November 2011 - AMSAT-BB - mailman.amsat.org

22 Nov '11

http://www.nasa.gov/home/hqnews/2011/nov/HQ_11-394_Expedition_29_Landing.ht… 73s Bernhard VA6BMJ @ DO33FL

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SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
by Farrell Winder 21 Nov '11

21 Nov '11

On November 12, 2011 at 1908 Z my son Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder. Separate MMSSTV software setups on 2 computers with mode Robot 36 were used to Tx 435.750 LSB up and Rx 145.930 MHz down. It was a challenge, over several days of trying , to find the satellite in a favorable position with its (inadvertently) shortened antenna. Doppler along with Tx and Rx antennas were manually controlled. A picture of the original (my auto license plate) and the received picture from the satellite has been submitted to the ARISS SSTV Gallery. It is hoped others will try a similar experiment via the transponder and perhaps pictures could be exchanged. It is noted that Henk, PA3GUO also sent and received an SSTV picture as may be seen in the Gallery. Respectively submitted, with much thanks to Lou McFadin, W5DID, ARISS Hardware Engineering Manager and his team along with Sergej Samburov, RV3DR, Chief of Cosmonaut Amateur Radio Department for his engineering and testing contributions in Korolev, Russia. A very exciting and challenging satellite for Amateur Radio has been provided. Launch was August 5, 2011 but Re-entry according to recent reports may occur within the next few months. Farrell Winder, W8ZCF Cincinnati, Ohio

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Re: In School ARSSat Demos / lessons
by Clint Bradford 21 Nov '11

21 Nov '11

>> ... With ARISSat-1's main mission being Educational I would like to hear about people's experiences with schools in using ARISSat-1 as a teaching tool ... What do you need? Classroom lessons abound for all aspects of amateur radio as it applies to the satellites - from elementary school to college classrooms. Each ARISS contact has a lot of work "behind the scenes" at the campuses. There are phenomenal teachers and school administrations who really get behinds their ARISS projects. Be a little more specific with what you need - and I can either assist you, or point you towards excellent resources. Clint Bradford, K6LCS NASA / ARISS school technical support http://www.work-sat.com 909-241-7666

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Re: SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
by k6yk 21 Nov '11

21 Nov '11

I have copied and worked LOTS of SSTV stations on 20 meters. And some were not all that strong. There is a lot of QRM, doubling, people talking on SSB, etc etc on 14.230. We also did some SSTV on AO-51 a while back and I got some good pictures there, too. Here are a couple of 20M ones attached. 73, John, K6YK On Sun, 20 Nov 2011 17:47:40 -0500 (EST) "Bob Bruninga " <bruninga(a)usna.edu> writes: > > Jeff, KB8VCO and I were successful in transmitting > > a picture and receiving back an image via the > > ARISSat-1/RADIOSKAF-V transponder. > > By the way, once I got MMSTV loaded I decided to just park it on > 14.230 MHz all day long and watch the SSTV images come rolling in. > I have been watching them in my office (when I walk by that PC) and > although hear SSTV all day long, and some signals very strong..... > I must admit, only ONE in 2 weeks has been discernable as to what > the picture actually is.. > > ALl the rest you can tell MAYBE that it is some kind of picutre with > maybe some text at the top and the bottom, but NONE of them have > been readable. Yet, the signals sound like they would make a Q5 599 > SSB signal. Is it just me, or does HF multipath slur the imgaes > beyone all recognition.? > > Bob, WB4APR > _______________________________________________ > 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 > ____________________________________________________________ Get Free Email with Video Mail & Video Chat! http://www.juno.com/freeemail?refcd=JUTAGOUT1FREM0210

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Re: In School ARSSat Demos / lessons
by E. Michael McCardel 20 Nov '11

20 Nov '11

Clint, Thank you for your response. Let me clarify. At least for now, I am NOT looking for information is ARISS contacts, but rather with how educators have used ARISSat-1 in the classroom. That said I would be be glad to here from or about teachers and principals who got behind the ARRISSat-1 project. Specifically I would like to hear and see how schools may have listened to the voice telemetry or captured the BPSK -1000 telemetry or or the CW telemetry and how they may have fit a lesson around it. Also would be any classes who may have even ventured to make a transponder contact. I judge ARRISSat-1 and educational and OSCAR satellites could be better utilized in the classroom, even if they are only beacon sats. ARRIS contacts grab a lot of attention but with a couple hundred thousand schools in the country, their odds of ever making an ARISS contact is very slim. Yet, there are a lot of opportunities with the number of satellites that are active now and will be in the future to use them as a means to motivate and interest students in science, ham radio and AMSAT. I suggest that we as AMSAT should be leaders in establishing curriculum plans that might include our hobby. I am not alone here. Expect to hear more about this initiative in the coming weeks. Expect to see the AMSAT-EDU bb-list become active soon, as well, to become a forum for this discussion. So, Clint and all, point us toward those phenomenal educators and administrators, share with us your experiences. We don't need to recreate the wheel we just need to keep it rolling.. EMike, KC8YLD Message: 2 Date: Sat, 19 Nov 2011 14:39:09 -0800 From: Clint Bradford <clintbrad4d(a)earthlink.net> To: amsat-bb(a)amsat.org Subject: [amsat-bb] Re: In School ARSSat Demos / lessons Message-ID: <0D6B2D46-99CE-420E-9FE9-34C08DB50CD9(a)earthlink.net> Content-Type: text/plain; charset=us-ascii >> ... With ARISSat-1's main mission being Educational I would like to hear about people's experiences with schools in using ARISSat-1 as a teaching tool ... What do you need? Classroom lessons abound for all aspects of amateur radio as it applies to the satellites - from elementary school to college classrooms. Each ARISS contact has a lot of work "behind the scenes" at the campuses. There are phenomenal teachers and school administrations who really get behinds their ARISS projects. Be a little more specific with what you need - and I can either assist you, or point you towards excellent resources. Clint Bradford, K6LCS NASA / ARISS school technical support http://www.work-sat.com 909-241-7666 Sent from my iPad

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Follow-up on K7UGA satellite activity in mid-February 2012
by Patrick STODDARD (WD9EWK/VA7EWK) 20 Nov '11

20 Nov '11

Hi! Following up on this announcement that showed up in this weekend's ANS bulletin... > The Central Arizona DX Association (CADXA) is very pleased > to > announce their special event operation in celebration of > the > Arizona Centennial during the week of February 13-19th, > 2012. > > They will be using the callsign of the late Senior > Senator, > and Arizona native son, Barry M. Goldwater, K7UGA. > > Individual CADXA members will be operating from their home > sta- > tions located throughout Arizona during that week using the > call- > sign K7UGA. > > However, only special operating locations from Tucson, > Prescott > and Phoenix will be on the air celebrating the 100th > anniversary > on Tuesday, February 14th, 2012. > > Operations will be on all amateur bands (160-2 meters); and > will > be using CW, SSB, RTTY, PSK31 and Satellite modes. I hope to make time to be on some satellite passes from a location in Phoenix on 14 February using the K7UGA call sign. I received the OK from the CADXA to use K7UGA on the satellites during this week-long celebration. I will post more about specific passes I hope to work on this day, and the first part of the week of 13-19 February 2012, when we are closer to mid-February. At the end of that week (Friday and Saturday, 17-18 February 2012), I will use the K7UGA call sign for my on-air satellite demonstrations from the Yuma (Arizona) Hamfest, which is also serving as the 2012 ARRL Southwestern Division Convention. The hamfest site is the Yuma County Fairgrounds, along 32nd Street across the street from Yuma International Airport and Marine Corps Air Station Yuma and south of the I-8 freeway (grid DM22qq). I posted some information about this on AMSAT's online calendar of events: http://www.amsat.org/amsat-new/fieldops/eventDetail.php?eID=629 and the hamfest's web site has more details: http://www.yumahamfest.org/ As mentioned in the ANS bulletin, QSL requests for K7UGA QSOs during that week - including the satellite activity - will be handled by the designated QSL manager, Bob K7BHM: http://www.qrz.com/db/k7uga A picture of the K7UGA QSL card that stations will receive is on the QRZ.com link above. Thanks in advance go to the Yuma Amateur Radio Hamfest Organization (yes, a group whose sole purpose is to run this hamfest!) for providing AMSAT an indoor space at the hamfest for the 4th consecutive year, along with letting me run outside for the demonstrations with my portable gear. Demonstrations will be on FM and SSB satellites both days, weather permitting. I plan to give a satellite-related presentation at some point during the two-day event, but the date/time and location on the fairgrounds site will be posted on the hamfest's web site sometime between now and mid-February. 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

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A single ft-817 hooked up to satpc32 for linear satellite?
by ryan woods 20 Nov '11

20 Nov '11

I was wondering if you can use a single ft-817 with satpc32 for sats like ao-7? I have a 2meter all mode that i have use before but it sorta works when it wants lol but just was curious. 73 KD8ATF Sent from Yahoo! Mail on Android

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USB Rotore Controllore
by Thomas Doyle 19 Nov '11

19 Nov '11

Just wanted to see if anyone is interested in using the little slice of heaven from Italy known as the Arduino as a rotor controller. The Mega2560 board is ideal as it has hardware uarts and a/d converters. Even Radio Shack is carrying the Arduino stuff. It is very easy to use. If Radio Shack is carrying the stuff how hard can it be. I have my SatPC32 - Yaesu GS-5500 compatible rotor controller running on the Arduino Mega2560 and will share the source code if anyone is seriously interested. Send me a direct email if this interests you. Sent from my computer. 73 W9KE tom ...

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ARISS-1
by Marco 19 Nov '11

19 Nov '11

HI all , the ARISS-1 pass at 10:50 utc is open transponder ,I calling cq during orbit but not HRD station , thery strong signal 5/7 5/8 ,little setup and 35 watt power ,any station in QRV ? Thank in advance for replay Mark ik1ran

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Re: AMSAT-BB Digest, Vol 6, Issue 631
by Wilhelm Hartinger 19 Nov '11

19 Nov '11

----- Original Message ----- From: <amsat-bb-request(a)amsat.org> To: <amsat-bb(a)amsat.org> Sent: Friday, November 18, 2011 9:00 PM Subject: AMSAT-BB Digest, Vol 6, Issue 631 > Send AMSAT-BB mailing list submissions to > amsat-bb(a)amsat.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://amsat.org/mailman/listinfo/amsat-bb > or, via email, send a message with subject or body 'help' to > amsat-bb-request(a)amsat.org > > You can reach the person managing the list at > amsat-bb-owner(a)amsat.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of AMSAT-BB digest..." > > > Today's Topics: > > 1. Re: simplest USB rotor interface (H. Vordenbaum) > 2. Ao-51 at 2100z today (ryan woods) > 3. Re: Ao-51 at 2100z today (Clint Bradford) > 4. Re: Ao-51 at 2100z today (Rick Tejera) > 5. Re: simplest USB rotor interface (Thomas Doyle) > 6. Re: simplest USB rotor interface (Stefan Wagener) > 7. AO-27 questions -- so why the silence. (Tom Schuessler) > 8. Re: ARISSat-1 (37772) decay (Nico Janssen) > 9. Re: AO-27 questions -- so why the silence. (Andrew Glasbrenner) > 10. Re: Fwd: Mystery of the Lunar Ionosphere (Tony Langdon) > 11. HR3288 Bill to Reduce ITAR Restrictions on Commercial > Satellites (JoAnne Maenpaa) > 12. ChubuSat-1 (Trevor .) > 13. Re: ChubuSat-1 (Andrew Glasbrenner) > 14. Grid Squares (n0jy(a)lavabit.com) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 17 Nov 2011 14:51:46 -0600 > From: "H. Vordenbaum" <tower2(a)stx.rr.com> > To: "Wayne Estes" <w9ae(a)charter.net>, <amsat-bb(a)amsat.org> > Subject: [amsat-bb] Re: simplest USB rotor interface > Message-ID: <D64209A8073846A0B44B0C2749E81912@MRHARVEY> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=response > > The LVB Tracker is small. The switch buttons are for calibration mainly. > The switches on the G-5400/G-5500 can be used for manual control. With > the > USB interface you don't need to fool with another serial port. > 73, Harvey > K5HV > > > ----- Original Message ----- > From: "Wayne Estes" <w9ae(a)charter.net> > To: <amsat-bb(a)amsat.org> > Sent: Thursday, November 17, 2011 11:27 AM > Subject: [amsat-bb] simplest USB rotor interface > > >> As an AMSAT Area Coordinator, I occasionally get questions about rotor >> interfaces. So I need to become better informed about the interface >> options. >> >> I'm well aware of the LVBtracker, but to me it seems to be overkill for >> the intended purpose. It's not necessary for a rotor interface to have a >> big box, display, and control switches. The interface really only needs >> to contain A/D and D/A converters. All displays and controls can be >> implemented "virtually" on the computer's screen. >> >> Is there a simple and cheap USB interface for the G-5500 rotor? Something >> small and simple like FODtrack, but with a USB port? >> I'm aware of WinRotor USB, but nobody in North America seems to use it. >> >> Wayne Estes W9AE >> Oakland, Oregon, USA, CN83ik >> _______________________________________________ >> 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 > > > > ------------------------------ > > Message: 2 > Date: Thu, 17 Nov 2011 13:19:47 -0800 (PST) > From: ryan woods <kd8atf(a)yahoo.com> > To: "amsat-bb(a)amsat.org" <amsat-bb(a)amsat.org> > Subject: [amsat-bb] Ao-51 at 2100z today > Message-ID: > <1321564787.33812.androidMobile(a)web125517.mail.ne1.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Well this was the first time for me to work any satellites in a really > long time just wanted to day AO-51 still sounds great and i hope it stays > that way for a long time. Im running a wouxon ht to an arrow on a tripod > it works good but not as well at my th-d7a. Anyway just want to get some > input while im writing this....... I am always portable when im on the > birds and can never really get my logging down so just wanted to know > How everyone else goes about it?......... Thanks in advance > > 73 de KD8ATF > > Sent from Yahoo! Mail on Android > > > > ------------------------------ > > Message: 3 > Date: Thu, 17 Nov 2011 14:01:46 -0800 > From: Clint Bradford <clintbrad4d(a)earthlink.net> > To: AMSAT BB <amsat-bb(a)amsat.org> > Subject: [amsat-bb] Re: Ao-51 at 2100z today > Message-ID: <60C03798-0F06-4474-A18D-DD3E6B2776A3(a)earthlink.net> > Content-Type: text/plain; charset=us-ascii > >>> ... how do you all write down callsigns? > > I am not sure what your problem is. I mean ... > > -one hand for the Yagi > -one hand for the radio > -one hand for the speaker-mic > -one hand for the clipboard > -one hand for the pencil > -one hand for the tall glass of iced tea > -one hand for your smartphone with its satellite tracking program running > > (grin) > > I will sometimes use a smartphone voice recorder app to record passes, for > later review. In a shirt pocket, > to free up my other six hands. > > Additionally, I have built a little tray wide enough to accommodate my HT > on the boom of my Yagi. Helps > free another hand, as well as "counter-balancing" the front-heavy antenna. > Photos at ... > > http://web.me.com/clintbradford/k6lcs/Photos/Photos.html > > ... and ... > > http://web.me.com/clintbradford/Work-Sat/My_Gear.html > > > Clint Bradford, K6LCS > http://www.work-sat.com > > > ------------------------------ > > Message: 4 > Date: Thu, 17 Nov 2011 15:37:46 -0700 > From: "Rick Tejera" <saguaroastro(a)cox.net> > To: "'Clint Bradford'" <clintbrad4d(a)earthlink.net>, "'AMSAT BB'" > <amsat-bb(a)amsat.org> > Subject: [amsat-bb] Re: Ao-51 at 2100z today > Message-ID: > <20111117224144.FERK3766.fed1rmfepo202.cox.net(a)fed1rmimpo109.cox.net> > Content-Type: text/plain; charset="us-ascii" > > Not having as many hands as Clint, I use a y chord on the receive Cable > from > my headset to a small digital voice recorder. I still write the calls down > on a log I created, since I'll forget at least half of it by the time I'm > ready to key up :) > > After the pass I play the recording and get the time of the QSO by adding > the elapsed time to the start of the pass. > > Clear Skies > > Rick Tejera > Saguaro Astronomy Club > Phoenix, Arizona > www.saguaroastro.org > saguaroastro(a)cox.net > K7TEJ, AMSAT 38452 > > > -----Original Message----- > From: amsat-bb-bounces(a)amsat.org [mailto:amsat-bb-bounces@amsat.org] On > Behalf Of Clint Bradford > Sent: Thursday, November 17, 2011 15:02 > To: AMSAT BB > Subject: [amsat-bb] Re: Ao-51 at 2100z today > >>> ... how do you all write down callsigns? > > I am not sure what your problem is. I mean ... > > -one hand for the Yagi > -one hand for the radio > -one hand for the speaker-mic > -one hand for the clipboard > -one hand for the pencil > -one hand for the tall glass of iced tea > -one hand for your smartphone with its satellite tracking program running > > (grin) > > I will sometimes use a smartphone voice recorder app to record passes, for > later review. In a shirt pocket, > to free up my other six hands. > > Additionally, I have built a little tray wide enough to accommodate my HT > on > the boom of my Yagi. Helps > free another hand, as well as "counter-balancing" the front-heavy antenna. > Photos at ... > > http://web.me.com/clintbradford/k6lcs/Photos/Photos.html > > ... and ... > > http://web.me.com/clintbradford/Work-Sat/My_Gear.html > > > Clint Bradford, K6LCS > http://www.work-sat.com > _______________________________________________ > 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 > > > > > ------------------------------ > > Message: 5 > Date: Thu, 17 Nov 2011 17:59:56 -0600 > From: Thomas Doyle <tomdoyle1948(a)gmail.com> > To: amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: simplest USB rotor interface > Message-ID: > <CAHnRQRLnU26Qwpn10BWONRHGvJ3UagTQy97WcR4OnTSveBuUVA(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > The saebrtrack from AMSATs own Mark Hammond is probably the best > documented DIY board. The processor is a bit expensive and slow but the > one > I built does work. > I had a FoxDelta ST3 for a while but had problems with it right from the > start. I was able to return it without any trouble. It is probably the > best > deal out there. The easiest part of building your own is the software. The > program does not do much so it is straightforward and easy to write. An > lcd > display of some type is invaluable in troubleshooting but you can use a > terminal emulation program on a computer for set up. The buttons are not > needed if you have a G5500. The case and cables are the most work. > > http://sites.google.com/site/marklhammond/saebrtrack > > The LVB Tracker from AMSAT is great in that you can "have it your way". > Buy > only what you need from a bare board to a completed unit. It is also a > nice > way to help out AMSAT. > > http://www.amsat-na.com/store/category.php?c=Hardware > > Sent from my computer. > > 73 W9KE tom ... > > > ------------------------------ > > Message: 6 > Date: Thu, 17 Nov 2011 18:26:14 -0600 > From: Stefan Wagener <wageners(a)gmail.com> > To: Wayne Estes <w9ae(a)charter.net> > Cc: amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: simplest USB rotor interface > Message-ID: > <CAKu8kHAse8Q=S0QOPaaeE8e4=gWYq9YgNQZxoOAhD5AVxFLxGw(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Take a look at: > > http://easy-rotor-control.com/ > > Something for every taste and budget. > > > Stefan, VE4NSA > > > > > > > On Thu, Nov 17, 2011 at 11:27 AM, Wayne Estes <w9ae(a)charter.net> wrote: >> As an AMSAT Area Coordinator, I occasionally get questions about rotor >> interfaces. ?So I need to become better informed about the interface >> options. >> >> I'm well aware of the LVBtracker, but to me it seems to be overkill for >> the >> intended purpose. ?It's not necessary for a rotor interface to have a big >> box, display, and control switches. ?The interface really only needs to >> contain A/D and D/A converters. ?All displays and controls can be >> implemented "virtually" on the computer's screen. >> >> Is there a simple and cheap USB interface for the G-5500 rotor? Something >> small and simple like FODtrack, but with a USB port? >> I'm aware of WinRotor USB, but nobody in North America seems to use it. >> >> Wayne Estes W9AE >> Oakland, Oregon, USA, CN83ik >> _______________________________________________ >> 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 >> > > > > ------------------------------ > > Message: 7 > Date: Fri, 18 Nov 2011 07:48:16 -0600 > From: "Tom Schuessler" <tjschuessler(a)verizon.net> > To: <amsat-bb(a)amsat.org> > Subject: [amsat-bb] AO-27 questions -- so why the silence. > Message-ID: <008601cca5f8$b9362e70$2ba28b50$@net> > Content-Type: text/plain; charset=US-ASCII > > Several weeks ago I posted a question about the status of the AO-27 web > site > and the TOPR scheduling for that satellite. Recently Clint Bradford K6LCS > posed a similar question and got really no relevant response. Can someone > from AMSAT (or AMRAD) leadership give some insight into the state of that > program and whether the turn on schedule is still running on times > predicted > via the AO-27 Scheduler program which cannot receive updates because of > the > lack of the ao27.org site. > > Please, no crickets chirping. Be nice to have an explanation or guidance. > > Thanks, 73 and see you on the birds. > > Tom Schuessler N5HYP > > > > > ------------------------------ > > Message: 8 > Date: Fri, 18 Nov 2011 15:05:57 +0100 > From: Nico Janssen <hamsat(a)xs4all.nl> > To: amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: ARISSat-1 (37772) decay > Message-ID: <4EC66645.9080808(a)xs4all.nl> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hi, > > So far all my analyses of the evolution of the orbit of ARISSat 1 > have resulted in a predicted decay date sometime in December 2011. > Actually my current predicted decay date for this satellite is > December 17. Obviously it depends very much on how solar activity > develops in the coming weeks. > > So now we have seen decay predictions ranging from December 2011 > to April 2012. Let's see how we converge to the actual decay date. > > 73, > Nico PA0DLO > > > On 2011-11-16 20:28, Fabio Azzarello wrote: >> Hello Everybody, >> I totally agree with you James... the process is a continuous evolution. >> >> I did my prediction on October 6th for the "Chicken Little Competition" >> and >> my date was January 23rd 2012. >> >> It surprisingly agrees with your prediction done almost one month later, >> this make me think that my assumptions were right, up to now at least. >> >> >> 73s >> Fabio >> IW8QKU/5 >> >> >> Hi Jim, >> >> Thanks for the update on your AMSAT Journal article. >> There are several people on the bb who are following this topic and are >> busy >> plotting data. >> Any futher thoughts you have, as we move towards January would, I am sure >> be of >> interest. >> >> 73 John G7HIA >> >> >> >> >> ________________________________ >> From: DeYoung James<deyoung_james(a)yahoo.com> >> To: amsat-bb<amsat-bb(a)amsat.org> >> Sent: Tuesday, 15 November, 2011 17:29:31 >> Subject: [amsat-bb] ARISSat-1 (37772) decay >> >> Greetings, >> >> First, thank you Mineo for reading the AMSAT Journal and making several >> of >> my >> papers available >> on your web site. >> My AMSAT Journal >> paper published in the March/April 2011 issue is actually still fairly >> valid >> for the scenarios shown in the paper. The solar flux has turned out to be >> somewhat higher than was used/predicted in the paper. This has caused the >> atmospheric densities to be higher which results in higher decay rates. >> When I >> wrote the paper I had this nagging feeling that stopping the >> release height >> scenarios at 370-km was not going to be high enough. We are very >> fortunate >> that >> the ISS was boosted to such a height before release of ARISSat-1 and not >> after >> release! >> >> There is a >> valuable lesson, I think, to be made with respect to predicting satellite >> decay >> dates far into the future. The future state of the atmosphere, i.e. the >> atmospheric density that the satellite will pass through is poorly >> predictable >> in the long-term, say starting greater than a week or two into the >> future. >> Predictions of satellite decay dates months in the future should be >> evaluated with the understanding that your date of prediction errors may >> be >> large. The errors >> are due to the future uncertainties of the orbital path which >> grow quickly with time in a prediction. The atmospheric density is not >> the >> only >> source of error. Your orbit model, the integrator, and the accounting of >> the >> gravitational and >> drag forces among others will affect your results. >> Predictions of >> satellite decay dates are not do-and-forget. The general process is to >> make >> a >> prediction, get new measured observations of the height in the future, >> and >> at >> some point re-do your prediction when the errors become significant to >> you. >> With that all >> said here is my current prediction using the same tools used in the AMSAT >> J. >> paper and produced as of 2011 November 13th. The decay of ARISSat-1 >> (37772) >> will happen nominally on 2012 January 30th with a 10% rule-of-thumb error >> allowance of 18 days around this date. The >> errors may be larger than the rule-of-thumb indicates! >> Jim, N8OQ >> _______________________________________________ >> 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 >> _______________________________________________ >> 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 >> > > > ------------------------------ > > Message: 9 > Date: Fri, 18 Nov 2011 09:31:27 -0500 (GMT-05:00) > From: Andrew Glasbrenner <glasbrenner(a)mindspring.com> > To: Tom Schuessler <tjschuessler(a)verizon.net>, amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: AO-27 questions -- so why the silence. > Message-ID: > <8046624.1321626687665.JavaMail.root(a)mswamui-billy.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > > Hi Tom, > > Just for the record, AO-27 is not an AMSAT bird, and AMSAT has no input or > inside track into what goes on with the satellite. I know who the command > stations are, but as long as the birds running, there really isn't IMO > much reason to bug them. > >>From my observations and experience, you really don't need a scheduler to >>work AO-27. It's neat, but superfluous. Right now the satellite is turning >>on a little further south than normal, somewhere around 25 degrees >>latitude. This drifts just a tad earlier/further south each day, until one >>of the command stations resets it. So, if you listen to a pass, note when >>and where it turns on, and now you know where and when to look tomorrow >>and even next week. > > Keeping a satellite running is a lot of work, and I can only imagine it's > tedious after 18 years. Webpages and widgets come second after that. > > 73, Drew KO4MA > > > -----Original Message----- >>From: Tom Schuessler <tjschuessler(a)verizon.net> >>Sent: Nov 18, 2011 8:48 AM >>To: amsat-bb(a)amsat.org >>Subject: [amsat-bb] AO-27 questions -- so why the silence. >> >>Several weeks ago I posted a question about the status of the AO-27 web >>site >>and the TOPR scheduling for that satellite. Recently Clint Bradford K6LCS >>posed a similar question and got really no relevant response. Can someone >>from AMSAT (or AMRAD) leadership give some insight into the state of that >>program and whether the turn on schedule is still running on times >>predicted >>via the AO-27 Scheduler program which cannot receive updates because of >>the >>lack of the ao27.org site. >> >>Please, no crickets chirping. Be nice to have an explanation or guidance. >> >>Thanks, 73 and see you on the birds. >> >>Tom Schuessler N5HYP >> >> >>_______________________________________________ >>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 > > > > > > ------------------------------ > > Message: 10 > Date: Fri, 18 Nov 2011 08:23:23 +1100 > From: Tony Langdon <vk3jed(a)gmail.com> > To: Luc Leblanc <lucleblanc6(a)videotron.ca>, amsat-bb(a)amsat.org > Cc: eu-amsat(a)yahoogroups.com > Subject: [amsat-bb] Re: Fwd: Mystery of the Lunar Ionosphere > Message-ID: <4ec57b57.09b5e00a.192e.ffffa865(a)mx.google.com> > Content-Type: text/plain; charset="us-ascii"; format=flowed > > At 07:59 PM 11/17/2011, Luc Leblanc wrote:\ > >>I just got a flash is it possible the moon bounce signal where >>reflected on this "ionosphere" instead of the moon surface or both or is >>it >>the moon libration signal often reported by moon bouncer a kind of >>signal mix the one reflected over the surface and the one reflected by >>the ionosphere back to the moon surface working against each other? > > This could be one of many interesting questions to try and answer. :) > > 73 de VK3JED / VK3IRL > http://vkradio.com > > > > ------------------------------ > > Message: 11 > Date: Fri, 18 Nov 2011 11:03:36 -0600 > From: "JoAnne Maenpaa" <k9jkm(a)comcast.net> > To: <amsat-bb(a)amsat.org> > Subject: [amsat-bb] HR3288 Bill to Reduce ITAR Restrictions on > Commercial Satellites > Message-ID: <001d01cca614$03cb3eb0$0b61bc10$@net> > Content-Type: text/plain; charset="us-ascii" > > Hello everyone, > > I found out about H.R. 3288: Safeguarding United States Satellite > Leadership > and Security Act of 2011 via an article posted at UniverseToday.com > (http://tinyurl.com/6r3nb4m). > > HR3288 proposes to reduce ITAR restrictions on commercial satellite > development. I found additional information, including a link to the text > of > the bill, list of the co-sponsors, and a progress-tracking overview posted > at: > http://www.govtrack.us/congress/bill.xpd?bill=h112-3288 > > Perhaps something good will come out of congress. I now have something > constructive to write to my congresscritters about instead of messages > counting the days to the next election. > > Hopefully it bodes well for amateur satellite projects worldwide. > > -- > 73 de JoAnne K9JKM > k9jkm(a)amsat.org > > > > > ------------------------------ > > Message: 12 > Date: Fri, 18 Nov 2011 19:11:50 +0000 (GMT) > From: "Trevor ." <m5aka(a)yahoo.co.uk> > To: amsat-bb(a)amsat.org > Subject: [amsat-bb] ChubuSat-1 > Message-ID: > <1321643510.46353.YahooMailClassic(a)web27204.mail.ukl.yahoo.com> > Content-Type: text/plain; charset=utf-8 > > Google English article on ChubuSat-1, launch 2012-13, carries a V/U > configuration using AX25, see > > http://tinyurl.com/CubuSat1Article > > See also ChubuSat-1 on IARU satellite pages at > http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=199 > > 73 Trevor M5AKA > > > > > ------------------------------ > > Message: 13 > Date: Fri, 18 Nov 2011 14:37:52 -0500 (GMT-05:00) > From: Andrew Glasbrenner <glasbrenner(a)mindspring.com> > To: "Trevor ." <m5aka(a)yahoo.co.uk>, amsat-bb(a)amsat.org > Subject: [amsat-bb] Re: ChubuSat-1 > Message-ID: > <7790483.1321645073377.JavaMail.root(a)mswamui-billy.atl.sa.earthlink.net> > > Content-Type: text/plain; charset=UTF-8 > > 50kg! to SSO? I hope they manage to get a repeater or transponder on there > along with whatever digital relay it looks like they are planning. It > might be a good opportunity for a PE1RAH transponder, or the L/U repeater > AMSAT-OZ was developing! > > 73, Drew KO4MA > > > -----Original Message----- >>From: "Trevor ." <m5aka(a)yahoo.co.uk> >>Sent: Nov 18, 2011 2:11 PM >>To: amsat-bb(a)amsat.org >>Subject: [amsat-bb] ChubuSat-1 >> >>Google English article on ChubuSat-1, launch 2012-13, carries a V/U >>configuration using AX25, see >> >>http://tinyurl.com/CubuSat1Article >> >>See also ChubuSat-1 on IARU satellite pages at >>http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=199 >> >>73 Trevor M5AKA >> >> >>_______________________________________________ >>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 > > > > > > ------------------------------ > > Message: 14 > Date: Fri, 18 Nov 2011 13:57:56 -0600 (CST) > From: n0jy(a)lavabit.com > To: amsat-bb(a)amsat.org > Subject: [amsat-bb] Grid Squares > Message-ID: <17004.170.49.217.220.1321646276.squirrel(a)lavabit.com> > Content-Type: text/plain;charset=iso-8859-1 > > Does anyone know of an application for a Blackberry phone that will take > the Blackberry GPS location and convert it to the grid square? > > Thanks > Jerry > N?JY > > > > > ------------------------------ > > _______________________________________________ > Sent via amsat-bb(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT member? Join now to support the amateur satellite program! > http://amsat.org/mailman/listinfo/amsat-bb > > > End of AMSAT-BB Digest, Vol 6, Issue 631 > **************************************** >

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