Even if this PSK/FM design was only in LEO it would be very heavily used I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit. The disadvantage of the L/S in the higher orbit is it will take away the advantage I mentioned about a ready pool of HF PSK operators to immediately use the thing. That would put it back into the realm of a niche hobby for the few.
73 de N5HYP
Tom Schuessler
_____________________________________________________
Message: 5
Date: Thu, 11 Dec 2014 18:45:59 +0000 (UTC)
From: Bob- W7LRD w7lrd@comcast.net
To: Tom Schuessler tjschuessler@verizon.net
Cc: AmsatBB amsat-bb@amsat.org
Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Message-ID:
202739126.1160172.1418323559913.JavaMail.zimbra@comcast.net
Content-Type: text/plain; charset=utf-8
Add to the aforementioned - all in a sat that is in a Molniya type orbit with L & S band capability like AO-40 (sobsob)
73 Bob W7LRD
If you build it, they will come. The only reason there's not any satellite equipment available for L, S, C, X, etc. bands right now is that there's no demand for it. Get a satellite up there and people will figure out how to use it.
If AO-40's two meter transmitter had been functional, only the experimenters would have been exposed to the world of downconverters and dishes. The vast majority would have just stuck with what was familiar - Mode B. Instead, a ton of hams figured out how to put together a good S band receiving system, many using retuned, cheap surplus equipment, and got on AO-40, both U/S and L/S.
73,
Paul, N8HM
On Fri, Dec 12, 2014 at 8:17 AM, Tom Schuessler tjschuessler@verizon.net wrote:
Even if this PSK/FM design was only in LEO it would be very heavily used I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit. The disadvantage of the L/S in the higher orbit is it will take away the advantage I mentioned about a ready pool of HF PSK operators to immediately use the thing. That would put it back into the realm of a niche hobby for the few.
73 de N5HYP
Tom Schuessler
Message: 5
Date: Thu, 11 Dec 2014 18:45:59 +0000 (UTC)
From: Bob- W7LRD w7lrd@comcast.net
To: Tom Schuessler tjschuessler@verizon.net
Cc: AmsatBB amsat-bb@amsat.org
Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Message-ID:
<202739126.1160172.1418323559913.JavaMail.zimbra@comcast.net>Content-Type: text/plain; charset=utf-8
Add to the aforementioned - all in a sat that is in a Molniya type orbit with L & S band capability like AO-40 (sobsob)
73 Bob W7LRD
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Tom mentioned:
Even if this PSK/FM design was only in LEO it would be very heavily used. I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit.
The PSK satellite was part of the presentations during the 2014 AMSAT Symposium in Baltimore.
Page 13 of the proceedings begins an article on a 1.5U cubesat from the US Naval Academy called BRICSat-P. This 1.5U half of a 3U cubesat carries an electric thrust experiment.
The remaining 1.5U of this 3U package contains PSAT. It is a 10 meter SSB uplink using PSK-31 with a downlink on 145.825 MHZ FM. (See page 19 of the 2014 proceedings for a paper on PSAT by Bob Bruninga, WB4APR and Dr. Mirek Kasal, OK2AQK).
-- 73 de JoAnne K9JKM k9jkm@amsat.org AMSAT VP User Services
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Tom Schuessler Sent: Friday, December 12, 2014 7:18 AM To: 'AmsatBB' Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Even if this PSK/FM design was only in LEO it would be very heavily used I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit. The disadvantage of the L/S in the higher orbit is it will take away the advantage I mentioned about a ready pool of HF PSK operators to immediately use the thing. That would put it back into the realm of a niche hobby for the few.
73 de N5HYP
Tom Schuessler
Message: 5
Date: Thu, 11 Dec 2014 18:45:59 +0000 (UTC)
From: Bob- W7LRD w7lrd@comcast.net
To: Tom Schuessler tjschuessler@verizon.net
Cc: AmsatBB amsat-bb@amsat.org
Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Message-ID:
<202739126.1160172.1418323559913.JavaMail.zimbra@comcast.net>Content-Type: text/plain; charset=utf-8
Add to the aforementioned - all in a sat that is in a Molniya type orbit with L & S band capability like AO-40 (sobsob)
73 Bob W7LRD
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
A design for a 10m 29.450 MHz PSK receiver can be seen at
http://amsat-uk.org/info/29-45mhz-receiver-project/
73 Trevor M5AKA
On Friday, 12 December 2014, 14:34, JoAnne K9JKM joanne.k9jkm@gmail.com wrote:
Tom mentioned:
Even if this PSK/FM design was only in LEO it would be very heavily used. I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit.
The PSK satellite was part of the presentations during the 2014 AMSAT Symposium in Baltimore.
Page 13 of the proceedings begins an article on a 1.5U cubesat from the US Naval Academy called BRICSat-P. This 1.5U half of a 3U cubesat carries an electric thrust experiment.
The remaining 1.5U of this 3U package contains PSAT. It is a 10 meter SSB uplink using PSK-31 with a downlink on 145.825 MHZ FM. (See page 19 of the 2014 proceedings for a paper on PSAT by Bob Bruninga, WB4APR and Dr. Mirek Kasal, OK2AQK).
-- 73 de JoAnne K9JKM k9jkm@amsat.org AMSAT VP User Services
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Tom Schuessler Sent: Friday, December 12, 2014 7:18 AM To: 'AmsatBB' Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Even if this PSK/FM design was only in LEO it would be very heavily used I believe but I think there would be limitations to the volume of traffic that it would get at a higher orbit. The disadvantage of the L/S in the higher orbit is it will take away the advantage I mentioned about a ready pool of HF PSK operators to immediately use the thing. That would put it back into the realm of a niche hobby for the few.
73 de N5HYP
Tom Schuessler
Message: 5
Date: Thu, 11 Dec 2014 18:45:59 +0000 (UTC)
From: Bob- W7LRD w7lrd@comcast.net
To: Tom Schuessler tjschuessler@verizon.net
Cc: AmsatBB amsat-bb@amsat.org
Subject: Re: [amsat-bb] Design The Next AMSAT Satellite
Message-ID:
202739126.1160172.1418323559913.JavaMail.zimbra@comcast.net
Content-Type: text/plain; charset=utf-8
Add to the aforementioned - all in a sat that is in a Molniya type orbit with L & S band capability like AO-40 (sobsob)
73 Bob W7LRD
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. 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@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
JoAnne K9JKM -
M5AKA -
Paul Stoetzer -
Tom Schuessler