December 2009 - AMSAT-BB - mailman.amsat.org

XW-1 over Kuala Lumpur, Malaysia
by Sion Chow Q. C. (9W2QC) 16 Dec '09

16 Dec '09

Dear All, After a long time away from the satellites, I am pleased to report the reception of XW-1 over Kuala Lumpur, Malaysia. Time was 1416 UTC to 1435 UTC and I had a maximum elevation of 68 degrees. Managed to copy the beacon on 435.790 CW +/- with a very good signal of S9+. Tried to work the FM and Linear transponder, but unfortunately could not get the downlink. Is the transponder off during this pass? Time permitting, will try out again 1.5 hours from now. Congratulations to the China team for the very successful launch. 73, Sion Chow Q. C., 9W2QC, WQ2C.

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EM07, DM97 today
by ted 16 Dec '09

16 Dec '09

If everything goes as planned I'll be in Southern Kansas for the 1906Z and 2041Z AO-27 passes this afternoon. 73......ted....aa5ck

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XW-1 SSB inverting
by Mineo Wakita 16 Dec '09

16 Dec '09

JE1CVL, JH1EKH, BD4SY, JF2CTY, JH1BCL, JA5BLZ succeeded in QSO, over Japan, 12:36 UTC, 16 Dec 2009. 'V(LSB)/U(USB) Linear Transponder Inverting, Up+Down=581.690', actually 145.950(Up) / 435.740(Down). Sat. No. Uplink Downlink Beacon Mode Callsign ---- ----- ------ -------- ------- ------------- -------- XW-1 36122 145.925-975 435.765-715 435.790 SSB inverting BJ1SA XW-1 36122 145.825 435.675 435.790 FM_tone 67Hz BJ1SA JE9PEL, Mineo Wakita

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Re: XW-1 CW beacon
by Mika Siira 16 Dec '09

16 Dec '09

>----Alkuperäinen viesti---- >Lähettäjä: ei7m-wkt(a)asahi-net.or.jp >Päivämäärä: 15.12.2009 14:06 >Vastaanottaja: <amsat-bb(a)amsat.org> >Aihe: [amsat-bb] XW-1 CW beacon > >OBJECT A >1 36121U 09072A 09349.15640464 -.00000045 00000-0 00000+0 0 19 >2 36121 100.5046 046.2483 0006436 232.0630 127.9902 13.18995687 00 > >Beacon is active tonight over Japan, 11:04 UTC, 15 Dec 2009 >http://www.ne.jp/asahi/hamradio/je9pel/91215xw1.mp3 >Recorded by JE9PEL, 435.790MHz > >http://www.ne.jp/asahi/hamradio/je9pel/xw1_yubi.htm > > Hello, Just listened XW-1 beacon, signal clear and strong. I writed down some of the telemetry: BJ1SA XW XW AAA TTT AUE A4T ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AUE T6E ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AUE ABT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AUE TBE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AUE T6T ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW BJ1SA XW XW AAA TTT AUE TNT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW Mika, OH8MBN

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Programming question - frequency units
by Phil 16 Dec '09

16 Dec '09

Thank you for reading this. After a five year rest from the satellites I may soon be in a position to once again resume one of my favourite hobbies. So, over the past couple of months I have been updating my tracking programme. In the process I have discovered that I need to make a design change. Originally the whole programme used Hertz as the frequency unit until AO-40 came along and the numbers became too large for the int variables. It wasn't too difficult, at the time, to change to long variables but I found the long strings of numbers confusing especially in the configuration file. So then I experimented with double variables in Kilohertz. Around the same time AO-40 died and a lifestyle change ended my access to all satellites as well. I've rewritten the configuration class and modelled it around Erich Eichmann's sqf Doppler file which has made selecting satellites with multiple modes neater. This is where the design decision comes in. The main class now uses Kilohertz as the frequency unit while the radio class still uses Hertz. The main class is responsible for the conversion each way but confusion reigns supreme because some variables are in Hertz and others in Kilohertz. This is currently causing me a problem where I'm modifying the code that takes care of calculating a new uplink frequency when the receiver VFO dial is moved. It seems to me that the best idea is to rewrite the radio class so that it accepts double type Kilohertz parameters. This introduces minor frequency errors of a few Hertz due to rounding errors but I don't think that is a problem since my FT-847 only has a ten Hertz resolution anyway. Alternatively, I could convert the double frequencies in the configuration class to longs and use long variables in all other classes. This will now be a more difficult and error prone task to undertake. To answer my own question, I think working in Kilohertz might be the best option but I'd still like to know how others have handled frequency units. -- Regards, Phil

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XW-1 Over Brazil
by PY5LF 16 Dec '09

16 Dec '09

Hello Good signal of XW-1 , <http://www.youtube.com/watch?v=KXck-pDt9Fg> http://www.youtube.com/watch?v=KXck-pDt9Fg object 2009-072A. Antenna and radio controlled manually because my SatPC32 don't accept the Keps sent by Nigel / Mineo . Anyone know how to fix it ? 73 PY5LF LUCIANO FABRICIO CURITIBA-PR-BRAZIL GG54JM <http://www.qrz.com/db/py5lf> http://www.qrz.com/db/py5lf <http://www.falautomation.com.br/> www.falautomation.com.br

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XW-1 AFSK packet
by Mineo Wakita 16 Dec '09

16 Dec '09

Sorry. XIWANG-1 (HOPE-1) 1 36122U 09072B 09350.14452292 -.00000045 00000-0 00000+0 0 77 2 36122 100.4974 047.2295 0007562 040.0327 320.1583 13.16283842 130 AFSK packets were active yesterday over Japan, 12:55 UTC, 15 Dec 2009 Received by JA0CAW, 435.675MHz AFSK 1200bps 12:55 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud): Open BJ1SA-12:0 12:56 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud): Open BJ1SA-12:0 12:57 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud): Open BJ1SA-12:0 JE9PEL, Mineo Wakita

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XW-1 pass Australia
by Andrew Rich 16 Dec '09

16 Dec '09

Australia - Brisbane ICOM 706 MK II G - 2m 5/8 Whip (I know I know) 16/12/2009 08:30 PM Local - 10 degrees 435.796 MHz USB CW 16/12/2009 08:33 PM Local - 18 degrees 435.796 MHz USB CW 16/12/2009 08:35 PM Local - 28 degrees 435.793 MHz USB CW 16/12/2009 08:37 PM Local - 29 degrees 435.791 MHz USB CW 16/12/2009 08:38 PM Local - 30 degrees 435.790 MHz USB CW 16/12/2009 08:39 PM Local - 28 degrees 435.788 MHz USB CW 16/12/2009 08:39 PM Local - 26 degrees 435.785 MHz USB CW 16/12/2009 08:41 PM Local - 19 degrees 435.784 MHz USB CW 16/12/2009 08:42 PM Local - 17 degrees 435.782 MHz USB CW 16/12/2009 08:43 PM Local - 12 degrees 435.782 MHz USB CW 16/12/2009 08:44 PM Local - 10 degrees 435.782 MHz USB CW Andrew VK4TEC

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XW-1 Heard over VU
by Nitin Muttin [VU3TYG] 15 Dec '09

15 Dec '09

All, I heard the beacon of the XW1 during the 16:32 UTC pass on 15th Dec.VU2BJZ,VU2WMY and VU2GUR also heard the CW beacon. The signals were good right from AOS to LOS. The CW telemetry said that the beacon RF output power was 123 mw and the beacon power supply was as 0.65 volts. I used the telemetry decode application provided by the XW1 team. Recording of the telemetry signal can be found at http://vu3tyg.addr.com/XW1/XW1-Beacon.zip and the screen shot of the decoding application showing the data at http://vu3tyg.addr.com/XW1/xw-1data.GIF Congratulations AMSAT China on the successful launch and all the very best for the testing and activation of the payloads. 73's Nitin [VU3TYG] Secretary,AMSAT INDIA www.amsatindia.org ________________________________________________

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Re: XW-1 FM transponder works great
by John Marranca, Jr 15 Dec '09

15 Dec '09

Perhaps this is the "in-between" bird we have been praying for??? John KB2HSH -- _______________________________ John Marranca, Jr -PBX Technician- BN Systems, Incorporated Orchard Park, NY (716)406-7130

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