One thing is certain, P3E will provide a real world test of S-band down link capability. It will then be perfectly clear if the decision to delete it from the Eagle was a wise choice.
Mike K9QHO AMSAT 33589
----- Original Message ----- From: "WILLIAMS MICHAEL" [email protected] To: [email protected] Sent: Friday, September 08, 2006 2:13 AM Subject: [amsat-bb] S-Band Down Link P3E/Eagle
One thing is certain, P3E will provide a real world test of S-band down
link capability. It will then be perfectly clear if the decision to delete it from the Eagle was a wise choice.
Mike K9QHO AMSAT 33589
Hi Mike, K9QHO
The real world test of the S-band downlink capability has been already made using AO40 and by my personal experience I would like to add to it the S-band downlink of OSCAR-13 and this is why the S-band downlink will be used again for P3E
73" de
i8CVS Domenico
Mode S worked nicely for me on AO-13, but by the time AO-40 was in orbit, I had S9 interference that appeared at random times for several hours at a time.
73,
John KD6OZH
----- Original Message ----- From: "i8cvs" [email protected] To: "WILLIAMS MICHAEL" [email protected]; "AMSAT-BB" [email protected] Sent: Friday, September 08, 2006 02:56 UTC Subject: [amsat-bb] Re: S-Band Down Link P3E/Eagle
----- Original Message ----- From: "WILLIAMS MICHAEL" [email protected] To: [email protected] Sent: Friday, September 08, 2006 2:13 AM Subject: [amsat-bb] S-Band Down Link P3E/Eagle
One thing is certain, P3E will provide a real world test of S-band down
link capability. It will then be perfectly clear if the decision to delete it from the Eagle was a wise choice.
Mike K9QHO AMSAT 33589
Hi Mike, K9QHO
The real world test of the S-band downlink capability has been already
made
using AO40 and by my personal experience I would like to add to it the S-band downlink of OSCAR-13 and this is why the S-band downlink will be used again for P3E
73" de
i8CVS Domenico
Sent via [email protected]. 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
2.4 GHZ is an RF waste land.. It is a garbage dump for any and all part 15 and 802.11 consumer stuff. I enjoyed working AO-40 SSB with great signals. It was NOT a CW only bird as some with less than adequate 2.4 GHZ receive setups claim. BUT, the last few months on AO-40 were troublesome.... Normal noise levels of S5 turned into 20 and 30 DB over 9. It was traced to 2.4 GHZ internet provider 10 miles away, YES 10 miles away. It was also traced to a government training center only 3 miles away. Most likely WI-FI. Please give up on the 2.4 GHZ dumping ground. Please join with me and be excited about abandoning it and moving on to greener pastures. Thanks Rick K9KK
.----- Original Message ----- From: "John B. Stephensen" [email protected] To: "i8cvs" [email protected]; "WILLIAMS MICHAEL" [email protected]; "AMSAT-BB" <> Sent: Friday, September 08, 2006 9:00 AM Subject: [amsat-bb] Re: S-Band Down Link P3E/Eagle
Mode S worked nicely for me on AO-13, but by the time AO-40 was in orbit, I had S9 interference that appeared at random times for several hours at a time.
73,
John KD6OZH
----- Original Message ----- From: "i8cvs" [email protected] To: "WILLIAMS MICHAEL" [email protected]; "AMSAT-BB" [email protected] Sent: Friday, September 08, 2006 02:56 UTC Subject: [amsat-bb] Re: S-Band Down Link P3E/Eagle
----- Original Message ----- From: "WILLIAMS MICHAEL" [email protected] To: [email protected] Sent: Friday, September 08, 2006 2:13 AM Subject: [amsat-bb] S-Band Down Link P3E/Eagle
One thing is certain, P3E will provide a real world test of S-band down
link capability. It will then be perfectly clear if the decision to delete it from the Eagle was a wise choice.
Mike K9QHO AMSAT 33589
Hi Mike, K9QHO
The real world test of the S-band downlink capability has been already
made
using AO40 and by my personal experience I would like to add to it the S-band downlink of OSCAR-13 and this is why the S-band downlink will be used again for P3E
73" de
i8CVS Domenico
Sent via [email protected]. 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 [email protected]. 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
Is that condition true for all hams? I think not. If 50 percent of all hams could work S band 50 percent of the time I would call that a great success. When S band didn't work try U/V or is it to be V/U?
The HT sat users can use LEOs and try a HEO at close range. Tracking ground stations I think would prefer a good HEO that came into their view once a day or even once every other day or two. I don't know about you but I do not have the time to be on the air all the time. Even one good pass for me on a HEO once a week would be a joy to use.
For example lets say that P3E gives me one good pass on Friday evening, my time. Then if the planners are smart they will make Eagle give me at least one good pass on Sat or Sunday. Then if and when we get a 3rd HEO up that one should give me a good pass on perhaps Wed? Get the idea. Stagger the openings for the users. We don't need a sat visible everyday when we only have one or two HEOs in orbit. Don't compromise. Make the sats user friendly to the max number of users, ... and then start to experiment with pushing the frontiers to new bands. Can that idea be done?
Les W4SCO
At 07:31 PM 9/8/2006, you wrote:
2.4 GHZ is an RF waste land.. It is a garbage dump for any and all part 15 and 802.11 consumer stuff. I enjoyed working AO-40 SSB with great signals. It was NOT a CW only bird as some with less than adequate 2.4 GHZ receive setups claim. BUT, the last few months on AO-40 were troublesome.... Normal noise levels of S5 turned into 20 and 30 DB over 9. It was traced to 2.4 GHZ internet provider 10 miles away, YES 10 miles away. It was also traced to a government training center only 3 miles away. Most likely WI-FI. Please give up on the 2.4 GHZ dumping ground. Please join with me and be excited about abandoning it and moving on to greener pastures. Thanks Rick K9KK
Given that we can only fit two transponders, shouldn't we pick two sets of frequencies that work at the highest number of locations?
73,
John KD6OZH
----- Original Message ----- From: [email protected] To: [email protected] Sent: Saturday, September 09, 2006 04:51 UTC Subject: [amsat-bb] Re: 2.4 GHZ Garbage Dump
Is that condition true for all hams? I think not. If 50 percent of all hams could work S band 50 percent of the time I would call that a great success. When S band didn't work try U/V or is it to be V/U?
The HT sat users can use LEOs and try a HEO at close range. Tracking ground stations I think would prefer a good HEO that came into their view once a day or even once every other day or two. I don't know about you but I do not have the time to be on the air all the time. Even one good pass for me on a HEO once a week would be a joy to use.
For example lets say that P3E gives me one good pass on Friday evening, my time. Then if the planners are smart they will make Eagle give me at least one good pass on Sat or Sunday. Then if and when we get a 3rd HEO up that one should give me a good pass on perhaps Wed? Get the idea. Stagger the openings for the users. We don't need a sat visible everyday when we only have one or two HEOs in orbit. Don't compromise. Make the sats user friendly to the max number of users, ... and then start to experiment with pushing the frontiers to new bands. Can that idea be done?
Les W4SCO
At 07:31 PM 9/8/2006, you wrote:
2.4 GHZ is an RF waste land.. It is a garbage dump for any and all part 15 and 802.11 consumer stuff. I enjoyed working AO-40 SSB with great signals. It was NOT a CW only bird as some with less than adequate 2.4 GHZ receive setups claim. BUT, the last few months on AO-40 were troublesome.... Normal noise levels of S5 turned into 20 and 30 DB over 9. It was traced to 2.4 GHZ internet provider 10 miles away, YES 10 miles
away.
It was also traced to a government training center only 3 miles away. Most likely WI-FI. Please give up on the 2.4 GHZ dumping ground. Please join with me and be excited about abandoning it and moving on to greener pastures. Thanks Rick K9KK
Sent via [email protected]. 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
Rick Vidmar - K9KK wrote:
Please give up on the 2.4 GHZ dumping ground. Please join with me and be excited about abandoning it and moving on to greener pastures. Thanks Rick K9KK
And then when those "greener pastures" become polluted, what shall we do? Cut our losses and run? And again after that? I'm fairly new to the satellite game and even though I never got to enjoy AO-40, I got some S-band equipment for AO-51 as well as anticipation of future use. Seems to me instead of running away from them every time we need to be using our technical expertise to overcome interference sources on our band allocations. I don't have the equipment to make any kind of test so I'll have to take the design team's word that S band will be unusable but this business of just running away all the time makes me sick to my stomach. I do appreciate the effort of the volunteers though and I'm sure they don't get thanks often enough so once again, thanks gents, I think it is appreciated by most of us even if it doesn't always seem like it. Michael, W4HIJ AMSAT #36017
participants (6)
-
i8cvs -
John B. Stephensen -
Michael Tondee -
Rick Vidmar - K9KK -
sco＠sco-inc.com -
WILLIAMS MICHAEL