Its a poor question. Both B and C are correct if you make some assumptions that they are talking about a linear satellite. B is what causes C...
E2A08 What is the primary reason for satellite users to limit their transmit ERP? A. For RF exposure safety B. Because the satellite transmitter output power is limited C. To avoid limiting the signal of the other users D. To avoid interfering with terrestrial QSOs
Bob, WB4APR
Agreed. And further, one could even interpret C as the best answer, because, for FM birds, not cranking up your power (thereby limiting access to the satellite by others) prevents the EIRP escalation that we see on the birds at times.
Poorly written question.
Greg KO6TH
----------------------------------------
From: bruninga@usna.edu To: clintbrad4d@earthlink.net; amsat-bb@amsat.org Date: Tue, 12 Feb 2008 18:18:33 -0500 Subject: [amsat-bb] Re: (no subject)
Its a poor question. Both B and C are correct if you make some assumptions that they are talking about a linear satellite. B is what causes C...
E2A08 What is the primary reason for satellite users to limit their transmit ERP? A. For RF exposure safety B. Because the satellite transmitter output power is limited C. To avoid limiting the signal of the other users D. To avoid interfering with terrestrial QSOs
Bob, WB4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
_________________________________________________________________ Climb to the top of the charts! Play the word scramble challenge with star power. http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_jan
In les than an hour...Watch the ATV launch - LIVE
Jules Verne, ESA's first Automated Transfer Vehicle is set for lift- off from Europe's Spaceport in Kourou, French Guiana, at 05:03 CET (04:03 UT), on Sunday 9 March. A test signal will start one hour before liftoff. The launch transmission starts at 04:43 CET (03:43 UT) on 9 March, and will continue for 86 mins after the launch.
http://www.esa.int/SPECIALS/ATV/SEM35OK26DF_0.html
Clint Bradford, K6LCS / KAF3359 909-241-7666
The English RealPlayer feed is about a minute closer to "true" time...the others (for me) are delayed a bit...
Clint Bradford, K6LCS / KAF3359 909-241-7666
On Mar 8, 2008, at 6:56 PM, Clint Bradford wrote:
In les than an hour...Watch the ATV launch - LIVE
Jules Verne, ESA's first Automated Transfer Vehicle is set for lift- off from Europe's Spaceport in Kourou, French Guiana, at 05:03 CET (04:03 UT), on Sunday 9 March. A test signal will start one hour before liftoff. The launch transmission starts at 04:43 CET (03:43 UT) on 9 March, and will continue for 86 mins after the launch.
http://www.esa.int/SPECIALS/ATV/SEM35OK26DF_0.html
Clint Bradford, K6LCS / KAF3359 909-241-7666
It's actually live on NASA TV!
That is a nice development.
Stefan
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Clint Bradford Sent: March-08-08 9:34 PM To: Clint Bradford Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: Watch Space ATV Take Off
The English RealPlayer feed is about a minute closer to "true" time...the others (for me) are delayed a bit...
Clint Bradford, K6LCS / KAF3359 909-241-7666
On Mar 8, 2008, at 6:56 PM, Clint Bradford wrote:
In les than an hour...Watch the ATV launch - LIVE
Jules Verne, ESA's first Automated Transfer Vehicle is set for lift- off from Europe's Spaceport in Kourou, French Guiana, at 05:03 CET (04:03 UT), on Sunday 9 March. A test signal will start one hour before liftoff. The launch transmission starts at 04:43 CET (03:43 UT) on 9 March, and will continue for 86 mins after the launch.
http://www.esa.int/SPECIALS/ATV/SEM35OK26DF_0.html
Clint Bradford, K6LCS / KAF3359 909-241-7666
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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
Patrick - I am sorry I missed tallking to you today on AO-51...How did it go?
I got home about 1AM last night from a visit to the hospital emergency room. I am now on crutches for a couple days...
Here's what happened. This my story, and I'm stickin' to it.
My dear wife, Karen, is at a meeting. I'm home. She has me so well trained that instead of placing my cold drink glass on the front room table and possible causing a condensation mark/ring on the wood, I put the drink on the floor. I mean, no one's home, and the cat's already asleep (and he isn't into Diet Coke) - this is a reasonable act, right?
Phone rings, I get up and answer it. I return to the front room, and immediately step on the glass. A 1/2-inch wide shard jams itself a little over 3/4" into the middle of my right foot...
Couldn't feel much dumber. I called the 24-hour nurse at Blue Cross - a pleasant woman with a wonderful Georgian dialect (the state of Georgia - not from Turkey/Iran/Russia). After describing the "incident" and the fact that it was a little over her breakpoint of "1/4" wide and 1/4" deep" she concludes: "Oh, hon, you need to go to the emergency room NOW..."
So, that's it. Nothing flashy. Nothing glamourous. I stayed up all night with my leg elevated, then slept during your AO-51 passes.
Clint Bradford, K6LCS / KAF3359 909-241-7666
Hi Clint!
Patrick - I am sorry I missed tallking to you today on AO-51...How did it go?
The hamfest was well-attended, and contacts were made on all 3 AO-51 passes. No Hawaii stations, but Dale KL7XJ in Alaska was on the last pass (1700 UTC), a very shallow pass for my location. Thanks Dale, for getting up on an early (for you) cold Saturday morning. The crowd enjoyed hearing Alaska on the satellite.
It was very crowded on the first pass, around 1342 UTC. A typical pass covering all of the continental USA. The next pass at 1519 UTC was the very high pass for the hamfest site, busy like the earlier pass and a good show. Some of my Mexican ham friends showed up from Baja California (Manuel XE2BHL from Tijuana/DM12, and both David XE2RDA and Enrique XE2SER from DL44 in southern Baja California) near the end of that pass. And, as I mentioned, Dale KL7XJ and a few others on the west coast were present for the 1700 UTC pass. Without the increased power from AO-51, I would not have even attempted that pass (maximum 5 degrees elevation to the northwest). I still have to replay my recordings from those passes to make my log entries, so I can't make a more-complete listing of stations I worked this morning.
With great weather, the Scottsdale Amateur Radio Club hamfest had great turnout - buyers and sellers. There was constant activity around the AMSAT table. Several regulars on the FM birds from outside of the Phoenix area stopped by (Leo W7JPI, Larry WA6DIR, Jeff K7WIN, Bill K7WJS) and a couple of relatively new satellite ops from this area (Bill AA4Q and Bob W0DXZ). Brock W6GMT, who was at this hamfest last year, checked in during one of the AO-51 passes from somewhere in DM15 (the Mojave Desert, maybe?).
Working with me at the AMSAT table were Larry W7LB from Tucson and Gerry VE4GTB/KD7MDB, who avoids the Winnipeg winters by staying down here in the Phoenix area - thanks guys for making the morning a fun time. Thanks to all who called me, or tried to call me, during those 3 AO-51 passes today.
73!
Patrick WD9EWK/VA7EWK - Phoenix AZ http://www.wd9ewk.net/
Patrick STODDARD (WD9EWK/VA7EWK) wrote:
Hi Clint!
Patrick - I am sorry I missed tallking to you today on AO-51...How did it go?
The hamfest was well-attended, and contacts were made on all 3 AO-51 passes. No Hawaii stations, but Dale KL7XJ in Alaska was on the last pass (1700 UTC), a very shallow pass for my location. Thanks Dale, for getting up on an early (for you) cold Saturday morning. The crowd enjoyed hearing Alaska on the satellite.
It was very crowded on the first pass, around 1342 UTC. A typical pass covering all of the continental USA. The next pass at 1519 UTC was the very high pass for the hamfest site, busy like the earlier pass and a good show. Some of my Mexican ham friends showed up from Baja California (Manuel XE2BHL from Tijuana/DM12, and both David XE2RDA and Enrique XE2SER from DL44 in southern Baja California) near the end of that pass. And, as I mentioned, Dale KL7XJ and a few others on the west coast were present for the 1700 UTC pass. Without the increased power from AO-51, I would not have even attempted that pass (maximum 5 degrees elevation to the northwest). I still have to replay my recordings from those passes to make my log entries, so I can't make a more-complete listing of stations I worked this morning.
With great weather, the Scottsdale Amateur Radio Club hamfest had great turnout - buyers and sellers. There was constant activity around the AMSAT table. Several regulars on the FM birds from outside of the Phoenix area stopped by (Leo W7JPI, Larry WA6DIR, Jeff K7WIN, Bill K7WJS) and a couple of relatively new satellite ops from this area (Bill AA4Q and Bob W0DXZ). Brock W6GMT, who was at this hamfest last year, checked in during one of the AO-51 passes from somewhere in DM15 (the Mojave Desert, maybe?).
Working with me at the AMSAT table were Larry W7LB from Tucson and Gerry VE4GTB/KD7MDB, who avoids the Winnipeg winters by staying down here in the Phoenix area - thanks guys for making the morning a fun time. Thanks to all who called me, or tried to call me, during those 3 AO-51 passes today.
73!
Patrick WD9EWK/VA7EWK - Phoenix AZ http://www.wd9ewk.net/ _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
Patrick, I was glad to help out with your demo. I was doing other things and missed the first two passes. You had a great signal into the satellite. Were you able to hear KL7DR and KL4E? I know they were both going to try.
73, Dale - KL7XJ
Hi Dale!
I was glad to help out with your demo. I was doing other things and missed the first two passes. You had a great signal into the satellite.
I was hoping there might be a chance to hear you guys on the 1520 UTC pass, but I knew that would almost certainly be too early (0620 Alaska time).
Were you able to hear KL7DR and KL4E? I know they were both going to try.
Unfortunately you were the only one from Alaska I heard. I was hearing voices for a minute or so before I called you, but the satellite was still around 1-2 degrees elevation. When I called you and you responded, I had about 3 minutes or so of audio that all could hear clearly despite the static on the low pass.
Thanks again for coming up on that pass. I need to return the favor more often, if you or your Alaskan friends do presentations or demonstrations where the satellite footprint covers down to Arizona.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/
Yep, we just watched it live out here on the Sea Launch Commander, on our way to loft DirecTV-11 on March 17th. Congrats to our friends at Arianespace! BIG honkin' payload! 73 Jim KQ6EA
--- Clint Bradford clintbrad4d@earthlink.net wrote:
In les than an hour...Watch the ATV launch - LIVE
Jules Verne, ESA's first Automated Transfer Vehicle is set for lift- off from Europe's Spaceport in Kourou, French Guiana, at 05:03 CET (04:03 UT), on Sunday 9 March. A test signal will start one hour before liftoff. The launch transmission starts at 04:43 CET (03:43 UT) on 9 March, and will continue for 86 mins after the launch.
http://www.esa.int/SPECIALS/ATV/SEM35OK26DF_0.html
Clint Bradford, K6LCS / KAF3359 909-241-7666
Sent via AMSAT-BB@amsat.org. 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
participants (7)
-
Bob Bruninga -
Clint Bradford -
Dale-KL7XJ -
Greg D. -
Jim Jerzycke -
Patrick STODDARD (WD9EWK/VA7EWK) -
Stefan Wagener