September 2006 - Eagle (INACTIVE)

[Fwd: [amsat-bb] Re: S band downlink on P3E]
by Jim Sanford 08 Sep '06

08 Sep '06

Team: The kind of rational technical argument we should be prepared to answer. . . . 73, Jim -------- Original Message -------- Subject: [amsat-bb] Re: S band downlink on P3E Date: Thu, 7 Sep 2006 17:40:39 -0400 From: Jeff Griffin <kb2m(a)comcast.net> Reply-To: Jeff Griffin <kb2m(a)comcast.net> To: <amsat-bb(a)amsat.org> References: <01b401c6d28f$cc51d870$1001a8c0@RAFPavillion> <050e01c6d2ac$e29ff720$6401a8c0@KO4MA> Ok guy's, how about a test ? Why not everyone who is mode L/S capable get on AO-51 between September 11, and September 18th and post all results here? Or have another mode V/S session for the L band challenged? All we need is degree(s) of elevation worked, type of antenna, and rx environment, and quality of rx signal received. This should tell us what we want to know. I don't think there is a problem, as I worked up to 10 stations a pass last mode V/S session , and didn't hear anyone complain.... 73 Jeff kb2m ----- Original Message ----- From: "Andrew Glasbrenner" <glasbrenner(a)mindspring.com> To: "Rick Fletcher" <rfletcher(a)plumdragon.com>; "'AMSAT'" <amsat-bb(a)amsat.org> Sent: Thursday, September 07, 2006 2:38 PM Subject: [amsat-bb] Re: S band downlink on P3E > Rick, > > I am in _TOTAL_ agreement. I live in the suburbs of Tampa/St. Pete and > never > had an interference problem on my 3 foot dish. I have used the same dish > to > log well over a dozen WiFi access points in that immediate neighborhood. > With properly designed equipment, all that trash on 2.4 ghz goes away with > some elevation. What won't work is helixes with multiple sidelobes, and > surplus dishes that let one whole polarity of noise right thru the back. > > Everyone knows I'm a big supporter of AMSAT, but I gotta call it as I see > it. It makes me think of "bait and switch" to collect money for a project > featuring such a popular mode and then drop it. > > The loss of Mode B on AO-40 caused a lot of the hardcore AO-10/AO-13 types > to walk away, and that was tough to overcome. Now that we have, and we > have > people wanting S band, we leave them behind too. Even if it's a sound > engineering decision (and that hasn't been proven to me) it's a horrid > marketing decision. Bad mojo for a organization that lives on the > donations > of it's members. > > Sorry if this causes any pain to those involved with Eagle, but I needed > to > get it off my chest. > > 73, Drew KO4MA > AMSAT LM 2332 > > >>While AO-40 was still alive and I was working it from deep within "Silicon >>Valley", an area blanketed by WiFi, 2.4GHz cordless phones, etc., I >>discovered that a parabolic dish with a properly positioned and designed >>patch feed (slightly under-illuminating the dish and having no significant >>side-lobes) would bring in AO-40's S-band downlink very nicely and >>cleanly. > >>Of course, other feed or antenna types such as helical antennas/feeds were >>useless in that environment. > >>I have to admit that I don't buy the "too noisy" argument. > >>73, > >>Rick >>KG6IAL _______________________________________________ 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

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[Fwd: Re: S band and Eagle: an appeal for a higher level discussion]
by Tom Clark, K3IO 08 Sep '06

08 Sep '06

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Last call for papers - Deadline Approaching
by Emily Clarke 01 Sep '06

01 Sep '06

2006 AMSAT North America Space Symposium 6-8 October 2006, Foster City, California Call for Papers: Final Call http://www.amsat.org/amsat-new/symposium/2006CallForPapers.php Invitation: Speakers are invited to submit and present papers dealing with the science of Amateur Radio Satellites and associated technologies for the AMSAT 2006 Space Symposium. The Symposium will be held at the Crowne Plaza Hotel in Foster City, California approximately 10km south of San Francisco International Airport. This is an annual Symposium, however the 2005 Symposium was cancelled due to hurricane damage caused by hurricanes Katrina and Rita. Speakers originally scheduled for the 2005 Symposium are invited to re-submit papers for the 2006 Symposium. Topics: Recommended topics include but are not limited to the following categories: · AMSAT P3E · AMSAT Eagle · Microsatellite Projects · Cubesat and Nanosatellite Projects · ARISS · Attitude Determination and Control · Propulsion · Communications · Mechanical · Antennas · Groundstations · Digital Modes · Education and Outreach · Launch Opportunities · Status Reports Other Activities: · The AMSAT Board of Directors will meet on 5-6 October. · The AMSAT Annual General Meeting (AGM) will be held on 6 October. · AMSAT International will meet 8 October · The IARU Satellite Committee will meet during the Symposium and will hold a public round table discussion on frequency coordination on 8 October · The ARISS International Delegates Meeting will be held on 9-10 October · "Birds of a Feather" sessions (BOFS) will be available on request Deadline: Applications for papers must be received ASAP. Papers must be submitted no later than 12 September 2006. Procedure: The planning committee has created an online registration system where you can submit your abstract and track it. Using this system you will allow you to submit your paper and any subsequent changes online. Visit the 2006 Symposium Paper Registration webpage for instructions: http://www.amsat.org/amsat-new/symposium/2006PapersProcedure.php Contact Emily Clarke, N1DID for additional information or Jean Fletcher KG6IAK for additional information Venue: See the 2006 Space Symposium web page for additional information about the venue.

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