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CX2SA > SATDIG 06.06.09 02:33l 342 Lines 10240 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: HF satellite? (Simon (HB9DRV))
2. Re: HF satellite? (Bill Ress)
3. K5D DXpedition (K8KFJ@xxx.xxxx
4. Re: HF satellite? (Jeff KB2M)
5. Re: HF satellite? (n3tl@xxxxxxxxx.xxxx
6. Re: HF satellite? (Simon (HB9DRV))
7. Re: HF satellite? (Simon (HB9DRV))
8. Re: HF satellite? (w7lrd@xxxxxxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Fri, 5 Jun 2009 18:16:23 +0200
From: "Simon \(HB9DRV\)" <simon@xxxxxx.xx>
Subject: [amsat-bb] Re: HF satellite?
To: <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <3B9312795E804E7399FBC61225BE8880@xxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi,
Sounds interesting - but PSK-31 and Doppler may be problematic - will this
be a linear transponder or... ?
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
> 2) PSK-31 multi-user SSB uplink on 29 MHz and FM down link on
> 145.825
------------------------------
Message: 2
Date: Fri, 05 Jun 2009 09:25:06 -0700
From: Bill Ress <bill@xxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: HF satellite?
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A2946E2.3080001@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Bob,
Let's go for it. I'm keen on using the unused "exclusive" HF satellite
allocations. I hope many of us will be interested in supporting the concept.
Regards...Bill - N6GHz
Robert Bruninga wrote:
> We are considering an HF transponder for our next long range
> CUBESAT mission planning. It can have three modes:
>
> 1) APRS 1200 baud for command and control and APRS on 145.825
> 2) PSK-31 multi-user SSB uplink on 29 MHz and FM down link on
> 145.825
> 3) 29 MHz uplink and 24 MHz downlink SSB transponder
>
> We will welcome someone in the AMSAT community that wants to
> contribute to mission 3, the HF transponder. We tried the #2
> PSK-31 mission on PCSAT2 and RAFT, both failed due to HF antenna
> deployment problems. Now we are going to try again...
>
> 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: 3
Date: Fri, 5 Jun 2009 12:43:38 EDT
From: K8KFJ@xxx.xxx
Subject: [amsat-bb] K5D DXpedition
To: amsat-bb@xxxxx.xxx
Message-ID: <c5f.53cc4eb5.375aa53a@xxx.xxx>
Content-Type: text/plain; charset="ISO-8859-1"
Can someone please remind me of the name and callsign of the sat op who
operated from Desecheo. Many thanks.
73, Gary -K8KFJ-
West Virginia
Sat VUCC #125
**************Mortgage rates dropped. Record lows. $200,000 for $1,029/mo
Fixed. LendingTree?
(http://pr.atwola.com/promoclk/100126575x1222627882x1201465404/aol?redir=http:
%2F%2Fwww.lendingtree.com%2Fborrower%2Falliance%2Ffrom.a
sp%3Fwhereto%3Dpromopagev3%26promo%3D00279%26loan%5Ftype%3D2%26source%3D2889
570%26esourceid%3D2889570%26800num%3D1%2D800%2D289%2D3915%26AdType%3D2)
------------------------------
Message: 4
Date: Fri, 5 Jun 2009 12:58:54 -0400
From: "Jeff KB2M" <kb2m@xxxxxxx.xxx>
Subject: [amsat-bb] Re: HF satellite?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <004301c9e5fe$e8def6f0$ba9ce4d0$@xxx>
Content-Type: text/plain; charset="US-ASCII"
A group of us tried PSK31 on AO-40. The Doppler was a B***h on 2.4 gig,
but according to my log in October 2001 we managed to make 3 contacts over a
period of 2 days with w2xb, n4zq, and kb3kj. Ah those were the golden days
of HEO sat ops, hopefully to happen again.....
73 Jeff kb2m
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Simon (HB9DRV)
Sent: Friday, June 05, 2009 12:16 PM
To: bruninga@xxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: HF satellite?
Hi,
Sounds interesting - but PSK-31 and Doppler may be problematic - will this
be a linear transponder or... ?
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
> 2) PSK-31 multi-user SSB uplink on 29 MHz and FM down link on
> 145.825
------------------------------
Message: 5
Date: Fri, 05 Jun 2009 17:15:17 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: HF satellite?
To: bruninga@xxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<060520091715.5309.4A2952A5000AB8AE000014BD22216128369B0A02D2089B9A019C0
4040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
I think it's a great idea. I suspect there will, indeed, be some Doppler
challenges.
Although, I wonder.... How would Doppler's impact on PSK-31 be different from,
say, SSTV? I ask because the SSTV schedules on AO-51 have been pleasantly
surprising to me, in terms of the quality of image I was getting.
73 to all,
Tim
-------------- Original message from "Robert Bruninga" <bruninga@xxxx.xxx>: --
------------
> We are considering an HF transponder for our next long range
> CUBESAT mission planning. It can have three modes:
>
> 1) APRS 1200 baud for command and control and APRS on 145.825
> 2) PSK-31 multi-user SSB uplink on 29 MHz and FM down link on
> 145.825
> 3) 29 MHz uplink and 24 MHz downlink SSB transponder
>
> We will welcome someone in the AMSAT community that wants to
> contribute to mission 3, the HF transponder. We tried the #2
> PSK-31 mission on PCSAT2 and RAFT, both failed due to HF antenna
> deployment problems. Now we are going to try again...
>
> 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: 6
Date: Fri, 5 Jun 2009 19:23:16 +0200
From: "Simon \(HB9DRV\)" <simon@xxxxxx.xx>
Subject: [amsat-bb] Re: HF satellite?
To: <n3tl@xxxxxxxxx.xxx>, <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <15491E88AAEA419B95E69E9144DF37A7@xxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Some rough and ready calculations *assuming a LEO* are that PSK needs the TX
frequency adjusting every second or so, certainly over the duration of a
short PSK transmission no Doppler correction on TX at 29MHz will result in
no QSO.
But there's plenty of software which can adjust an HF transmitter so it'll
just be a question of user education. Myself I would probably TX with my
TS-480 and RX with a TS-2000.
PSK-125 may be a better option as it is on 6m when there's an opening (such
as today).
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
----- Original Message -----
From: <n3tl@xxxxxxxxx.xxx>
>I think it's a great idea. I suspect there will, indeed, be some Doppler
>challenges.
>
> Although, I wonder.... How would Doppler's impact on PSK-31 be different
> from, say, SSTV? I ask because the SSTV schedules on AO-51 have been
> pleasantly surprising to me, in terms of the quality of image I was
> getting.
>
------------------------------
Message: 7
Date: Fri, 5 Jun 2009 19:23:53 +0200
From: "Simon \(HB9DRV\)" <simon@xxxxxx.xx>
Subject: [amsat-bb] Re: HF satellite?
To: <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <9026971D880B4492B7E2BC74CAEF6613@xxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Robert - long range = HEO / MEO or long range planning?
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
> We are considering an HF transponder for our next long range
> CUBESAT mission planning. It can have three modes:
------------------------------
Message: 8
Date: Fri, 5 Jun 2009 18:46:25 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Re: HF satellite?
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<1559034038.1054241244227585345.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx
.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
For those who recall back in the day of RS-13 I think, was mode K.? 15M up and
10M down.? It provided some very interesting over the horizon contacts when we
had good sun spots.?
73 Bob W7LRD
----- Original Message -----
From: "Robert Bruninga" <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Sent: Friday, June 5, 2009 9:05:35 AM GMT -08:00 US/Canada Pacific
Subject: [amsat-bb] ?HF satellite?
We are considering an HF transponder for our next long range
CUBESAT mission planning. ?It can have three modes:
1) APRS 1200 baud for command and control and APRS on 145.825
2) PSK-31 multi-user SSB uplink on 29 MHz and FM down link on
145.825
3) 29 MHz uplink and 24 MHz downlink SSB transponder
We will welcome someone in the AMSAT community that wants to
contribute to mission 3, the HF transponder. ?We tried the #2
PSK-31 mission on PCSAT2 and RAFT, both failed due to HF antenna
deployment problems. ?Now we are going to try again...
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
------------------------------
_______________________________________________
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 261
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