Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&...
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth
Quoting Ross Whenmouth who wrote on Wed 2017-07-19 at 18:01:
On this subject, have any hams tried using the ISS as a passive RF reflector?
I have read somewhere that it has been done on 23 cm or 13 cm (with interesting amounts of Doppler), but I can't find a source on the web right now.
What I can find is http://cqnewsroom.blogspot.nl/2016/06/transatlantic-iss-bounce-reported.html which talks about 2 meter ISS bounce.
Koos van den Hout PE4KH
Yes,
On 2m they have (by accident) and they are.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&... ults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Remember Echo things?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 3:09 AM, Simon Brown wrote:
Yes,
On 2m they have (by accident) and they are.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&... ults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Interesting, How all the articles say it is supposed to be this super bright thing. brighter than anything other than the moon or sun. like -10 mag.
Yet I just checked Heavens above to see if they have it and they do, but they are saying all the passes are near 0 mag + or - a mag, sooo HUH?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 8:54 AM, Joe wrote:
Remember Echo things?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 3:09 AM, Simon Brown wrote:
Yes,
On 2m they have (by accident) and they are.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&...
ults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
The sail hasn't been deployed yet.
On Wed, Jul 19, 2017 at 10:06 AM, Joe [email protected] wrote:
Interesting, How all the articles say it is supposed to be this super bright thing. brighter than anything other than the moon or sun. like -10 mag.
Yet I just checked Heavens above to see if they have it and they do, but they are saying all the passes are near 0 mag + or - a mag, sooo HUH?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 8:54 AM, Joe wrote:
Remember Echo things?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 3:09 AM, Simon Brown wrote:
Yes,
On 2m they have (by accident) and they are.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500
From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+d evelopment+&+res ults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Ahhh IC, does anyone know when that will happen.
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 9:17 AM, Paul Stoetzer wrote:
The sail hasn't been deployed yet.
On Wed, Jul 19, 2017 at 10:06 AM, Joe <[email protected] mailto:[email protected]> wrote:
Interesting, How all the articles say it is supposed to be this super bright thing. brighter than anything other than the moon or sun. like -10 mag. Yet I just checked Heavens above to see if they have it and they do, but they are saying all the passes are near 0 mag + or - a mag, sooo HUH? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 8:54 AM, Joe wrote: Remember Echo things? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 3:09 AM, Simon Brown wrote: Yes, On 2m they have (by accident) and they are. Simon Brown, G4ELI www.sdr-radio.com <http://www.sdr-radio.com> -----Original Message----- From: AMSAT-BB [mailto:[email protected] <mailto:[email protected]>] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] <mailto:[email protected]> Subject: Re: [amsat-bb] Russian Thing Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe<[email protected] <mailto:[email protected]>> Now for a surface to be reflective, how big does it need to be in terms of wvelength? That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&+res <http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&+res> ults.jpg Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX. On this subject, have any hams tried using the ISS as a passive RF reflector? 73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected] <mailto:[email protected]>. 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://www.amsat.org/mailman/listinfo/amsat-bb <http://www.amsat.org/mailman/listinfo/amsat-bb> _______________________________________________ Sent via [email protected] <mailto:[email protected]>. 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://www.amsat.org/mailman/listinfo/amsat-bb <http://www.amsat.org/mailman/listinfo/amsat-bb> _______________________________________________ Sent via [email protected] <mailto:[email protected]>. 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://www.amsat.org/mailman/listinfo/amsat-bb <http://www.amsat.org/mailman/listinfo/amsat-bb> _______________________________________________ Sent via [email protected] <mailto:[email protected]>. 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://www.amsat.org/mailman/listinfo/amsat-bb <http://www.amsat.org/mailman/listinfo/amsat-bb>
Paul,
Thanks for the update. Without the sail deployed the 10cm x 10cm x 10cm satellite's luminance is still very low. It should be much more interesting when the 170 sq ft sail is deployed. This sail is still smaller than the ISS solar panels.
I will be in up state New Hampshire during the first week of August. I hope the sail is deployed and I see a light show.
When I return to my FN20 QTH, I hope to try meteor scatter techniques to make a QSO off the sail. I'm sure many others will try as well. Scatter QSOs off the ISS are rare.
73 - Paul - W2HRO
On Wed, Jul 19, 2017 at 10:17 AM, Paul Stoetzer [email protected] wrote:
The sail hasn't been deployed yet.
On Wed, Jul 19, 2017 at 10:06 AM, Joe [email protected] wrote:
Interesting, How all the articles say it is supposed to be this super bright thing. brighter than anything other than the moon or sun. like -10 mag.
Yet I just checked Heavens above to see if they have it and they do, but they are saying all the passes are near 0 mag + or - a mag, sooo HUH?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 8:54 AM, Joe wrote:
Remember Echo things?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/19/2017 3:09 AM, Simon Brown wrote:
Yes,
On 2m they have (by accident) and they are.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: 19 July 2017 07:02 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500
From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+d evelopment+&+res ults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Easy to test. Just pick a UHF TV station that is hudreds of miles ffrom you and wait for the ISS to fly through the path between you.
BUT! I don't have a clue how you can see the effect with Digital TV??? With analog, the flutter was instantaneous and a direct correspondence to signal strength even if only milliseconds came through. On digital TV, you don't get nuttin until you have had SOLID seconds of unflutter digital signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio? They have a multi thousand watt transmitter aimed at their horizon. Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if there is one) and wait. If the ISS flies through the path of any station anywhere on that channel, you should hear something?
Bob
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: Wednesday, July 19, 2017 2:02 AM To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&... esults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
If one were familiar with the modulation pattern of HDTV, couldn'tone use an SDRplay, or something similar, and a panadapter to look for the signature? It wouldn't be necessary to demodulate the signal in order to determine whether the signal was being reflected. The old technique isn't necessarily dead, but the tools used to apply it have to change.
73,
Mac Cody / AE5PH
On 07/19/2017 07:26 AM, Robert Bruninga wrote:
Easy to test. Just pick a UHF TV station that is hudreds of miles ffrom you and wait for the ISS to fly through the path between you.
BUT! I don't have a clue how you can see the effect with Digital TV??? With analog, the flutter was instantaneous and a direct correspondence to signal strength even if only milliseconds came through. On digital TV, you don't get nuttin until you have had SOLID seconds of unflutter digital signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio? They have a multi thousand watt transmitter aimed at their horizon. Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if there is one) and wait. If the ISS flies through the path of any station anywhere on that channel, you should hear something?
Bob
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ross Whenmouth Sent: Wednesday, July 19, 2017 2:02 AM To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Date: Tue, 18 Jul 2017 11:16:38 -0500 From: Joe[email protected]
Now for a surface to be reflective, how big does it need to be in terms of wvelength?
That's textbook radar theory - see: http://slideplayer.com/slide/3927976/13/images/9/Modelling+development+&... esults.jpg
Provided that you have enough EIRP (EME rig?), I would expect that 6m or 2m would probably be a good choice of band, since shorter wavelengths are more likely to undergo optical scattering, which might not be in the direction of your intended RX.
On this subject, have any hams tried using the ISS as a passive RF reflector?
73 ZL2WRW Ross Whenmouth _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
Bob,
You'll also see reflections from aeroplanes.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Robert Bruninga Sent: 19 July 2017 13:27 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Easy to test. Just pick a UHF TV station that is hudreds of miles ffrom you and wait for the ISS to fly through the path between you.
BUT! I don't have a clue how you can see the effect with Digital TV??? With analog, the flutter was instantaneous and a direct correspondence to signal strength even if only milliseconds came through. On digital TV, you don't get nuttin until you have had SOLID seconds of unflutter digital signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio? They have a multi thousand watt transmitter aimed at their horizon. Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if there is one) and wait. If the ISS flies through the path of any station anywhere on that channel, you should hear something?
Bob
You are correct Simon, Digital TV uses 8VSB coding which does not allow the signal from either side to be moving more that a few miles per hour. So, there is no way to have a Digital TV receiver lock on to a reflection from ISS. Michael KC4ZVA
From: Simon Brown [email protected] To: 'Robert Bruninga' [email protected]; [email protected] Sent: Wednesday, July 19, 2017 2:10 PM Subject: Re: [amsat-bb] Russian Thing
Bob,
You'll also see reflections from aeroplanes.
Simon Brown, G4ELI www.sdr-radio.com
-----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Robert Bruninga Sent: 19 July 2017 13:27 To: [email protected] Subject: Re: [amsat-bb] Russian Thing
Easy to test. Just pick a UHF TV station that is hudreds of miles ffrom you and wait for the ISS to fly through the path between you.
BUT! I don't have a clue how you can see the effect with Digital TV??? With analog, the flutter was instantaneous and a direct correspondence to signal strength even if only milliseconds came through. On digital TV, you don't get nuttin until you have had SOLID seconds of unflutter digital signal.
So I guess that old technique is simply dead.
Maybe do it with FM radio? They have a multi thousand watt transmitter aimed at their horizon. Just choose a station that is 500 miles away...
Better yet, simply tune to a totally clear FM channel in your rural area (if there is one) and wait. If the ISS flies through the path of any station anywhere on that channel, you should hear something?
Bob
_______________________________________________ Sent via [email protected]. 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://www.amsat.org/mailman/listinfo/amsat-bb
participants (9)
-
Joe -
Koos van den Hout -
Mac A. Cody -
mvivona＠yahoo.com -
Paul Andrews -
Paul Stoetzer -
Robert Bruninga -
Ross Whenmouth -
Simon Brown