January 2010 - AMSAT-BB - mailman.amsat.org

Re: AO-7 feat!
by kladuke1144＠msn.com 17 Jan '10

17 Jan '10

Thanks to all who expressed an interest in the qso between WC7V and RN1NW on ao7b. I have hoped to make this contact for over 30 years. The fact that it happened is thanks to Oscar 7 and Ted, RN1NW was 559 even as ao7 approached his horizon. The satellite was ascending at my qth and at about 3 degrees at the end of our qso. The QSO took place on orbit #60960 at 16:08Z. I had heard RN1NW a couple of days prior but didn't make the contact. Because of ao7's history and bright future, I think any contact on this satellite is a record. Thanks again to RN1NW. 73 WC7V Kerry -------------------------------------------------- From: "Pierre van Deventer" <pierrevd(a)icon.co.za> Sent: Saturday, January 16, 2010 11:01 PM To: "'Bob- W7LRD'" <w7lrd(a)comcast.net> Cc: <AMSAT-BB(a)amsat.org> Subject: [amsat-bb] Re: AO-7 feat! > Congratulations to Kerry WC7V and Fedor RN1NW for their QSO of 7,654 km > according to Tiny Locator. > > Hope to hear more details of the QSO, was it with CW or SSB? > > It would be nice to listen to the MP3 audio clip if there is one made. > > 73, Pierre ZS6BB > > > -----Original Message----- > From: amsat-bb-bounces(a)amsat.org [mailto:amsat-bb-bounces@amsat.org] On > Behalf Of Bob- W7LRD > Sent: 16 January 2010 21:40 > To: amsat-bb(a)amsat.org > Subject: [amsat-bb] AO-7 feat! > > To break away from the current irrelevant thread. A momentous QSO from > WC7V in DN45 to RN1NW in KP71 took place today on AO-7. The distance is > about 7659 km. Great going guys! Streeeeetching to foot print is always a > challenge and fun. I now return you to the current round of bs. > > 73 Bob W7LRD > Washington State AMSAT area coordinator > > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >

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Ongoing Spacecraft Systems R&D @ BU
by Alex, N3SQ 17 Jan '10

17 Jan '10

Andrew Glasbrenner wrote: > Date: Sat, 16 Jan 2010 20:11:46 -0500 > From: Andrew Glasbrenner <glasbrenner(a)mindspring.com> > Subject: [amsat-bb] Re: AO-7 feat! > To: "Vince Fiscus, KB7ADL" <vlfiscus(a)mcn.net> > Cc: amsat-bb(a)amsat.org > > Vince Fiscus, KB7ADL wrote: > >> Well, it certainly wasn't on FM. Why couldn't the next LEO be like a new >> AO-7 with modern technology? Why does the Board insist on cramming another >> single channel bird down our throats? >> >> > We also have a university in the Northeast working on a 3U cubesat that > will support a transponder powerwise. This was all laid out in the > donation letter, as well as Barry's Apogee View in the Journal. > > As Andrew mentioned, here at the State University of New York @ Binghamton we've been working along on our goals as outlined at the Symposium and in the latest edition of the Journal: (a) We have revised the ARISSat Power Supply Unit, Backplane and Solar Panel Charge Controller designs to use Pseudocapacitors instead of traditional batteries. Based on a worse-case, 600km orbit, we can produce a whole-orbit power budget of 7.5 watts using a 3U CubeSat design. If a spacecraft is launched into a more optimal orbit, like a sun-synchronous orbit, one of the two Pseudocapacitor banks can be removed. The design can be scaled to be used with other classes of spacecraft - 2U/1U CubeSat, Microsats, etc. The design has gone through two reviews with AMSAT Engineering. (Thanks Lou, Barry & Tony!) (b) We have a light-weight deployable solar panel design with integral magnetorquer coils for attitude control. The design contains original research and integrates CubeSat research from: * University of Delft (hinge concepts & use of Dyneema wire) * University of Illinois at Urbana-Champaign (flex-circuit magnetorquers & carbon-fiber substrate) * the Aerospace Corporation (thin-film attachment of solar cells) The design will produce about 12-15 watts per minute in any orientation (worse-case) for 3U, less with 2U or 1U If a spacecraft is launched into a more optimal orbit the number of solar cells can be reduced while maintaining the power budget (c) We have analyzed the existing AMSAT spacecraft modules (from ARISSat & P3D) and determined that: * We can fit the SDX and U/V Linear Transponder systems from ARISSat into a 2U or 3U CubeSat Chassis without significant re-design * The IHU is going to be slightly redesigned to incorporate the Command Decoder board functions * We can reuse the base concepts from P3D for the Sun & Earth Sensor Systems * We can reuse a 3-axis Magnetometer design (Honeywell) * If the ARISSat boards were redesigned/repackaged they could fit within a 1U Chassis. (d) Things to do between now and Dayton: * Complete thermal analysis of a baseline 3U spacecraft * Antenna design (based on U of Delft's spring steel U/V antenna deployment system) * Complete Attitude Determination & Control (ADAC) integration (magnetorquers, sun/earth sensors & magnetometer) * Finish building engineering model This R&D, being performed by Engineering Students for their Senior Design projects (8 ME's/EE's + 26 SE's), is being sponsored by AMSAT. So I encourage everyone to contribute what you can to AMSAT to help fund spacecraft systems development and launch opportunities. If we have reliable, lower-cost, modular systems, then AMSAT can be more responsive to any launch opportunity. We'll have more info on the research we're doing in the next issue of the Journal and look for us at the AMSAT table in Dayton! Alex Harvilchuck, N3NP NextGen CubeSat Program Manager

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Re: TS-2000 70cm Tx problem with AO 7
by Henk, PA3GUO 17 Jan '10

17 Jan '10

Hi The referred to article is mine: http://www.pa3guo.com/pll_unlock.html When then the radio shows dots "......" and you hear a "U" in morse code it is the (rara) PLL unlock issue. Firmware update does not help ps: Yahoo TS2000 groups have lot of info also Henk PA3GUO (loves his TS2000)

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TS-2000 70cm Tx problem with AO 7
by Starr 17 Jan '10

17 Jan '10

Hi All, After a number of years of being inactive satellite (artificial) wise, I am having fun trying them out again. I have a TS-2000X, one of the earlier models, and I have just installed Version 5 of Ham Radio Deluxe in the shack computer, (great software), to control the radio The problem I have is; while transmitting on 70cm and the frequency is changing to compensate for Doppler change, the radio often stops and the display shows dashes in the places where the frequencies were shown. The power to the radio is recycled to get it working again. If my memory serves me correctly there was a fix mentioned for this problem a few years ago. Any help would be much appreciated. 73 Starr ZL3CU AMSAT ZL member

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AO-7 feat!
by Bob- W7LRD 17 Jan '10

17 Jan '10

To break away from the current irrelevant thread. A momentous QSO from WC7V in DN45 to RN1NW in KP71 took place today on AO-7. The distance is about 7659 km. Great going guys! Streeeeetching to foot print is always a challenge and fun. I now return you to the current round of bs. 73 Bob W7LRD Washington State AMSAT area coordinator

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LEO/cube sat for sale 8000$
by Luc Leblanc 17 Jan '10

17 Jan '10

For those who are still dreaming for a HEO in the mean time just check below you can have your own LEO/tube sat satellite for 8000$ launch included payable with the major credit card and you even have payment options! I'm just waiting to see one of them on E-Bay As they said "TubeSats are designed to be orbit-friendly. Launches are expected to begin in December of 2010." Probably the replacing solution for our aging AMSAT-NA satellite fleet? Anyone with 8000$ can own his own satellite let me guess in a couple of years the same repeater frenzy will also reach the amateur satellite world. No more need of club or organization or IARU frequencies coordination . The perfect world... http://interorbital.com/TubeSat_1.htm "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE

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HO-68 on LOTW?
by Bill Dzurilla 17 Jan '10

17 Jan '10

Anyone know how to load HO-68 qsos to LOTW? I keep getting Invalid Satellite Name error. 73, Bill NZ5N

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Logging software
by Louis House 17 Jan '10

17 Jan '10

sssshhhhhh, I need in for just a second, please.. Can someone tell me if there is a logging software that keeps track of QSO data and will produce the proper ADI file too include the SAT Name and Propagation mode. LoTW will not recognize my SAT QSOs for certificate credit. I prefer to not spend hours editing ADI files to include this needed information will be greatly appreciated. Many thanks, Louis, KD5GM CW ;-) The Original Digital Louis, KD5GM CW ;-) The Original Digital

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Is HO-68 working?
by E. Kafetzopoulos 17 Jan '10

17 Jan '10

I tried to work HO-68 during the pass over West Europe on 16 Jan 20:20 Z and no signal was detected during the whole pass. Only at the highest elevation I noticed a weak echo of the dashes I was puting at the uplink. Am I doing something wrong (new keplerians, new activation timetable, commissioning change) or there is a problem in the bird? 73 de SV1EEK

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Re: Is HO-68 working?
by vk5alx＠amsat.org 17 Jan '10

17 Jan '10

Hi. Linear transponder was working fine over Australia 17 Jan 00:45 Z. Worked station VK6GA until switch off at 00:55 Z 73 Alex VK5ALX

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