AMSAT-BB June 2008

173 participants
281 discussions

Cubesat report over VK
by David 01 Jun '08

01 Jun '08

Hello All, On the pass just finished (2008/06/01: 2315 UTC) CUTE1.7 - CW telemetry heard and sent, COMPASS - not heard while monitoring CUTE1.7 SEEDS - digitalker / SSTV mode DO-64 silent on both downlink frequencies as usual. 73 de David VK5DG

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Satellite Prediction Listing (SPL) Web Service Online
by Phelps Williams 01 Jun '08

01 Jun '08

Satellite Prediction Listing (SPL) is up and running. Utilizing a REST interface HTTP GETs are used to specify the propagation parameters. This web service is meant to be used by web or desktop apps removing the necessity to integrate an orbital propagation model into the application. Currently the SGP model is being used. The entire Celestrak library is available as well as the classified TLEs published by Mike McCants. An autoupdate satellite library manager automatically refreshes the local cache of celestrak and classified tles. The entire library is flushed every 24 hours allowing for new additions to Celestrak to be added. Celestrak seems to be the best alternative to directly grabbing Space-Track.org elements which would violate the usage agreement if I understand correctly. All available spacecraft listed here: http://www.williamslabs.com/sat/validSats.py Output formats include XML, HTML, and the Keyhole Markup Language (KML) allowing integration into Google Maps and Google Earth very easily. Documentation and instructions on how to use the service are available here: http://www.williamslabs.com/sat Sample Google Maps / Earth integration examples here: http://www.williamslabs.com/sat/docs/kmlexamples.php SPL uses the Open Source KepCalc Python library available here: http://sourceforge.net/projects/kepcalc KepCalc provides a simple propagation library with nearly identical implementations in C#, C++, Python, and Java. Here are some examples of SPL: All default parameters: http://www.williamslabs.com/sat/spl.py 100 samples of satellite Libertad-1 on May 1st between 00:00:00 and 12:00:00 UTC: http://www.williamslabs.com/sat/spl.py?Satellite=31128&TimeStart=2008-05-01… A pass of default sat Genesat-1 over an update New York observer, one sample every 30 seconds: http://www.williamslabs.com/sat/spl.py?ObserverAltitude=300.0&ObserverLatit… Current position of the ISS in XML format: http://www.williamslabs.com/sat/spl.py?Output=xml&Satellite=25544 Position of AO-51 (28375) over the past hour with a sample every 60 seconds in KML format (try saving file as test.kml and load with Google Earth): http://www.williamslabs.com/sat/spl.py?Satellite=28375&Output=kml&TimeSpan=… Feedback and questions are very welcome. -Phelps Williams KI6GST

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Re: JUBILEE and other frustrations,
by Wayne Estes 01 Jun '08

01 Jun '08

Joe K7ZT wrote: Is it too much to ask for just a little bit of accountability for projects that exist as a result of public donations? If any organization can't do that then they shouldn't solicit donations. It is really a very simple concept. One shouldn't get their head snapped off just for asking the question about the status of a given satellite project! Wayne W9AE replies: AMSAT is a volunteer organization. Are you volunteering to fix this accountability problem? Wayne Estes W9AE Oakland, Oregon, USA, CN83ik AMSAT Area Coordinator

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Re: Official document about Yubileiny
by Peter Guelzow 01 Jun '08

01 Jun '08

Hi Andy, just back from our AMSAT-DL satellite symposium and AGM... andy thomas wrote: > I have the following from Moscow (have slightly altered the Babel Fish!!): > ...... > Papkov, A.P. " > Thanks a lot for this hint !!! RS-14 , OSCAR-21 with AMSAT-DL's RUDAK-2 was build in Kaluga by a team under the direction of Aleksander Papkov, RA3XBU. I met him personally in Kaluga, together with Leonid Labutin, ex-UA3CR... I have already asked my friends from AMSAT-R, but have no answer yet. But at that time I did not knew that RA3XBU is again involved and this should help now indeed... best 73s Peter DB2OS

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Possible telemetry system DOKA-B for Yubilieiny
by andy thomas 01 Jun '08

01 Jun '08

I'm pretty certain I have found some diagrams about the telemetry control of the YUBILEINY satellite: http://microsat.sm.bmstu.ru/pic/schemebig.gif shows the command station at Kaluga and http://microsat.sm.bmstu.ru/pic/Doka-b.gif shows the "DOKA-B" telemetry command system. The documents are on a website deveoted to the Baumanets microsatellite but as the mission is very similar (similar scientific- educational project) I think it's likely that this is the control system used. Note the modem interface within the radio section of DOKA-B and interfacing directly into the main board. I looked at the screenshot from "Cool edit" and it struckme thatthere was a tone (synch?) at 24 kHz throughout, with 5 frames per second at what looked to me as 8 frequency separated tones per frame. Does that give 5*8 = 40 bits per second? and does the 8 bits imply a direct serial transfer (8N1, etc) ? So I'm thinking now that it isn't WEFAX/APT and could be a direct serial portinto the onboard PC. 73 de andy G0SFJ __________________________________________________________ Sent from Yahoo! Mail. A Smarter Email http://uk.docs.yahoo.com/nowyoucan.html

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Re: New satellies / Shuttle question
by G0MRF＠aol.com 01 Jun '08

01 Jun '08

Hello Bruce, Thanks for the positive response. Batting ideas around sometimes produces a concept that is a winner, so the more ideas voiced the better. Interleaving a response into your mail will be difficult so I'll do this list style. 1) Cubesats and amateur radio. Yes, Delfi C3 is the best but sadly one of the very few to carry a usable communications package. It's been a pleasure meeting the Delft students at the annual AMSAT-UK colloquium at Surrey University for the last few years. They started by asking us hundreds of questions, but by last summer it was the AMSAT members who were sitting back during the D -C3 presentation asking questions about their satellite and the innovative Op-amp (not MMIC) based transponder design. I'm certainly looking forward to hearing it in a couple of months time. 2) Batteries or not? An interesting topic. Certainly DO-64 and AO-7 have made the point that batteries are not essential and have in the past caused the demise of many AMSAT spacecraft. I have suggested placing the equivalent of a solid state relay in series with the battery a few times before. Basic idea is that when the battery fails, usually short circuit, it can be isolated allowing the spacecraft to be run in sunlight directly from the panels. Taking the topic forward a little.....How about Ultra capacitors as an alternative storage medium? I haven't checked the following, but if it's incorrect I know I can expect a reply from someone on the BB. Ultracapacitors are available at e.g. 470 Farads at 2.5V If we take 3 in series we have an energy store with useful voltage. But what can it power? 470F x 3 in series = 156F with a max voltage of 7.5V So total energy stored in Joules is E = 0.5 x CV ^2 or E = 0.5 x 156x (7.5 ^2) or 4387 Joules Now, and this where my memory gets a bit blurred.... Isn't the Joule a "Watt second" ? So, does this mean this small array of capacitors could supply 1 Watt to a load for about 1 Hour or 3600 seconds? - I included a bit of loss there for a buck-boost converter and not taking the voltage down to zero. The downside could be what happens when a highly ionised particle impacts at high velocity with a charged Ultracapacitor. But that could be tested. 3) 29MHz antennas. Yes that would be a challenge. On receive it's not a problem as the natural noise level is very high but path loss is very low indeed. A loaded whip or even a loop or ferrite antenna could work. On transmit the higher the efficiency the better, but again low pass loss works in our favour. Regards David In a message dated 01/06/2008 02:04:27 GMT Standard Time, ve9qrp(a)gmail.com writes: On Sat, May 31, 2008 at 5:40 AM, <G0MRF(a)aol.com> wrote: > > Hi Edward / group. > > Most current construction or feasility study is centered on P3E / Eagle / > Intelsat /HEO where launch opportunities are rare and costs are high. > > Perhaps we should look at this problem from another viewpoint. Start with > what launch opportunities AMSAT can afford and then retake the technology > initative and investigate what minaturised payloads can we launch for that price? > > For example. Imagine a 2 or 3U cubesat type structure, or even one half the > size of AO-51 on last weeks Russian launch to 1500km. With payloads reduced > to transponders and a basic onboard computer and an Electrical Power System, > it would be feasable to put RF comms equipment into a decent orbit on 29MHz > 145MHz 435MHz with an RX on 1269. > For bands higher than 13cm doppler is a problem and path loss is quite high. > It may not be possible to provide the necessary DC power for transmitters > in a small structure. David: I asked the same question at the end of a thread decrying the lack of HEO satellites, hoping to start a conversation on the topic. Let's have one here. The best of this group is when we bat around ideas such as this. First, very soon we will have a great basis for future discussion in Delfi C3. Already, though, it shows that a 3x cube can hold transponder and deploy enough solar for a good transponder U/V (judging by its fantastic downlink now). Could we replace the science on board D C3 with a battery of chargeable cells and still stay within the cubesat weight requirements? Or, even more radically, can we do without batteries, given how we can live with AO-7 and D C3? My guess is that deploying a 29MHz antenna could be hard with that limited space. But it would represent a fascinating challenge. Perhaps the hardest part would be finding a ride to high LEO without propulsion. My sense is that Cubesats work economically because there are lots of them. Won't university groups interested in remote sensing see this as something worse than what they have with low LEO, for a greater cost? Maybe we could get a bunch of projects interested in high LEO together for one launch. Or, perhaps we could help one of the national groups that still have access to their countries' launch facilities, such as Japan or India or China. These might include a p-pod or two in a high LEO launch as a charitable act: much cheaper than a micro-sat. > Talking of DC power, the number of cubesats that fail due to power problems > is huge. The answer is to get inventive with deployable solar arrays. With > the engineering excellence AMSAT possesses it should not be impossible to > arrange a structure where the entire outer layer contains extra solar cells that > are deployed after seperation from the launcher. Imagine a 3U cube which in > orbit becomes a 3U box of electronics covered in cells, with an extended outer > 3U shell that deploys forming a 6U structure producing nearly double the DC > power. The 6U structure also makes antenna design easier A neat idea. What about film solar panels that would be unfurled once in orbit? I think these probably have such a lower efficiency that they wouldn't be worth the extra area they might cover. In any case, Delfi C3 gives a pretty great worst-case scenario. > For a slightly more risky idea.....small satellite propulsion. Again, > perhaps 3U cube, with the last section comprising a small motor. A single burn > unit could provide a really nice elliptical LEO orbit, perhaps 680km to 2000km. > Wouldn't that be interesting. I notice that there is an Austrian university > team who have developed a cubesat sized ion propulsion system asking if > anyone would like to try it. So, while this may initially seem a 'wild idea' it > is based on technology that is very nearly a reality. Regarding the ion propulsion, what if we were willing to wait a year or two before use, so that all solar energy went into boosting the orbit for that time? And then there's the transponder. How efficient could a SDX be? William, PE1RAH, is working on cubesat format UV transponders, I think. > Worth investigating? I really think we should look into S-band downlink, too. The stats on s-band in HEO might be scary, but I think in LEO it would still be high enough signal to be great fun. And we'd be colonizing an important band. > David G0MRF

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K3SZH
by w7lrd＠comcast.net 01 Jun '08

01 Jun '08

Nice picture of Joe- K3SZH in the latest Journal. Great accomplishment Joe. Keep trying my friend! 73 Bob W7LRD -- "if this were easy, everyone would be doing it"

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STS-124 = 32960 ???
by jean-claude.aveni 01 Jun '08

01 Jun '08

Spacetrack TLE : 1 June 08:30 UTC STS-124 (DISCOVERY) ?? 1 32960U 08027 08153.27675889 -.00053252 00000-0 -22731-3 0 39 2 32960 051.6444 098.4754 0008800 053.2742 097.0211 15.84240828 60 88/73 tk5gh -- *Jean-Claude Aveni* Tel portable : *06 80 92 38 79* Courriel prime : jean-claude.aveni(a)wanadoo.fr '' alternate : aveni(a)lma.cnrs-mrs.fr Site web à l'URL : http://astro-notes.org Call radio amateur : TK5GH

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New satellies / Shuttle question
by G0MRF＠aol.com 01 Jun '08

01 Jun '08

Hi Edward / group. Most current construction or feasility study is centered on P3E / Eagle / Intelsat /HEO where launch opportunities are rare and costs are high. Perhaps we should look at this problem from another viewpoint. Start with what launch opportunities AMSAT can afford and then retake the technology initative and investigate what minaturised payloads can we launch for that price? For example. Imagine a 2 or 3U cubesat type structure, or even one half the size of AO-51 on last weeks Russian launch to 1500km. With payloads reduced to transponders and a basic onboard computer and an Electrical Power System, it would be feasable to put RF comms equipment into a decent orbit on 29MHz 145MHz 435MHz with an RX on 1269. For bands higher than 13cm doppler is a problem and path loss is quite high. It may not be possible to provide the necessary DC power for transmitters in a small structure. Talking of DC power, the number of cubesats that fail due to power problems is huge. The answer is to get inventive with deployable solar arrays. With the engineering excellence AMSAT possesses it should not be impossible to arrange a structure where the entire outer layer contains extra solar cells that are deployed after seperation from the launcher. Imagine a 3U cube which in orbit becomes a 3U box of electronics covered in cells, with an extended outer 3U shell that deploys forming a 6U structure producing nearly double the DC power. The 6U structure also makes antenna design easier For a slightly more risky idea.....small satellite propulsion. Again, perhaps 3U cube, with the last section comprising a small motor. A single burn unit could provide a really nice elliptical LEO orbit, perhaps 680km to 2000km. Wouldn't that be interesting. I notice that there is an Austrian university team who have developed a cubesat sized ion propulsion system asking if anyone would like to try it. So, while this may initially seem a 'wild idea' it is based on technology that is very nearly a reality. Worth investigating? David G0MRF In a message dated 30/05/2008 23:22:37 GMT Standard Time, vk3jed(a)gmail.com writes: At 12:15 AM 5/31/2008, Edward Cole wrote: >Once you total the costs it may actually be cheaper to build a new >satellite and launch it! >Back the effort for P3E and Eagle/P4. That too, yes, a new bird would be the easiest approach indeed. Still, as I said, it was interesting contemplating how such a recovery might be achieved with today's technology. :) 73 de VK3JED

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ANS-152 AMSAT News Service Weekly Bulletins
by JoAnne Maenpaa 01 Jun '08

01 Jun '08

AMSAT NEWS SERVICE ANS-152 ANS is a free, weekly, news and information service of AMSAT North America, The Radio Amateur Satellite Corporation. ANS reports on the activities of a worldwide group of Amateur Radio operators who share an active interest in designing, building, launching and communicating through analog and digital Amateur Radio satellites. Please send any amateur satellite news or reports to: ans-editor(a)amsat.org In this edition: * AMSAT-NA Board of Directors Nomination Announcement * SatPC32 Version 12.8 Released * FCAL Mission Patch Winners * Satellite Shorts From All Over * Two Opportunities to Fly Your Name and Callsign in Space * ARISS Status Report for the Week of May 26, 2008 SB SAT @ AMSAT $ANS-152.01 AMSAT-NA Board of Directors Nomination Announcement AMSAT News Service Bulletin 152.01 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.01 Nominations are open for the AMSAT-NA Board of Directors (BOD). The nominations must be in writing and received at the AMSAT office by end of business June 15, 2008. AMSAT-NA member societies or five current individual members may make nominations of fellow members to serve a 2-year term. Three of the seven seats must be filled this year. The board members whose terms are expiring are: Tom Clark, K3IO Lou McFadin, W5DID Bob McGwier, N4HY Prospective AMSAT-NA BOD members generally attend two meetings each year, usually during the first and third quarters of the year. Attendance at the meetings is mandatory. Travel expenses for BOD meetings are paid for by AMSAT-NA. Nominations must be in writing and mailed to: AMSAT-NA Board of Director Nomination 850 Sligo Ave #600 Silver Spring, MD 20910 The nominations with descriptive information about each candidate will be mailed out July 15, 2008. Ballots must be received in Silver Spring,MD by September 15, 2008. Only active members as of July 24, 2008 are eligible to vote. [ANS thanks AMSAT HQ for the above information] /EX SB SAT @ AMSAT $ANS-152.02 SatPC32 Version 12.8 Released AMSAT News Service Bulletin 152.02 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.02 Erich Eichmann DK1TB has released SatPC32, version 12.8, a satellite tracking program which now contains improvements for Windows Vista compatibility, CAT control of multiple radios, and CAT control of Icom half-duplex radios. Erich Eichmann DK1TB has donated SatPC32 to AMSAT, so all proceeds support amateur satellite programs. Please support amateur satel- lites by registering your copy of SatPC32. A demo version may be downloaded from the author's web site: http://www.dk1tb.de/indexeng.htm. Some users of the new SatPC32 v12.8 have experienced a few minor problems with this release and Erich is investigating these reports. Registered SatPC32 users may use their existing registration code to activate the downloaded new version. New users are encouraged to purchase a registration code from AMSAT-NA, AMSAT-DL, or AMSAT-UK. The online store is down at the moment but you may purchase a regis- tration code by calling Martha at the AMSAT office at 888-322-6728. Version 12.8 will not be available on CD until the existing stock of 12.7 CDs is depleted. Here are the changes listed in the 12.8 "What's New" file: + The setup program has been updated to the the latest 32-bit Vista compatible version of Installshield Express. + The CAT steering functions of SatPC32 have been expanded to now include the ICOM IC-706MKIIG, IC-7000 and compatible radios. + Full duplex satellite operation with 2 separate radios for uplink and downlink has been improved. Numerous devices can be combined, e.g. the Yaesu semi-duplex transceivers with each other or with Icom semi-duplex radios or single band radios or Icom radios with each other. + The Vista compatibility has been improved. + SatPC32 now includes a simple text editor that can alternatively be used besides Notepad to edit auxiliary files (data files, i.e. Doppler.SQF). + Further improvements include operation of narrow FM mode of the IC-910H. The program now shows the file date of the selected Keplerian data file. CAT steering of the FT-736R has been fixed. [ANS thanks Erich Eichmann, DK1TB for the above information] /EX SB SAT @ AMSAT $ANS-152.03 FCAL Mission Patch Winners AMSAT News Service Bulletin 152.03 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.03 Ivan Galysh, KD4HBO wrote on behalf of the FCAL satellite mission, "Now that FCAL is down, I went through all the emails sent with FCAL data. I received data from Mike Ruppercht DK3WN, Armando Mercado N8IGJ, Bent Bagger representting AMSAT-OZ, and Edward Chuang BX1AD." Ivan continued, "All will receive an FCAL mission patch plus a mission coffee mug. One surprise about the mission patch. These are STP mission patches that have flown on the space shuttle when FCAL and ANDE were released. I will include the letter of authentication that indicates these patches flew in space. Thanks for all your help. Hope to do it again soon." [ANS thanks Ivan, KD4HBO for the above information] /EX SB SAT @ AMSAT $ANS-152.04 Satellite Shorts From All Over AMSAT News Service Bulletin 152.04 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.04 + Congratulations are in order for 10 year old Piyumi, VE4WPL in Winnipeg, Manitoba, Canada for making her first satellite contact on AO-51. She used an Icom IC-W32A handheld at 5 watts with an Arrow antenna to make the contact. + Patrick WD9EWK/VA7EWK represented AMSAT at the Yavapai Amateur Radio Club (YARC) and Verde Valley Amateur Radio Club (VVARA) joint hamfest on Saturday, 31 May 2008. He set up an AMSAT table at the hamfest and provided on-air demonstrations using the AO-51 satellite. + Allen, N5AFV was also active in promoting amateur radio satellite activity on the weekend of May 31 - June 1. On May 31 Allen op- erated via satellite from the second highest point in Texas at the top of Enchanted Rock. June 1 gave Allen the opportunity to operate using the Ten Ten International club call sign, W6OI from 20th Annual Ten Ten Hill Country Picnic. QSL information for both operations is to N5AFV with an SASE. + Richard, N2SPI managed the AMSAT Booth at the 2008 Rochester (NY) Hamfest this weekend. He was also on the air with live satellite demos. If you have an opportunity to promote AMSAT at a hamfest near you contact Martha at AMSAT HQ for materials. + Martian weather data from the Canadian Space Agency's weather station aboard the Mars Phoenix lander can be viewed on your computer using tool available from http://phoenix.lpl.arizona.edu/. Mac OSX 10.4.3 (or higher), or Vista is required. (Via UniverseToday.com). + Word has been received from VU2POP that AMSAT-India has completed construction of the Hamsat-2 transponder built by one of their student members. They are now working on flight plans for an orbit similar to to VO-52 and hopefully higher if possible. [ANS thanks everyone for the above information] /EX SB SAT @ AMSAT $ANS-152.05 Two Opportunities to Fly Your Name and Callsign in Space AMSAT News Service Bulletin 152.05 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.05 Although not totally amateur satellite related many AMSAT folks still enjoy all aspects of space exploration so here are a couple of fun things for you to enjoy, and perhaps involve young folks also. Send your name to the moon ... NASA invites everyone to take advantage of the opportunity to send your name to the Moon on board the Lunar Reconnaissance Orbiter. The LRO mission site has a form to send your name, embedded into a compu- ter chip, into orbit around the moon. The link to sign up is: http://lro.jhuapl.edu/NameToMoon/index.php. More information about the Lunar Reconnaissance Orbiter mission can be found at: http://lunar.gsfc.nasa.gov/moonfacts.html. Send your name into solar orbit ... Kepler is NASA's first mission capable of detecting Earth-size and smaller planets in the habitable zone of solar-like stars. Planned to be launched from Kennedy Space Center in February 2009, the space- craft will be launched into orbit around the Sun. When you submit your name, you may also chose to provide a message of 500 words or less of why you think the mission is important. Your will be stored on a DVD and rocketed into space on board the Kepler spacecraft. The link to sign up is at: http://namesinspace.seti.org/ The deadline to submit your name for the Lunar Reconnaissance Orbiter mission is June 27, 2008; the deadline to submit your name for the Keppler Mission is November 1, 2008. [ANS thanks NASA, SETI, and UniverseToday for the above information] /EX SB SAT @ AMSAT $ANS-152.06 ARISS Status Report for the Week of May 26, 2008 AMSAT News Service Bulletin 152.06 >From AMSAT HQ SILVER SPRING, MD. June 1, 2008 To All RADIO AMATEURS BID: $ANS-152.06 1. Delta Researchers School Contact Successful On Friday, May 23, Delta Researchers Schools 2008 Space Expo in Noordwijk, the Netherlands, experienced an ARISS contact via tele- bridge station WH6PN in Hawaii. Garrett Reisman, KE5HAE, answered 15 questions posed to him by children from twelve Dutch primary schools. The audio for this event was fed into the EchoLink AMSAT (101 377) and JK1ZRW (277 208) servers. Photos and audio will be posted on the ARISS-Europe Web site when available. 2. ARISS Delegate Receives CQ's Radio Hall of Fame Award ARISS delegate and mentor Gaston Bertels, ON4WF, was inducted into CQ magazine's Amateur Radio Hall of Fame for making a sig- nificant contribution to amateur radio and our planet. This award is given to persons who not only excel in personal performance in amateur radio, but also give back to amateur radio in a significant manner. On May 16, the American Radio Relay League (ARRL) ran a web story covering this news. See: http://www.arrl.org/news/stories/2008/05/16/10100/?nc=1 3. ARRL QST Articles on ARISS Activities The American Radio Relay League (ARRL) June QST published an item under "Media Hits" (page 12) about Yi So-yeon launching to space to perform ARISS ham activities. Also posted in the June QST is a Field Day multi-page insert. Under ideas for fun things to do on Field Day is a suggestion for hams to listen for general contacts being made from the International Space Station. 4. ARISS International Team Meeting Held The ARISS monthly meeting was held on Tuesday, May 20. Topics of discussion included the ARISS Face to Face Meeting to be held in Moscow in July and the status of SuitSat-2. Minutes have been posted. See: http://www.rac.ca/ariss/arisstel2008-05-20.htm [ANS thanks Carol, KB3LKI for the above information] /EX In addition to regular membership, AMSAT offers membership in the President's Club. Members of the President's Club, as sustaining donors to AMSAT Project Funds, will be eligible to receive additional benefits. Application forms are available from the AMSAT Office. 73, This week's ANS Editor, JoAnne Maenpaa, K9JKM K9JKM at amsat dot org

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AMSAT-BB June 2008