November 2007 - Eagle (INACTIVE)

THE TALKING DOG
by Dick Jansson-rr 29 Nov '07

29 Nov '07

I'm wondering if we can recruit this dog to help us in the satellite design world. J Dick Jansson, KD1K <mailto:kd1k@amsat.org> kd1k(a)amsat.org <mailto:kd1k@arrl.net> kd1k(a)arrl.net -----Original Message----- While driving around the back woods of East Texas, on one back roads I saw a sign in front of a broken down shanty-style house: "Talking Dog for Sale." Well I needed a break so I stopped to see what the deal was. I went into the backyard and see a nice looking Labrador retriever sitting there. "You talk?" I ask. "Yep," the Lab replies. Well after I got over the shock of hearing a dog talk, I asked "So, what's your story?" " Ah shucks there ain't much to tell. Is that a VUU screwdriver antenna on your truck out there?" "How did you know that," I ask? The Lab looks up and says, "Well, I'm a ham radio operator. I got my Ticket when I was a young pup and in no time at all I had my 5 band DXCC in Phone and CW. The CIA heard about me and asked me to do some spy work for them. I would hang around the communications centers and with my keen hearing I could copy the transmissions. Because no one figured a dog would be eavesdropping, I was one of their most valuable spies for eight years." Copying high speed CW all day really tired me out and I knew I wasn't getting any younger. So, I decided to settle down. I retired from the CIA (8 dog years is 56 CIA years) and joined a ham radio club. In fact I won first place in the Oklahoma OSO Party two years in a row. Then I had a mess of puppies and got away from Ham Radio for a while. I sure miss my radio. Why don't you buy me and I'll be your CW operator in the Texas QSO Party. I said "let me see what I can do." I went back in and asked the owner what he wants for the dog. "Ten dollars," the guy says. "Ten dollars? This dog is amazing! Why on earth are you selling him so cheap?" "Because he's a liar. He never did any of that stuff. He's just a No Code Technician."

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AMSAT's Power Developments in the news
by Tom Clark, K3IO 22 Nov '07

22 Nov '07

Many of you have heard that Lew McFadin (W5DID), working with Steve Bible (N7HPR) and Steve's colleagues (especially Keith Curtis) at Microchip (the PIC people) have been working on a next generation power conditioning system. The basic idea is to have a power charge/discharge conditioner for each cell of the spacecraft's battery pack. This will allow the use of several different battery technologies (NiCd, NiMH, LiIon, etc) and also some of the new "super capacitors". Some of you who were at Dayton may have seen the breadboard mockup of system that Steve brought and Lew was showing. Lew was also showing some ~2000 Farad(!) 3 volt capacitors (some of us dubbed them "flux gate capacitors"). The SuperCap developments have been exploding of late. One immediate service is for regenerative braking in hybrid and electric vehicles, since the capacitors seem to be able to withstand a (virtually) infinite number of charge/discharge cycles, and then can "soak up" & discharge huge currents -- must faster than any chemical batteries can do. Batteries store watt-hours of energy, while capacitors handle large numbers of watts of power. One German light-rail system employs a total of 600 2600Farad capacitors for regenerative braking. Some US electric buses have capacitor banks with 144 18Farad capacitors that deliver 400 Amps at 360 Volts. Today I received the 11.15.07 edition of Electronic Design magazine, and there is an interesting technology review paper entitled "Get the Lowdown on UltraCapacitors" starting on page 45; the article is available online at http://electronicdesign.com/Articles/ArticleID/17465/17465.html. Starting on page 50 (the 3rd page of the online version) The AMSAT/MicroChip effort is described along with schematics (figure 6, also http://electronicdesign.com/files/29/17465/Figure_06.jpg). The closing paragraph (which doesn't mention the planed use of these concepts on Suitsat2) says: > Microchip worked with AMSAT-NA, the not-for-profit private organization that develops > amateur-radio satellites. AMSAT’s next big project, the Eagle satellite, is slated for > launch in March 2009. To make Eagle function for decades, it will have a power system > based on this work that combines solar panels, lithium-ion batteries, and ultracaps > in an integrated power system that will optimize the use of each of those components. Pretty good publicity! 73, Tom

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Thanksgiving Week
by Robert McGwier 20 Nov '07

20 Nov '07

I hope this note finds everyone on the Eagle and Suitsat teams having a pleasant mid-November. For those in the United States, I hope you have a pleasant Thanksgiving hiatus. For the first time in months, I will have four days in a row at home! Tomorrow I go to the intial meeting at the Laboratory for Telecommunications Sciences at U. Md. for the stand up of my team and the kick off of my project. This has been the most brutal six months of my career in the dealing with bureaucrats and it has played hell with most aspects of my life. I have not stayed with Tom and Elizabeth in weeks. I have foresworn Gin and Tonic for weeks so you know it must be bad! After tomorrow's kick off and following the Thanksgiving break and the GnuRadio Hackfest (next week and now a major activity at my work place) I expect to return to "full time HAM work" with a very large agenda. This past Friday night I spent time talking with Bob Davis and Saturday, I had a very good half a day with him at the Lab. He is just doing a great job but we have been allowing him to carry the load for us while trying to do a full time job of his own. I am hoping that more people will start to go over. AMSAT will support this activity. We are starting some fun things at the Pocomoke facility and with U. Md. E.S. The HASP balloon project has been joined by AMSAT through Hawk/AMSAT in Pocomoke. It will give us an early opportunity to fly our Suitsat 2 payloads and we will be pushing to finish those pieces (all of them) in time to get on the balloon. This will give us the focus we need to finish the RF pieces and the experiment interfaces. We are going to build the frame of Eagle in the lab this year. We hope to stand up an AMSAT Institute, a two week "camp for teachers" at UMES and Hawk in the coming summer. Bob and his volunteers have done a great job getting a lot done in the last few weeks. http://n4hy.smugmug.com/gallery/3841264 Soon the fire systems will be in and a certificate of occupancy granted and work can begin! Hawk has a Cubesat project. It is to be launched from Wallops on the DelMarVa peninsula next summer unless there are slips. Our labs are in the Hawk Institute for Space Sciences offices as seen in the photo's in the gallery above. There is work that needs to be done to help finish this off. I do not have a list of tasks yet but that will be coming soon. I will be doing my best to set a good example by going down there on two Friday's a month and working through most of Saturday starting in December "on my way home" from Maryland to NJ. This will be reasonably straightforward to figure out. N2HPE is off every other weekend and I will work in Md when she is working. We can accomplish a lot in the coming months and I hope you will soon feel the enthusiasm I do for the prospects for the end of the year and also 2008. Have a great week and Happy Thanksgiving to my U.S. friends. Bob -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair “An optimist may see a light where there is none, but why must the pessimist always run to blow it out?” Descartes

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[Fwd: Power & Signal Integrity with SIwave - Dec. 12, 8:30 a.m.-5:00 p.m. EST]
by Tom Clark 20 Nov '07

20 Nov '07

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[Fwd: HFSS Advanced Antenna Design Class - Dec. 11]
by Tom Clark, K3IO 16 Nov '07

16 Nov '07

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FYI -- ANSOFT HFSS
by Tom Clark, K3IO 13 Nov '07

13 Nov '07

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Re: [amsat-bb] Re: FYI -- One Laptop per Child (OLPC) Opportunity
by Tom Clark, K3IO 11 Nov '07

11 Nov '07

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Suggested 2008 Efforts
by Dick Jansson-rr 10 Nov '07

10 Nov '07

Bob: While you are looking at the plans for what we need to accomplish in 2008, I think that in the RF area we should include a physical modeling of at least the key parts of Tom Clark's suggested phased array antenna. We need to prove the principle. We will need the RF amplifiers and distributed gain aspects of this antenna to meet our orbital RF power and directivity goals. This then demands the creation of some real hardware - getting us past the heise luft part of the design into something that can point us to what the all-up, on-orbit hardware should look like. If this line is not examined, we then need to have a proposal for what we should pursue..... Tom's proposal seems like a reasonable starting point. Such an project will require the efforts of a multi-technology team. '73, Dick Jansson, KD1K <mailto:kd1k@amsat.org> kd1k(a)amsat.org <mailto:kd1k@arrl.net> kd1k(a)arrl.net

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Eagle Management Change
by Jim Sanford 09 Nov '07

09 Nov '07

Team: Last night I transmitted a significant letter to Rick Hambly, Bob McGwier, and the AMSAT Board of Directors. As a result of life changing events this year, I have realized that I no longer have time for amateur radio and therefore Eagle. With GREAT regret, I tendered my resignation as Project Manager and Assistant VP (Director) of Engineering. I simply do not have the time to do this right, and would therefore prefer someone else do it. I deeply regret having to take this decision. I got into this when asked because I saw it as a chance for me to give something back to AMSAT. It also gave me the wonderful opportunity to work closely with the awesome intellect that you all represent. Working with you people, this team, has been a highlight of my personal and professional life. It is painful to step away, but I must do so -- I'm over extended, and must reprioritize some things in my life. Many of you have worked very hard and have worked hard at doing things differently. In the process, you've taught the ENTIRE ORGANIZATION some new things that we must deal with in todays era of electronics -- both process and technical details. I beg you all to not give up and please continue. I will support and encourage from the side lines, as I can. Thank you all for all that you've done. I wish you, and Eagle, only good things. Very 73, Jim wb4gcs(a)amsat.org

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Re: Eagle Management Change
by Bill Tynan 09 Nov '07

09 Nov '07

Tom: Thanks for the vote of confidence. The answer in NO, not at my stage in life. I was thinking in terms of Barry Bains - replace one retiered Navy officer with another. 73, Bill ----- Original Message ----- From: "Tom Clark, K3IO" <K3IO(a)verizon.net> To: "Bill Tynan" <btynan(a)beecreek.net> Sent: Thursday, November 08, 2007 2:39 PM Subject: Re: [eagle] Re: Eagle Management Change > Bill Tynan wrote: >> Jim: >> >> I am very sorry to learn of your resignation as Eagle Project Manager. >> Big >> programs such as Eagle, no matter what kind of organization is doing >> them, >> require the type of disciplined management you have been providing. I >> can >> think of an AMSAT project >> completed a few years back which would have benefited greatly from your >> kind of leadership. >> >> It know your work as Eagle Project Manager has been a strain, especially >> since you are also holding down a full-time job. Many AMSAT functions >> require talented people who don't have to work for a living. But such >> people >> are hard to find. >> >> I hope the AMSAT officers will be able to locate someone who can fill >> your >> shoes, but that will be difficult. >> >> Good luck and hope to see you active in AMSAT again when that becomes >> possible. >> >> 73, >> >> Bill, W3XO >> > Would you be interested? -- Tom

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FYI -- One Laptop per Child (OLPC) Opportunity
by Tom Clark, K3IO 09 Nov '07

09 Nov '07

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upcoming events
by Robert McGwier 09 Nov '07

09 Nov '07

I would like to hold a Teamspeak meeting on Monday night starting at 9 P.M. eastern time. Between now and early December I am going to be putting together a plan forward and I will be seeking input from many of you. We need to hold a meeting as soon as it is practical to hold it and we find the appropriate venue. My only mandatory attendance for this particular Teamspeak session is Bob Davis and I, so if Bob cannot make this, we will move it. Secondly, if Jim is available, I would like for him to come and give us his exit report if he wants to and for us to be able to let him hear much we want him back when he finds his busy life will allow him to return. My main agenda item for Monday night will be for us to get a report on the activities of the AMSAT lab construction delivered by AMSAT Lab director Bob Davis. Ron Bettini of Hawk Space Institute is about to deliver a request for volunteer help for some specific tasks that need doing for Hawk to finish integration of its Cubesat. I have agreed to try to advertise the need. I assume Bob will be his proxy but Ron is most welcome. AMSAT and Hawk are going to jointly administer a "space camp" at UMES next summer if the details can be worked out (we stop talking and start acting) and we are rapidly approaching the time when the teachers we are trying to attract will have already made application to others and committed their available funds. We are going to need to volunteer adjunct faculty from our engineering team to aid with this. AMSAT is going to join with Hawk in a balloon project at the "spend a few dollars and package the Suitsat hardware for the balloon" level. I would like for Bob to fill us in on those details. I want to get together as soon as possible a clear set of parameters for the RF systems I intend to have us build during 2008 and for which the AMSAT BOD has given us a budget. I am not looking to build flight hardware but a significant investment has been made in prototyping tools so we can develop code for the full up HELAPS and the ACP software foundations on the same development platform. We need to put together a clear concept of our intended operations on Intelsat and to get some prototype hardware built so the prototype development system can put it all on the air and demonstrated and tested. As soon as is practical, we need to be able to demonstrate a prototype ACP and a prototype SDX so we show the functionality can be built if funding is found for the flight system and the launch. We have not yet reached the point where any firm decisions can be made which would allow us to build fight RF hardware for either Eagle or Rideshare because they are significantly different missions. One is RF with a few space challenges and with more DC power than we ever dreamed possible. The other is all the challenges of managing a complex satellite on which we grudgingly allow what RF can be accomodated. But I have my marching orders from my boss, BUILD SOMETHING. I am prepared to demonstrate we can. By the time I get done writing all of that up for the journal Engineering Notebook column, my arms will be breaking off. Should we have other agenda items that need to be covered, please email me directly. The bod and officers outside the Eagle team members are NOT invited to this session because this has nothing to do with tech snobbery. There is a limit to the number of people we can get on there. We have never reached it and I don't want to try and I want to try to stay focused on the long reports I have requested. I am seeking your input on things you would like to see us to discuss. You will be able to listen to the entire session should you so desire afterwards and we finish transcoding it and putting it up for download. There will be a written report posted to Eaglepedia as soon as I figure out the levers to pull. Bob -- AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair “An optimist may see a light where there is none, but why must the pessimist always run to blow it out?” Descartes

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TS Meeting
by Dick Jansson-rr 08 Nov '07

08 Nov '07

Bob: I will be available for the TeamSpeak meeting on Monday 12.11.07 @ 2100est. Dick Jansson, KD1K <mailto:kd1k@amsat.org> kd1k(a)amsat.org <mailto:kd1k@arrl.net> kd1k(a)arrl.net

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Phased Array on an IC
by Tom Clark, K3IO 08 Nov '07

08 Nov '07

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Phase 4 on Amateur Radio Newsline
by JoAnne Maenpaa 02 Nov '07

02 Nov '07

Hi Everyone, In case you haven't seen it, here is the pre-feed version for Amateur Radio NewslineT Report 1577 - November 2, 2007 in regard to Phase 4 Lite. -- 73 de JoAnne K9JKM k9jkm(a)amsat.org HAM RADIO IN SPACE: AMSAT SAYS HAM RADIO GEOSAT IN PLANNING Its called Phase 4 Lite and it will likely change the face of ham radio forever. Amateur Radio Newsline's Bruce Tennant, K6PZW, has a peek at the future of a geosynchronous ham radio satellite in Earth orbit: -- The weekend of October 26th to the 28th has likely changed the face of ham radio space operations. So say two leaders in the Amateur Radio space program speaking at the AMSAT-North America Space Symposium in Pittsburgh, Pennsylvania. That's they announced that a first-ever geosynchronous ham radio satellite is now in its initial planning. In satellite talk, geosynchronous means stationary in the sky. From the standpoint of a ground station user, it means always knowing where to point an antenna. No tracking and no guesswork. At that gathering, AMSAT President Rick Hambly, W2GPS, and Vice-President of Engineering Bob McGwier,N4HY, announced that AMSAT has been in consultation with Intelsat. This, regarding an application of an Intelsat platform carrying amateur radio satellites into geosynchronous orbit. The Phase IV Lite Geosynchronous Payload is planned to consist of similar transponders already under development for the Phase 3 satellites. Accelerated development on the digital Advanced Communication Package is anticipated. The Intelsat geosynchronous platform would be able to provide the AMSAT Phase IV Lite payload with approximately 400 watts of DC power for 15 years. In addition to the on-orbit payload AMSAT plans to develop an earth station attainable by the average ham so that users can immediately take advantage of the audio, digital messaging, and video services of the Phase IV bird. The Advanced Communication Package would be a self-contained earth station which could be sent with amateur radio communication teams or delivered to disaster areas to provide for 24 hour a day, 7 day a week and 3565 days a year emergency communications. These teams would be able to point a small dish at a predictable spot in the sky and immediately begin delivering disaster communication support without depending on the vagaries of High Frequency propagation. But that's not all. Hambly and Mc Gwier say that the Phase IV payload could also be used to provide a Tracking and Data Relay System Satellite -like relay of ARISS communications. The current 10 minute school contact could now be expanded to hours-long contact with the International Space Station. This opens possibilities for extended student involvement with experiments aboard the space station. As the late Roy Neal, K6DUE, might have said: Truly a new world of Amateur Radio. For the Amateur Radio Newsline I'm Bruce Tennant, K6PZW, in Los Angeles. -- So when can we expect this new satellite to be on-orbit?, AMSAT says that engineering studies, funding studies, among other negotiations are continuing so no specific date can be set. However Bob McGuier N4HY observes that the project is far enough along that AMSAT needs to begin planning engineering work and possible construction of such a geosynchronous payload so it is ready if Intelsat says they have a ride for it. (AMSAT-NA)

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Re: New Module
by Dick Jansson-rr 01 Nov '07

01 Nov '07

Chuck: Implicitly all that information existed already on the E05 60 Module drawing. I have today changed this drawing to Rev.02 to incorporate these specific dimensions. You have 28.4mm clearance to the cover flange of the E05 62 Connector Plate, which is intruded by 3.2mm for the cover screw and its PEM nut pressed into the flange. All other dimensions that you need are located on the several drawings, which is why I uploaded the complete set of drawings. '73, Dick Jansson, KD1K <mailto:kd1k@amsat.org> kd1k(a)amsat.org <mailto:kd1k@arrl.net> kd1k(a)arrl.net -----Original Message----- From: Chuck Green [mailto:greencl@mindspring.com] Sent: Thursday, 01 November, 2007 16.21 To: Dick Jansson-rr Cc: Bob Davis Subject: Re: [eagle] New Module Hi Dick, For those who have extreme connector issues it might be helpful if they had information regarding the cover attachment to the connector plate. This information might logically be added to the connector plate drawing. How far does the nut protrude into the module area? What is it's diameter? What is the distance from the top of the PCB to the center of this nut (assuming 0.062 inch PCB)? And how far might the screw reasonably be expected to protrude into the module area? Thanks, Chuck Dick Jansson-rr wrote: > > Bob: > > I have uploaded the drawings for the new E05 60, 140x180 Module, to > Eaglepedia. I did this so that people so interested can go there and > look at these drawings. > > I plan shortly, however, to modify the PCB and Baseplate slightly by > adding more mounting screws. I have somehow to convey that some of the > added screws are optional depending upon the PCB dissipation. This > step to add more screws is part of the realization that screws spaced > 50+mm apart may not provide sufficiently effective contact of the PCB > to the Baseplate. Modules such as the U Receiver will definitely need > the added screws. This tradeoff on this module is a significant > reduction in the need for added heat sinks, and their attaching screws > in the middle of the PCB. > > Your timely comments on this module would be appreciated. > > '73, > > Dick Jansson, KD1K > > kd1k(a)amsat.org <mailto:kd1k@amsat.org> > > kd1k(a)arrl.net <mailto:kd1k@arrl.net>

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New Module
by Dick Jansson-rr 01 Nov '07

01 Nov '07

Bob: I have uploaded the drawings for the new E05 60, 140x180 Module, to Eaglepedia. I did this so that people so interested can go there and look at these drawings. I plan shortly, however, to modify the PCB and Baseplate slightly by adding more mounting screws. I have somehow to convey that some of the added screws are optional depending upon the PCB dissipation. This step to add more screws is part of the realization that screws spaced 50+mm apart may not provide sufficiently effective contact of the PCB to the Baseplate. Modules such as the U Receiver will definitely need the added screws. This tradeoff on this module is a significant reduction in the need for added heat sinks, and their attaching screws in the middle of the PCB. Your timely comments on this module would be appreciated. '73, Dick Jansson, KD1K <mailto:kd1k@amsat.org> kd1k(a)amsat.org <mailto:kd1k@arrl.net> kd1k(a)arrl.net

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Call for Symposium Photos
by JoAnne Maenpaa 01 Nov '07

01 Nov '07

Hi everyone, I'd appreciate it if you could forward me any photos from the Symposium that you think would be suitable to print in the AMSAT Journal. I noticed a few nice cameras clicking away :-) Direct e-mail to me is k9jkm(a)comcast.net in case the amsat alias gives you any heartburn with big attachments. Thanks! -- 73 de JoAnne K9JKM k9jkm(a)amsat.org

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