AMSAT-BB March 2010

179 participants
280 discussions

Call for Papers--2007 ARRL/TAPR Digital Communications Conference

by Ford, Steve, WB8IMY

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

9 years, 11 months

Re: EggBeater

by Bill Dzurilla

Steve, I have both a commercial and a homebrew Eggbeater and am disappointed with both, especially in light of its rather high price. Connected to my IC-7000 via an ARR mast-mounted preamp, performance is far less than with an HT and an Arrow. Guess an omni can't cut it, at least not from my QTH. Maybe if I could get it up higher, clear of all roofs, it would do better. I can make contacts at relatively high sat elevations, but can do just as well with a $10 dual band ground plane. My friend has an Eggbeater and the same preamp at a clearer QTH, and he hears substantially better, down to 10 degrees elevation in some directions. Good luck and 73, Bill NZ5N > > Hi Steve, > > > > It is surprising to read that you are not hearing > anything. I have > > repeatedly used a 2m and 70cm Eggbeater for the sats > and have had no > > problem hearing things. No pre-amp. > > > > I was using a short cable (e.g. less than 10 meters). > The rigs I > > used were a FT-736r (deaf) and a FT-847 (so-so). > > > > 73, > > > > Dave

10 years

FW: Re: The Moon is our Future

by Dave

We have met the enemy and they are us. WE need to do something. Yes, $15m is outta reach, but isn't there a cash prize for the first on-commercial moon landing? Dave DM78qd // KA0SWT If it weren't for Philo T. Farnsworth, inventor of television, we'd still be eating frozen radio dinners.-- Johnny Carson +++++++++++++++++++++++++++++++++++++ -----Original Message----- From: amsat-bb-bounces(a)amsat.org [mailto:[email protected]] On Behalf Of Jeff Davis Sent: Thursday, July 02, 2009 9:35 AM To: amsat-bb(a)amsat.org Subject: [amsat-bb] Re: The Moon is our Future On Thu, Jul 02, 2009 at 06:48:51AM -0600, Jack K. wrote: > communications anyway) and move forward... We can put up all the leos > we want, but until someone makes something like B. Bruninga's cell > concept work, we are only going to have more of the same, We don't > need more of the same! I couldn't agree more - we don't need more of the same. If I want to sit back and have a two hour rag-chew with someone on the other side of the planet I will use Skype or my cell phone! Dreaming about what *might* be in space is a fun exercise. Actually doing something about it requires sending things to LEO because reality has dictated that's as far as we can afford to go. How's about we use some of that frustrated *imagineering* to come up with interesting new concepts at LEO? We don't need any more FM repeaters buzzing overhead, but what about more cameras downloading HD images, scientific payloads that monitor the ongoing climate change, payloads to study the Earth's magnetic field, etc. etc. Our own 'Twitter' messaging network from space...? The Apollo 13 creed of "failure is not an option" has completely infected the brains at AMSAT and this list. You want something at HEO or on the moon, cut a check for $15 million dollars and let's get on with it. Been waiting since 1996 for another AO-13 and I am getting too old to keep waiting. AMSAT is becoming completely irrelevant as it strives without success for the impossible mission and exhibits a shocking amount of leadership malfesance as it stubbornly refuses to recognize and adapt to realities in the launch business. I know, I know maybe NEXT year someone rich will die and leave us a boatload of cash. Or the bankrupt US government will suddenly cough up a billion dollars for some orbiting emergency communication system. In the meantime we have to stifle the truth because it might blow yet another *secret* deal that's in the works and *almost* a done deal, so let's not complain publicly and ruin it. Heard the stories, heard the lies, got all the t-shirts and ball caps. Whatever. -- Jeff, KE9V AMSAT-NA member since 1994, Skeptic that we will ever go back to HEO since 2002 _______________________________________________ Sent via AMSAT-BB(a)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

11 years, 3 months

Delfi-C3 Close approach warning

by wouter weggelaar

Hi All, While Delfi-C3 is rapidly approaching her second birthday on 28th of April, the team got a warning from The United States Joint Space Operations Center about a close approach of COSMOS debris and Delfi-C3. Today at 14:49 UTC the two objects will approach each other almost heads on with a difference velocity of 15km/s (yes, kilometers a second!). Fortunately, the predicted distance between the objects will be 492m, so they will miss each other. Although these close approach warnings were given to other satellites as well, and the chance that something really happens is very small, we would like to encourage people to listen for Delfi-C3 and send in telemetry. Please have a look at the mission operations page at http://www.delfic3.nl/index.php?option=com_content&task=view&id=93&Itemid=1… for frequency info and the latest RASCAL downoad. **PLEASE NOTE** Due to Delfi-C3s habit of sometimes switching off from science mode, you might hear nothing while Delfi-C3 is fine. Don't panic! but please do listen the orbits after and post your findings on http://oscar.dcarr.org Thanks on behalf of the Delfi-C3 team, Wouter Weggelaar PA3WEG Delfi-C3 Mission Operations

12 years, 2 months

New APRS Rocket Antenna concept needed

by Robert Bruninga

I need someone interested in adding quadrature 2 meter antennas to the outside of a 10" diameter sounding rocket by middle May... This launch is going to space (100 miles up) from White Sands on a sounding rocket to then come back down by parachute. Antennas cannot stick out far (maybe an inch?) but can be bent back along the surface. Temperatures will approach 800F during the 10 minute flight. G' forces will be huge. The payload will be (what else) an APRS trackign system and 2-way APRS communications transponder. So, if anyone wants to take on this antenna, lemme know. All I need is the detail design and analysis. The machining is paid-for. Oh, it also needs quadrature GPS antennas, but that can just be a pair of 1.5" monopoles... Bob, WB4APR

12 years, 2 months

Real-time satellite QSO maps

by Gabriel - EA6VQ

Just a quick note to let you know that DX-Sherlock now provides satellite-specific real-time maps and QSO lists. Have a look at http://www.vhfdx.info/spots/map.php?Frec=SAT <http://www.vhfdx.info/spots/map.php?Frec=SAT&Map=W2L> &Map=W2L I hope you like it. 73. Gabriel - EA6VQ

12 years, 2 months

Today's Pass Schedule for AA5UK/KH6 BL02ic

by Adrian Engele

Greetings all, The AO7 pass this morning was very difficult. I am experiencing locally heavy QRN on 2m. I had one email from an XE station that suggested troposcatter could have been affecting my receive as there was 2m propagation from HI to Baja at the time. Very possible. At the low angles that I am working, it would not surprise me. Any other theories? I was on several other passes FO-29 and VU-52 passes this AM and only worked a couple of stations. I heard one W6 station this morning's pass I had a rough time copying you. Drop me a note if you get this email. Sure wish to see more activity on the linear satellites. Here is what I plan for this afternoon (HI): 4/1/2010: FO-29 @ 03:34 UTC FO-29 @ 05:16 UTC I can only work AOS to TCA then I have building blockage. VU-52 @ 06:50 UTC FO-29 @ 07:02 UTC. I am still looking for JA's. I know some of you are still at work but please spread the word locally to others who can be on the air from JA. The opportunity to work KH6 is getting very small. No plans for SO-50 or AO-27 at this time as the schedule is not ideal and there are local KH6 stations that can provide contacts on those satellites as previously indicated. HO-68 19:28 UTC SSB (center of band SSB only) I will make an effort to get on. Hopefully no gremlins this time. 4/3/2010: Full schedule to be announced. I know many are chomping at the bit for HO-68 on FM and it looks like this will be my last opportunity to work this mode. Will try to make it. Again wind and weather conditions permitting: HO-68 18:55 UTC. All for now. I am going sightseeing and work on grabbing some vacation time. Aloha, 73 Adrian AA5UK/KH6

12 years, 2 months

AO-51 S band today

by Andrew Glasbrenner

The S downlink may be off for a few minutes today, 3/31 around 2200 to 2210Z for telemetry collection on 435.150. 73, Drew KO4MA AMSAT-NA VP Ops

12 years, 2 months

Correction

by Martha

Please note that in my announcement for matching funds, I referred to the Dayton Amateur Radio Club. It is the Dayton Amateur Radio Association -- 73- Martha

12 years, 2 months

FUNcube at UKSC 2010

by Trevor .

AMSAT-UK, who are building the FUNcube satellite, attended the UK Space Conference last week, see http://www.uk.amsat.org/content/view/711/68/ Videos from the 5 day conference can be seen at http://www.ustream.tv/channel/uksc-2010 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm ----

12 years, 2 months

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AMSAT-BB March 2010