application to use them for communications that would
> >> capture the interest of students, hams or volunteers in support
> >> of education, public service or emergency comms or just plain
> >> fun...
> >>
> >> The downlink can be heard on an OMNI antenna (though I would
> >> suggest a 3/4 wave (55") vertical) and could be decoded by a
> >> simple software only application with a sound card. (someone has
> >> to write it)...
> >>
> >> The total useful message capability is about 500 bytes
> >> transmitted every 2 minutes (at 50 baud). The uplink is very
> >> specialized and can ONLY BE DONE from one (or two) very special
> >> commmand stations. These satellites of course were the original
> >> Navy Navigation satellite system (also called OSCARS) and so the
> >> message would be in-place of the normal navigation data. SO in
> >> a sense, this is a downlink BROADCAST application. Since ham
> >> radio is two way, I'm stumped for applications.
> >
> > Well, I'm not sure how many applications there are for this, but it
> > could be fun to try some stuff.
> >
> > Way way back hundreds of years ago in the 70's I wrote some code
> > to take English text and crunch it down and transmit it over a modem.
> >
> > I won't say the following is reasonable, but at 50 baud the little link
> > needs all the help it can get. ;-)
> >
> > A lookup table can be made for about 65,000 of the most commonly
> > used words plus various technical stuff. A message can then it
> > converted into a series of 16-bit offsets into the table of words,
> > taking 2 bytes (octets) per word. Printing out words takes the
> > stream of data, does a lookup for each 16-bit quantity, prints
> > that word plus a space, and goes on.
> >
> > A word like "communications" which is 14 bytes becomes two and
> > is thus a win, but "a" "I" and the like is a loss. There could be an
> > escape sequence to provide for the literal transmission of a word
> > not in the 65,000 lookup table, and one could also be added for
> > upper casing of the next word, etc.
> >
> > Doing this, you can transmit 250 words from the lookup table
> > each minute, fairly faster than squirting out raw ASCII.
> >
> > Since you'd likely need a decoder no matter what the transmission
> > is, the 65,000 word table is stored on the client side. Hilarity
> > will probably ensue when someone doesn't update their table
> > after a big change, and gets slightly demented messages till
> > they update their code.
> >
> > Thinking about what to transmit... Possibly space weather
> > transmissions? CMEs and such are something that has world
> > wide impact.
> >
> > Well, that, or national lottery scores.
> >
> >
> > --
> > STeve Andre'
> > wb8wsf en82
> > Disease Control Warden
> > Dept. of Political Science
> > Michigan State University
> >
> > A day without Windows is like a day without a nuclear incident.
> > _______________________________________________
> > 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
--
STeve Andre'
Disease Control Warden
Dept. of Political Science
Michigan State University
A day without Windows is like a day without a nuclear incident.
------------------------------
Message: 9
Date: Wed, 25 Aug 2010 22:11:58 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4C75952E.5050802@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
That's OSCAR 23 and OSCAR 25.
Arn't they both Korean sats?
On 25-Aug-10 21:54, Robert Bruninga wrote:
>> Which two Transit series satellites did you say it might be?
>> There seems a choice of several.
>
> The only two that are working I think. #23 and #25.
> They are object numbers. 19070 and 19419
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.851 / Virus Database: 271.1.1/3092 - Release Date: 08/24/10
15:31:00
>
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF 9H3GN), e-mail nigel@xxxxx.xxx
www http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP
Club International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN, EAA382.
------------------------------
Message: 10
Date: Wed, 25 Aug 2010 22:25:40 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4C759864.1030502@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
OK. The complete catalogue has 2 of each OSCAR 23 and OSCAR 25.
I need the ones with the 90dgf inclination.
On 25-Aug-10 22:11, Nigel Gunn G8IFF/W8IFF wrote:
> That's OSCAR 23 and OSCAR 25.
> Arn't they both Korean sats?
>
------------------------------
Message: 11
Date: Wed, 25 Aug 2010 19:27:28 -0400
From: Roger Kolakowski <Rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: bruninga@xxxx.xxxx Amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID: <4C75A6E0.2070700@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
With increasing solar activity and "new" awareness of the possible
detrimental effects worldwide of solar storms, combined with the time
delay for a solar event to reach Earth (2-3 days) I believe that a
possible rebroadcast of "Solar Weather" ala WWV style, could be a useful
educational tool as well as a "timely" prognostication for radio
operations around the world.
It would also serve as a "town crier" type service, warning people
worldwide of a potential disruptive event.
The standardized resource could be WWV or any other agency willing to
provide the info on a daily basis.
Solar storm activity reports would not depend on internet access or
shortwave receivers but a common scanner and any computer.
The mission could be re-tasked after the sunspot peak is well passed.
Well...just my first thought... there may be others...
Roger
WA1KAT
Robert Bruninga wrote:
>> Which two Transit series satellites did you say it might be?
>> There seems a choice of several.
>
> The only two that are working I think. #23 and #25.
> They are object numbers. 19070 and 19419
>
> _______________________________________________
> 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: Wed, 25 Aug 2010 18:34:15 -0500
From: "Gary \"Joe\" Mayfield" <gary_mayfield@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Posting to BB
To: "'Tom Jones'" <Tom.Jones@xxxxxx.xxx>, <AMSAT-BB@xxxxx.xxx>
Message-ID: <COL114-DS1997E86A5904E6FEB91ED78A840@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
If you have a parallel port FODTrack is probably the cheapest. I've used it
for quite a while.
73,
Joe kk0sd
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Tom Jones
Sent: Wednesday, August 25, 2010 8:30 AM
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] Posting to BB
Folks
I am searching for hardware to interface my laptop to the Yaesu rotor
G-5500 or G-550. I use SatPC32 software. What is the latest and greatest
hardware to do this? I know that the KCT unit is no longer made.
Regards
Tom
KC2DTQ
_______________________________________________
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: 13
Date: Wed, 25 Aug 2010 23:18:35 -0400
From: "Daniel Schultz" <n8fgv@xxx.xxx>
Subject: [amsat-bb] Pakistan flood relief disaster communications
To: <amsat-bb@xxxxx.xxx>
Message-ID: <052oHZDRj0352S03.1282792715@xxxxx.xxx.xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I am forwarding this from the TAPR mailing list in case any Amsat people can
help with this effort.
Dan Schultz N8FGV
------------------------------------------------------------------------------
--
The TAPR Office received a telephone inquiry today about the use of Packet
Radio for relief efforts in Pakistan.
I asked Jeannie to summarize in an email what kind of information or help
they were seeking
I felt posting to the tapr-announce list would be the easiest way to get
the word out.
Please contact Jeannie directly if you can help.
--
73,
John, W9DDD
--------
To recap, we are interested in HAM radio expertise to help us figure out how
to enable on-the-ground reports communicated through HAM radio to be
compiled into digital maps (e.g., see map created by Ushahidi for Haiti
http://haiti.ushahidi.com/, which we fed SMS and Twitter messages) for use
by relief organizations. This project is within Crisiscommons.org, (
www.crisiscommons.org) and I am the Silicon Valley city lead.
CrisisCommons.org is a volunteer movement of coders for humanitarian relief
in natural disasters, and anyone can jump in and contribute any amount of
effort that they like.
Background information and our current understanding is being recorded at:
http://wiki.crisiscommons.org/wiki/HAM_Radio_to_Digital#Self-Register
Please encourage any interested parties to jump in and edit the page to help
us understand HAM capabilities and technical needs. The goals for defining
requirements is to create an open source software stand-alone or add-on
software to automate collection of HAM-generated information during natural
disasters to a common operating picture.
A team is being sent in for a range of CrisisCommons.org projects; if your
members could help us communicate with the HAM operators in Pakistan, to get
requirements (even by voice), we would love to know more about what they
need and how to help.
A working group will be running in Silicon Valley this Friday from 5-10pm,
and we will have virtual participation. Details at:
http://www.eventbrite.com/myevent?eid=538771480
Please feel free to forward this email or advertise this project to your
members - the more the merrier. We did send this information out to the
contact form for the ARRL.
I look forward to any information that you are able to provide!
Best,
Jeannie
--
Jeannie A. Stamberger, Ph.D.
Adjunct Faculty
Carnegie Mellon Silicon Valley
Disaster Management Initiative
NASA Ames Research Campus
Room 107, Building 23
Moffett Field, California
jeannie.stamberger@xx.xxx.xxx
+1 (650) 380-1158
------------------------------
Message: 14
Date: Wed, 25 Aug 2010 23:09:03 -0500
From: "Matt Patterson" <mattpatt@xxxxxxxx.xxx>
Subject: [amsat-bb] SO-50
To: <amsAT-BB@xxxxx.xxx>
Message-ID: <000501cb44d4$6b70ef30$4252cd90$@xxx>
Content-Type: text/plain; charset="us-ascii"
Was listening for the SO-50 pass @ 22:58Z and didn't hear anything. A check
of the Oscar status website reveals that it was active a couple hours ago.
Did anyone else hear it during the latest pass? I finally got setup to
start recording the birds with my computer and was going to use SO-50 as a
test.
73 Matt
W5LL
------------------------------
Message: 15
Date: Wed, 25 Aug 2010 18:00:35 -0700 (PDT)
From: charlie Cantrill <ki4rdt@xxxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: amsat-bb@xxxxx.xxx
Message-ID: <15454.17534.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Would it be possible to allow students/hams around the world to send a text
message to ground stations? This would be especially handy to those
students/instructors who cannot send APRS packets to sats to generate
interest and outreach. What about adding this feature in addition to sending
bulletins of satellite users interest.
Charlie CantrillKI4RDTInstructor, Nelson County Area Technology Center
Date: Wed, 25 Aug 2010 12:27:00 -0400
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb]? New Satellite Downlink?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <3DEE29EBEB7F407C97AFEA744C8B95D5@xxxxx.xxxx.xxx>
Content-Type: text/plain;??? charset="us-ascii"
Possible new AMSAT Application?
We may have access to two old TRANSIT navigation satellites with
a 50 baud downlink at 149.985 (and 400 MHz). (presently coming
over in the mid afternoon).? My problem is, coming up with any
meaningful application to use them for communications that would
capture the interest of students, hams or volunteers in support
of education, public service or emergency comms or just plain
fun...?
The downlink can be heard on an OMNI antenna (though I would
suggest a 3/4 wave (55") vertical) and could be decoded by a
simple software only application with a sound card. (someone has
to write it)...
The total useful message capability is about 500 bytes
transmitted every 2 minutes (at 50 baud).? The uplink is very
specialized and can ONLY BE DONE from one (or two) very special
commmand stations.? These satellites of course were the original
Navy Navigation satellite system (also called OSCARS) and so the
message would be in-place of the normal navigation data.? SO in
a sense, this is a downlink BROADCAST application.? Since ham
radio is two way, I'm stumped for applications.
The total message capability of 500 Bytes can contain one long
ARRL bulletin, or 20 APRS position/status reports, or say 20 or
so APRS text messages, or say 50 "callsign exchanges" or maybe
even 1 thumbnail image...? but what's the application?
Even if we allow say, INTERNET link to the command station for
"anyone" to contribute to the twice per-day upload, then
everyone's receiver application can receive them...? For what?
So Im looking for ideas.? All I can come up with so far is:
1) ARRL Bulletins? (I don't even know how often ARRL sends
bulletins...)
2) Navy/Army/AF MARS broadcast bulletins...
3) Internet message in-to-command-upload-to message RF downlink.
Two stations do this to each other and it counts as a two-way
QSO?
4) ...
Every scenario of interest usually begins with the much higher
value of UPLINK from the individual field station, not
downlink.. Hence I am stumped.
HUMMH... Maybe purely educational?? If the software can run on
any PC with a sound card connected to any scanner... Then every
school can use it as a satellite downlink signal of interest..
What kind of thumbnail image can fit in 500 bytes?? Send in your
picture and get it downlinked on a given day?
Etc..
Will need a DSP volunteer to write the sound card decoder.?
Bob, WB4APR
------------------------------
_______________________________________________
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 5, Issue 353
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