[amsat-bb] Re: Can we get them to fix AO-40 first then?
I'm no expert on AO-40, but to the best of my knowledge, the solar panels are not retractable - they are fixed in place. The satellite cannot be commanded on, as the shorted batteries shunt virtually all of the solar panel output, such that either the command receiver is not operating at all, or there is simply not enough juice to switch anything. Our best hope is that someday, the batteries will fail open, just as AO-7's batteries did, and AO-40 comes back to life when adequately illuminated. George, KA3HSW Four of the solar panels are retractable but not released. Please see some old pictures. As the orientation of AO-40 is not known it is better that the panels are kept around the satellite. If they still exists... There is enough power from a single panel to run IHU and some beacon if the bus wires and electronics are not damaged. Some sensors indicated that sun is shining into the satellite so there may be big hole(s) in it. Not sure about that raport though. Have to check out that. The beacons were loud with the omnis and data was easily received with rubber duck and hand held radio. Miss that fine telemetry sound. I have allways said that the world would be different if AO-40 were alive. Jari, OH3UW ___ Sent via amsat...@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
[amsat-bb] Re: Can we get them to fix AO-40 first then?
I would want to take the chance of trying to open those 4 solar panels, even if it was to see what happens. I don't know the exact layout of the equipment on board, but opening those panels just might trigger something good to happen. At this point, there really isn't anything to lose. Who knows? Opening the panels might expose the batteries to more heat from the sun, which could possibly cause them to open quicker, or if the orientation of AO-40 is off, the extra panels might receive enough light to get that IHU working again. Or if there's a short due to the event, moving the panels may remove the short (or fix an open). Do any of the command stations want to elaborate on why the panels have remained retracted? Has this been discussed? Of course, this is all depending on if the receiver will accept the command in the first place... I would wonder about the sensors picking up light inside the spacecraft too. Doesn't sound possible that telemetry would still be able to report this if there's holes in the craft. I'm only questioning opening the panels because it seems like it's the only possible thing left to try to resurrect the bird, but nobody wants to make the decision - just in case, which is understandable too. But I'd say go for it since there's nothing else to try she's been silent for a while now. Just my 2 cents worth. Keeping my fingers crossed that AO-40 comes back!... Larry Four of the solar panels are retractable but not released. Please see some old pictures. As the orientation of AO-40 is not known it is better that the panels are kept around the satellite. If they still exists... There is enough power from a single panel to run IHU and some beacon if the bus wires and electronics are not damaged. Some sensors indicated that sun is shining into the satellite so there may be big hole(s) in it. Not sure about that raport though. Have to check out that. The beacons were loud with the omnis and data was easily received with rubber duck and hand held radio. Miss that fine telemetry sound. I have allways said that the world would be different if AO-40 were alive. Jari, OH3UW ___ Sent via amsat...@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
[amsat-bb] Re: Road Trip finally comes to an end
Hi John, Good trip. I only worked you a couple of times but that's good considering the time available to me. :) You've made a number of people happy with some new grids and or new states. 73, Jeff WB3JFS - Original Message - From: w6...@comcast.net To: amsat-bb amsat-bb@amsat.org Sent: Sunday, October 11, 2009 6:19 PM Subject: [amsat-bb] Road Trip finally comes to an end Have arrived at home base now, so can get back to somewhat normal operations. I would like to thank all the ops who I worked while on this 16 day cross country adventure while operating in the following grids: DM26, DM65, EM25, EM45, EM63, EM73, EM70, EL79, EM40, EM00 and last but not least DM91. I have a stack of envelopes on my desk now to answer with return cards for your efforts, and also I think I have the ones that came via eQSL.cc all confirmed as of yesterday. I think the 2 prized Grids were EL79 and EM00. So, please bear with me and I will get the cards out ASAP. Again, thanks to all for giving me some challenges using the Yaesu FT60 HT and the ELK L.P. yagi, handheld. Funny though in all the RV parks I was in and operating, not one person came up to me and asked me what I was doing !! They all looked at me funny though. Oh, acouple of highlights of the trip was first the visual observation of the ISS on a pass over the Mississippi River which was something, as ! alot of the RV'ers were wondering what we were looking at, until I explained it, and then they all got a gander of it. Secondly, was finally meeing Glenn AA5PK eyeball to eyeball. Thanks for being a host and for letting me give a demo at the San Angelo Radio Club meeting of satellite ops. Was nice of AO-51 to be overhead at that time. See everyone back on normal shift now at home.. 73 de John W6ZKH DM06 ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Re: Can we get them to fix AO-40 first then?
The thing is, running the spacecraft with the panels open only works if the satellite is fully stabilized so that the panels continually point towards the sun. Stabilization only works if lots of things, pretty much everything in fact, is working on the spacecraft. I'd say that we've pretty much determined that is not the case. Let's follow the first rule of medicine (and spacecraft management), and do no harm, until something changes and we know more about what's going on up there. I, too, am anxiously awaiting that magic day when AO-07 gets a sibling. Greg KO6TH From: n1...@cox.net To: amsat-bb@amsat.org Date: Mon, 12 Oct 2009 02:26:36 -0400 Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then? I would want to take the chance of trying to open those 4 solar panels, even if it was to see what happens. I don't know the exact layout of the equipment on board, but opening those panels just might trigger something good to happen. At this point, there really isn't anything to lose. Who knows? Opening the panels might expose the batteries to more heat from the sun, which could possibly cause them to open quicker, or if the orientation of AO-40 is off, the extra panels might receive enough light to get that IHU working again. Or if there's a short due to the event, moving the panels may remove the short (or fix an open). Do any of the command stations want to elaborate on why the panels have remained retracted? Has this been discussed? Of course, this is all depending on if the receiver will accept the command in the first place... I would wonder about the sensors picking up light inside the spacecraft too. Doesn't sound possible that telemetry would still be able to report this if there's holes in the craft. I'm only questioning opening the panels because it seems like it's the only possible thing left to try to resurrect the bird, but nobody wants to make the decision - just in case, which is understandable too. But I'd say go for it since there's nothing else to try she's been silent for a while now. Just my 2 cents worth. Keeping my fingers crossed that AO-40 comes back!... Larry Four of the solar panels are retractable but not released. Please see some old pictures. As the orientation of AO-40 is not known it is better that the panels are kept around the satellite. If they still exists... There is enough power from a single panel to run IHU and some beacon if the bus wires and electronics are not damaged. Some sensors indicated that sun is shining into the satellite so there may be big hole(s) in it. Not sure about that raport though. Have to check out that. The beacons were loud with the omnis and data was easily received with rubber duck and hand held radio. Miss that fine telemetry sound. I have allways said that the world would be different if AO-40 were alive. Jari, OH3UW ___ Sent via amsat...@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 _ Hotmail: Trusted email with Microsoft’s powerful SPAM protection. http://clk.atdmt.com/GBL/go/177141664/direct/01/ ___ Sent via amsat...@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
[amsat-bb] thanks
A big thanks to Frank and his team for a fantastic conference Nick k5qxj ___ Sent via amsat...@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
[amsat-bb] Re: PCSAT still kicking
I saw a CQ packet from PCSAT show up on my Mobile on 144.39 yesterday! Does PCSAT switch between 144.39 and 145.825? I'm reasonably certain I received a packet with W3ADO-1 a few days ago... Yes, in the default mode, PCSAT has the transmitters cross-connected to both TNC's. SO if either TNC keys up, it keys up both transmitters. The idea was that this was a failure recovery mode so that we could get a command link to either TNC in case either transmitter failed. Once we had command, then we could disable tthe crossconnect. Duh... but not if the reason you got there was due to low power. We can command the isolation relay, but then we loose it 45 minutes later when we go into eclipse and we are back to crossconnected. Bob, Wb4APR ___ Sent via amsat...@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
[amsat-bb] Re: thanks
I second the motion!!! Fantasticis an understatement. Bob, K1REM -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]on Behalf Of Nick Pugh K5QXJ Sent: Monday, October 12, 2009 6:55 AM To: amsat-bb@amsat.org Subject: [amsat-bb] thanks A big thanks to Frank and his team for a fantastic conference Nick k5qxj ___ Sent via amsat...@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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.421 / Virus Database: 270.14.11/2430 - Release Date: 10/12/09 04:01:00 ___ Sent via amsat...@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
[amsat-bb] Re: Not everyone is working on ARISSat-1 . . . . The AMSAT NextGen Spacecraft Bus
As I mentioned a few weeks ago . . . Not all of us are focused on ARISSat-1. I left everyone with two thoughts: * Look to the Empire State near the Harvest Moon * A gift may arrive near the ides of May At the AMSAT Symposium (which happens to be occurring near the Harvest Moon) a paper was presented on behalf of a team of students from the State University of New York at Binghamton (Binghamton University), Thomas J Watson School of Engineering and Applied Sciences. The students form, as part of their Senior Design Projects, the core of an AMSAT volunteer team to modify the ARISSat-1 design into the Next Generation of OSCARs using the CubeSat specification, i.e. the NextGen Project. It will be an OPEN, modular design in furtherance of the decision at last year's symposium to create a building block architecture for future satellites. The core student team consists of 27 Systems Engineering students who are focusing on requirements analysis of ARISSat-1, documenting the ARISSat-1 systems, and analyzing the lessons learned from ARISSat-1 / other prior spacecraft. The goal is to have a modular, evolutionary design ready for NextGen's presentation at the 2010 Dayton Hamvention. (which happens to be occurring near the ides of May . . . ). There are also 7 Mechanical, Electrical and Computer Engineers working together with the Systems Engineers on the Power and Structure Systems of NextGen. The EEs will be focusing on redesigning the ARISSat-1 Power Systems to use Supercapacitors instead of batteries and reducing the footprint of some of the boards (ICB especially). The MEs will be focused on modifying the structure to incorporate deployable solar panels with a scalable design that will work for 1U, 2U and 3U sizes. So that's a total core team of 34 Students . . . plus advisers, mentors and volunteers The goal is for NextGen to be a Picosat-class bus structure that AMSAT, or any other University, can use for 1U, 2U, or 3U CubeSat spacecraft. We will be using good Industrial Engineering concepts to drive the unit cost down while maintaining reliability. If we can get the cost low enough to mass produce the NextGen bus, AMSAT could make the bus available at low-to-no-cost to qualified University groups - AMSAT would handle spacecraft operations during the primary mission, but when the primary mission is complete, the satellite is turned over to AMSAT for it's secondary mission as a new Amateur Radio Satelite - an OSCAR in every CubeSat. Now the satellite, given the right conditions, could have a lifetime equivalent to AO-7. This will allow Universities and Schools to focus on developing the payload and experiments to fit within the integrated and proven spacecraft bus. An Engineering Model of the NextGen CubeSat spacecraft bus will be on display at the Dayton Hamvention AMSAT Booth for everyone to study. The BU team is the core of the AMSAT team, but we are looking for other individuals and University/School teams to participate in all aspects of the spacecraft design - RF Systems - Guidance, Navigation, Control Experiment Systems - Power Structure Systems. This is an ongoing effort, it is not a one time event, but the start of a stable, evolutionary design process that will further STEM (Science, Technology, Engineering Mathmatics) with the Next Generation of engineers and amateur radio operators. We're going to do Evolutionary Change, not Revolutionary Change. We're going to utilize, modify and develop Reusable Modules We're going to start with Picosat-class and work our way up We're going to use good Systems Engineering standards and practices WITHOUT stifling creativity and the need to have FUN We're going to all LEARN something from each other Volunteers are needed, the adventure awaits! Time to stop talking and time to get working. There have been lots of posts on this list (AMSAT-BB) about not having enough of in-orbit spacecraft, - well now is your chance to make a difference. V O L U N T E E R ! Even if you only have an hour a week, you can mentor a student over the phone or you can peer review a document that the students(or someone else) are working on. If you have more than an hour a week, you can implement a small design change to an existing subsystem; you could respin the board layout to meet a reduced form factor; you could redesign a module to use different technology (there are lots of ways to do an SDX and lots of ways to do an IHU). If you are working with a University/School who is working on a CubeSat or thinking about it, talk to me, we're looking for other teams to contribute. Your students will get experience dealing with geographically-distributed virtual teams. Please feel free to contact me with any questions, comments or offers to volunteer. Alex Harvilchuck, N3NP NextGen Program Manager Alex, N3SQ wrote: There are some of us out here who are trying to bring a little order to the chaos and help
[amsat-bb] FM satellite operations again again over Europe
Hi all in Europe, It is obviously about time to repeate a few good points about operating via the FM repeater satellites. 1. Do not transmit if you can not hear it 2. When the satellite is busy - limit the number of QSO's to ONE 3. Do not call over an ongoing QSO 4. A valid QSO just needs the call and the report 5. Give way to weak stations like /p and /m 6. Allow DX-peditions to make as many QSO's as there are callers That was the short version :-) I have a long version in English, Italian, Russian, Spanish and French. I can send it to you if you want it. Could use a few other languages like Greek, Polish and others. It would be nice if you can get it in your national journals. And please no flames ! 73 OZ1MY Ib ___ Sent via amsat...@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
[amsat-bb] Re: Can we get them to fix AO-40 first then?
Greg D. wrote: The thing is, running the spacecraft with the panels open only works if the satellite is fully stabilized so that the panels continually point towards the sun. Stabilization only works if lots of things, pretty much everything in fact, is working on the spacecraft. I'd say that we've pretty much determined that is not the case. Let's follow the first rule of medicine (and spacecraft management), and do no harm, until something changes and we know more about what's going on up there. I, too, am anxiously awaiting that magic day when AO-07 gets a sibling. Greg KO6TH And taking Greg's analogy a bit further, imagine a comatose patient lying in his bed. Does the doctor stand at the bedside and scream at the patient, Tell me what's wrong with you so I can treat you!!! -- I don't think so. If that analogy seems too gruesome to you, then perhaps another one that many parents of small children have experienced first-hand will work. Your 3-year-old child wanders into the bathroom to investigate all the pretty things inside, and she pushes the door closed behind her. Then she plays with the doorknob and accidentally pushes the lock button. Parents frantically stand outside the locked bathroom door and plead with the child to please open the door, while imagining all the dangerous objects on the other side of the barrier, such as sharp scissors, scalding hair rollers, a large porcelain fixture full of water to drown in, etc. Please open the door! Mommy and Daddy aren't mad! Please just open the door! while the child on the other side has no idea what mommy and daddy are babbling about... In case you miss my point, with essentially no power making it to the IHU or the receivers, how is the spacecraft supposed to hear a command to open the panels, or even if it heard the command, execute it with no electrical power? Long before AO-40 went comatose (silent) for the last time, it had already been determined after long and careful deliberation that without the ability to properly steer the spacecraft attitude to keep the panels in the sun, they would do more good in the folded configuration, and so it was decided to NOT deploy them. There was some discussion on this point on the mail list. You could dig back through the archives to find that discussion if you were so inclined. Indeed, it would be wonderful if the patient woke up from her long sleep like AO-7 did. There's no harm in wishing, even when the odds of success are so slim... 73 de WØJT ___ Sent via amsat...@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
[amsat-bb] Re: Can we get them to fix AO-40 first then?
On 12 Oct 2009 at 8:50, jari.koivuri...@aina.net wrote: I'm no expert on AO-40, but to the best of my knowledge, the solar panels are not retractable - they are fixed in place. The satellite cannot be commanded on, as the shorted batteries shunt virtually all of the solar panel output, such that either the command receiver is not operating at all, or there is simply not enough juice to switch anything. Our best hope is that someday, the batteries will fail open, just as AO-7's batteries did, and AO-40 comes back to life when adequately illuminated. George, KA3HSW Four of the solar panels are retractable but not released. Please see some old pictures. As the orientation of AO-40 is not known it is better that the panels are kept around the satellite. If they still exists... There is enough power from a single panel to run IHU and some beacon if the bus wires and electronics are not damaged. Some sensors indicated that sun is shining into the satellite so there may be big hole(s) in it. Not sure about that raport though. Have to check out that. The beacons were loud with the omnis and data was easily received with rubber duck and hand held radio. Miss that fine telemetry sound. I have allways said that the world would be different if AO-40 were alive. Jari, OH3UW Just an excerpt from the amsat-dl AO-40 status page http://www.amsat-dl.org/journal/adlj-p3d.htm The BCR's are designed to function with the solar panels extended, when they have to handle over 3 times the power available in spin mode. You can also have a pretty good idea of AO-40 life at http://en.wikipedia.org/wiki/AO-40. Is AO-40 will be a next AO-07 in 30 years from 2004 lets say in 2034? just reading back this catastrophic event period i note this. --W4SM for the AO-40 Command Team PERSONAL NOTE : Like my colleagues on the command team, I have lived and breathed AO-40 for over four years. All of us can almost mentally decode 400 bps PSK. We hear it in our sleep. I was watching the battery voltage telemetry at the exact moment that the voltage dropped precipitously. In my day job I have frequently watched catastrophic events unfold in human beings, and the feeling was EXACTLY the same. Part of my day job is to have to make quick decisions during times such times, decisions that can have serious consequences. I was instantly aware that we had a serious power event, and I considered cutting the main battery loose and trying to run on the nearly completely discharged and untested under load aux. battery. However, because I did not have a clear understanding of where the primary fault was, I elected to watch things and try to figure out what was happening. The general rule of, when in doubt wait to understand works most of the time... In this case it didn't, and I'd sure like to live those minutes over again and cut the main battery loose. Hindsight is always 20-20. Of course, if it had crashed anyway, then I'd really be beating myself up. If it's at all possible to bring AO- 40 back, we will. If the voltage is clamped low and there is no other damage, we may end up waiting a long time for a cell to open, hopefully not as long as for AO-07. ..or it may happen today. No success for even weeks or months does not mean that we won't eventually be successful. We will sure keep trying. Several of you have written very nice notes of support. Thank you. I have a question in mind since that time. Is an open cell event as the one happens in AO-07 can in the last AO-40 batteries context and condition enable enough power/voltage-current to bring the satellite to some sort of life? - Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE ___ Sent via amsat...@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
[amsat-bb] Re: accidental RF into wrong cable of Arrow=bad duplexer?
Duplexer are bi-directional. Essentially passive bandpass filters--don't care which way he RF flows. --- On Sun, 10/11/09, Tim Goodrich t...@timgoodrich.net wrote: From: Tim Goodrich t...@timgoodrich.net Subject: [amsat-bb] accidental RF into wrong cable of Arrow=bad duplexer? To: amsat-bb@amsat.org Date: Sunday, October 11, 2009, 3:51 PM I am an owner of a 2m/70cm LEO satellite antenna with duplexer in the handle. Sometimes, I operate full duplex (two radios) and bypass the duplexer by attaching my own cables to the separate parts of the antenna (1 radio for 2m, 1 radio for 70cm). In the course of rushing to catch a satellite pass, I mixed up my connections and accidentally transmitted (5 watts) into one of the arrow antenna cables, causing RF to feed backwards into the duplexer. Recently, I have noticed decreased performance (poor reception, lower S/N, even on AO-51 when in the past it was full quieting) and am trying to ascertain if it could have anything to do with my mistake of feeding RF in the wrong direction into the duplexer. Could my mistake cause this problem? Thanks, Tim KI6VBY ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Yaesu GS-232B Problems Connecting
Hi, My 232B has worked fine in the past, but just today is acting up (last time I used it was a few months ago). I can't connect to it with hyperterminal or HRD. Following the directions of the manual, I have connected on various bit rates (1200, 9600), switched the device on, and hit enter a few times, but I never get a successful connection message. Could it be that the device stops working if it ever goes below a certain temperature? It's gotten cold recently, so that's the only thing I can think of. Thanks -Nate KC2SVI ___ Sent via amsat...@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
[amsat-bb] Re: FM satellite operations again again over Europe
I like rule number 3. I hate it when somebody calls cq while you are in the middle of a qso. 73, Eric. Eric Knaps Waterstraat 30 B-3980 Tessenderlo Belgium Tel. +32472985876 (mobile) http://www.on4hf.be OZ1MY schreef: Hi all in Europe, It is obviously about time to repeate a few good points about operating via the FM repeater satellites. 1. Do not transmit if you can not hear it 2. When the satellite is busy - limit the number of QSO's to ONE 3. Do not call over an ongoing QSO 4. A valid QSO just needs the call and the report 5. Give way to weak stations like /p and /m 6. Allow DX-peditions to make as many QSO's as there are callers That was the short version :-) I have a long version in English, Italian, Russian, Spanish and French. I can send it to you if you want it. Could use a few other languages like Greek, Polish and others. It would be nice if you can get it in your national journals. And please no flames ! 73 OZ1MY Ib ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Re: FM satellite operations again again over Europe
At 05:26 AM 10/13/2009, Eric Knaps, ON4HF wrote: I like rule number 3. I hate it when somebody calls cq while you are in the middle of a qso. In my experience, this is often due to a station that can't hear the downlink, but it's annoying in any case. 73 de VK3JED / VK3IRL http://vkradio.com ___ Sent via amsat...@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
[amsat-bb] Lack of CW on sats
Gentlemen, I have spent a substantial amount on money to set up a satellite station. During the past tree years I haven't heard too many station in CW! AO-7 is used in CW but much more DX could be heard if more station were in CW. On VO-52 we havent enough room. Usually a great number of stations are calling and you can hear a devil of a noise. The stronger wins! K3SZH asked you to use more CW several times. I am seconding him. Please use CW on VO-52 as well. gl de ha6nn Andras (Andy for short.) ___ Sent via amsat...@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
[amsat-bb] Re: Lack of CW on sats
I wish we had the same problem on VO52. Not too much activity here in the US on that wonderful sat, but I have made several CW QSOs on VO52. 73s John AA5JG --- On Mon, 10/12/09, Bato, Andras b...@starjan.hu wrote: From: Bato, Andras b...@starjan.hu Subject: [amsat-bb] Lack of CW on sats To: amsat-bb@amsat.org Date: Monday, October 12, 2009, 3:39 PM Gentlemen, I have spent a substantial amount on money to set up a satellite station. During the past tree years I haven't heard too many station in CW! AO-7 is used in CW but much more DX could be heard if more station were in CW. On VO-52 we havent enough room. Usually a great number of stations are calling and you can hear a devil of a noise. The stronger wins! K3SZH asked you to use more CW several times. I am seconding him. Please use CW on VO-52 as well. gl de ha6nn Andras (Andy for short.) ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Re: Lack of CW on sats
Is that not to be expected now that many countries have removed the more code requirement from their licenses? Bato, Andras wrote: K3SZH asked you to use more CW several times. I am seconding him. Please use CW on VO-52 as well. gl de ha6nn Andras (Andy for short.) -- Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032 Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail ni...@ngunn.net www http://www.ngunn.net Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385, Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN. ___ Sent via amsat...@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
[amsat-bb] AO-51 mode update
On tonight's pass at 23:20 I turned the 1268.7/435.15 repeater on. We'll run this along with the 145.92/435.3 repeater for a few days, except when collecting telemetry, until we get the rest of the schedule sorted out. 73, Drew KO4MA ___ Sent via amsat...@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
[amsat-bb] Re: FM satellite operations again again over Europe
Thank you sharing some good operating practices that would make satellite ops in the US more enjoyable and equitable as well. 73, Gary AB3ID * Hi all in Europe, It is obviously about time to repeate a few good points about operating via the FM repeater satellites. 1. Do not transmit if you can not hear it 2. When the satellite is busy - limit the number of QSO's to ONE 3. Do not call over an ongoing QSO 4. A valid QSO just needs the call and the report 5. Give way to weak stations like /p and /m 6. Allow DX-peditions to make as many QSO's as there are callers That was the short version :-) I have a long version in English, Italian, Russian, Spanish and French. I can send it to you if you want it. Could use a few other languages like Greek, Polish and others. It would be nice if you can get it in your national journals. And please no flames ! 73 OZ1MY Ib ** -- __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Sent via amsat...@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
[amsat-bb] Re: AO-51 mode update
Thanks Drew et al. No one else on but me, or at least I was all I could hear, on the 0100Z pass, run ning about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off. 73 Bob W7LRD - Original Message - From: Andrew Glasbrenner glasbren...@mindspring.com To: Amsat-BB amsat-bb@amsat.org, ao-51-mo...@amsat.org Sent: Monday, October 12, 2009 4:22:24 PM GMT -08:00 US/Canada Pacific Subject: [amsat-bb] AO-51 mode update On tonight's pass at 23:20 I turned the 1268.7/435.15 repeater on. We'll run this along with the 145.92/435.3 repeater for a few days, except when collecting telemetry, until we get the rest of the schedule sorted out. 73, Drew KO4MA ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Re: AO-51 mode update
Bob- W7LRD wrote: Thanks Drew et al. No one else on but me, or at least I was all I could hear, on the 0100Z pass, running about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off. 73 Bob W7LRD 450mw on .150, and 650mw on .300 right now. My guess is your receive antenna is RHCP. 435.150 feeds the LHCP antenna combination, so you are ~20 db down from the .300 downlink on a RHCP antenna. 73, Drew ___ Sent via amsat...@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
[amsat-bb] Re: Amsat conference follow-up regarding Cubesats, Education and Experimental projects and ITU
Samudra, I enjoyed your presentation and comments during the symposium, I apologize that I did not have a chance to talk one on one. I'll take a stab at some of your questions But first a few questions: Does cubesat employ all open standards, free for use, free of any copyright -or- patents ? The answer to this is substantially yes, although especially with patents it is hard to ever know for sure. What are the lifetime design goals of a cubesat system, and if they deorbit in a finite time, can more than a few cubesats be deployed in various stages in the same orbital plane and orbital track ? Even if many cubesats were deployed at the same time they would tend to spread out more or less randomly throughout the orbit due to minor variations in separation velocity over the course of a few weeks. BTW, I am curious, is there a certain orbital plane allocation for cubesats/altitude ? Who regulates this ? Could a cubesat (small) be launched into (e.g.) a fractional degree orbit .. e.g., 45.5 degrees and separate from 45.7 degrees etc as they are very small, or are the cubesats limited to separation in orbit by whole integer degrees inclination ? The inclination of the orbit that a cubesat ends up in depends on what the orbit of the primary spacecraft. A so called plane change to a different inclination is a very expensive maneuver in terms of propellant ... for example when the Space Shuttle goes to ISS it must launch within 5 minutes of the optimum time or the earth will carry the launch platform out of the plane of the ISS' orbit and there won't have enough maneuvering propellant to reach it. There is no specific need to hit an integer value of degrees, and to my knowledge there is no national or international body to regulate such things. -Joe KM1P ___ Sent via amsat...@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
[amsat-bb] Re: Amsat conference follow-up regarding Cubesats, Education and Experimental projects and ITU
Thank you for your response. I'll do a public search on USPTO.GOV and see what I can find on the cubesat elements. Does cubesat employ all open standards, free for use, free of any copyright -or- patents ? The answer to this is substantially yes, although especially with patents it is hard to ever know for sure. ___ Sent via amsat...@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
[amsat-bb] Re: AMSAT annual meeting
And lets not forget Steve, N9IP for his enormous effort at video taping the proceedings. Dave, AA4KN - Original Message - From: Bob McGwier rwmcgw...@gmail.com To: 'AMSAT-BB' amsat-bb@amsat.org Sent: Sunday, October 11, 2009 3:10 PM Subject: [amsat-bb] AMSAT annual meeting Tweets, Twitpix: http://twitpic.com/photos/rwmcgwier Apologies for the phone camera with the smudged lens (greasy fingers, what can I say?). MUCH better pictures were taken by Art Feller and his shotgun (irritatingly loud) Nikon shooting rapid fire like Puff the Magic Dragon and those will be available later. The symposium, full audio visual, will be available on DVD later thanks to Pat Kilroy and Dan Schultz. These offerings of mine are a quick peak at what went on. Cheers, Bob N4HY ___ Sent via amsat...@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 ___ Sent via amsat...@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
[amsat-bb] Re: AO-51 mode update
Bob- W7LRD wrote: Thanks Drew et al. No one else on but me, or at least I was all I could hear, on the 0100Z pass, running about 60W to a 24 loop yagi. Question-- What is the power of the 1.2ghz downlink? The signal strength is at least 3 S units less that the 435.3 frequency. Anyone with 1.2ghz stuff---dust it off. 73 Bob W7LRD Bob: It sounds like you were transmitting on UHF and listening to L-band. If that is the case, you will never hear anyone. You need to transmit on (UPlink to) 1268.7 MHz and listen on (DOWNlink from) 435.3 MHz. There is no 1.2 GHz DOWNlink. :( OTOH, maybe that was just a typographical error on your posting, because 60W to a 24 loop yagi does, indeed, sound like you were UPlinking on 1.2 GHz... :) Anyway, here are the voice modes that AO-51 supports: Mode V/U (J) FM Voice Repeater (QRP): Operational Uplink: 145.8800 MHz FM Downlink 435.1500 MHz FM Mode V/U (J) FM Voice Repeater: Operational **ON NOW** Uplink: 145.9200 MHz FM Downlink 435.3000 MHz FM Mode V/S FM Voice Repeater: Operational Uplink: 145.8800 MHz FM Downlink 2401.2000 MHz FM Mode L/U FM Voice Repeater: Operational **ON NOW** Uplink: 1268.7000 MHz FM Downlink 435.3000 MHz FM The chicken and egg paradox continues. No one will get on the L band uplink if no satellites listen to L band, and no satellites will listen to L band if no ground stations get on the L band uplink. The best solution? More satellites with multiple transponder capability, particularly (preferably) with linear transponders, and higher orbits. Wishing for that is a necessary, but not sufficient condition for the dream to come to pass... Just sign me confused and waiting, a/k/a W0JT ___ Sent via amsat...@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
