May 2008 - AMSAT-BB - mailman.amsat.org

AAUSAT-II FFSK/MSK beacons 27May, 2008
by Mineo Wakita 27 May '08

27 May '08

I decoded 'aausat_26052008_2020utc.wav' (4.5MB) which was received by DK3WN / Mike Rupprecht. I used the following technical skill, then I got four telemetry data. http://www.ne.jp/asahi/hamradio/je9pel/aausati2.htm#bottom 1. Install Microsoft .NET Framework 3.5 2. Install demodulator.exe 3. Install decoder_demo.exe 4. Record as WAV file from AAUSAT-II FFSK/MSK 5. Convert to WAV using by sox.exe sox.exe aausat_29042008_0815.wav -t raw -c1 -r48000 -L -s -4 temp.wav 6. Convert to BIN using by demodulator.exe Demodulator.exe temp.wav raw_beacon_data.bin 7. Convert to TXT using by decoder_demo.exe decoder_demo.exe (Enter) 8. Then save automatically as beacon.txt

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Re: ISS digi active?
by Alan P. Biddle 27 May '08

27 May '08

Dave, The setup is covered. Just a scheduling question, which is largely answered. TNX Alan WA4SCA

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RS-30 Decode
by James Denneny 27 May '08

27 May '08

Copied RS-30 cw transmission ok. I am trying to setup to decode fm tlm. Tried to setup RS-30 in WISP. I could not copy/paste keps from .txt file. How do I complete WISP setup? Is there another decode package beside WISP? I thought I saw a reference to Throb 4. Jim K7EG

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Delfi-C3 status update 27 May 13:00 UTC
by Wouter Jan Ubbels 27 May '08

27 May '08

Hi all, another status update of the Delfi-C3 satellite: 1. First, something on a lighter note: we have posted two videos on our photo weblog at http://www.delfic3.nl/photoblog/ the first one of the final integration of Delfi-C3, and the second one was made on launch day, April 28th, during the pass over our groundstation when we first heard Delfi-C3 (after she had already been heard by Rick Mann in the US) and in which we decoded the very first telemetry. As you can see, things were both hectic & great fun that day! 2. Meanwhile, being almost one month in orbit, the satellite is doing fine, all telemetry still shows nominal values. The satellite is commanded regularly with good success down to low elevation (2 deg). We have not yet applied a final cure for the downlink cut out problem as we are doing some more testing when she is over our groundstation. 3. Rotation rate seems to have decreased significantly over the last weeks, we are still analyzing telemetry to further quantify this observation. 73 on behalf of the Delfi-C3 team, Wouter Jan Ubbels PE4WJ

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Re: ISS digi active?
by Alan P. Biddle 27 May '08

27 May '08

Dave, Gould, Roger, Jo Ann, etc, Thanks for the pointers. I have already have both sites, and experience has shown that they are excellent for "trend" information. Just listening is good enough for me, but new guys get hyper, and I get some calls that they heard nothing, and is their station broken? ;) Alan WA4SCA

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Re: RS-30 telemetry
by G0MRF＠aol.com 27 May '08

27 May '08

In a message dated 27/05/2008 09:36:47 GMT Standard Time, vk5dg(a)aapt.net.au writes: Hello All, Heard RS-30 transmit CW during the whole pass. Below is the telemetry received. Sounded ok. I also wonder if there is more to this satellite than the builders are letting on. 73 de David VK5DG Hi David. There certainly seems to be some form of picture data being transmitted. I managed to get 41 seconds of it but may have missed a bit at the begining. Still no idea how to decode it though. Best guess seems to be Domenico I8CVS assumption that it's transmitting an old format of 4 lines per second. So that's a minimum of 41 x 4 or 164 lines. Perhaps if 50 seconds that would be a 200 line picture. I just hope that the builders of the satellite haven't completely lost touch with the Russian amateur community in the last few years. So far the only parts of the transmission we can decode is the CW telemetry. It would be a real shame if the propritory format of the data is just intended for a small number of students within the company responsible for building RS30 and a lost opportunity if some sort of V/U comm's has not been included on a satellite with such an excellent orbit. Fingers crossed. David G0MRF

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RS-30 telemetry
by David 27 May '08

27 May '08

Hello All, Heard RS-30 transmit CW during the whole pass. Below is the telemetry received. Sounded ok. I also wonder if there is more to this satellite than the builders are letting on. 73 de David VK5DG 435.312MHz 2008/05/27 0730-0742 UTC RS30 missed this one IBS20 USUN1 ISUN0 ITXA6 ITXB6 TTXA65 TTXB66 TNAP80 TAB66 MSEP0 MCON53 SMA84 SMB64 MRXA2 MRXB2 RS30 US162 IBS22 USUN0 ISUN0 ITXA6 ITXB6 TTXA65 TTXB66 TNAP80 TAB66 MSEP0 MCON53 SMA82 SMB62 MRXA2 MRXB2 RS30 US161 IBS20 USUN1 ISUN0 ITXA72 ITXB6 TTXA65 TTXB66 TNAP80 TAB66 MSEP0 MCON53 SMA111 SMB65 MRXA2 MRXB2 RS30 US163 IBS20 USUN1 ISUN0 ITXA6 ITXB6 TTXA65 TTXB66 TNAP80 TAB66 MSEP0 MCON53 SMA120 SMB64 MRXA2 MRXB2 RS30

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DirecWav satellite internet useful?
by Greg D. 27 May '08

27 May '08

Hi folks, My neighbor appears to be tossing their Hughes "DirecWav" satellite internet dish and associated dish-mounted electronics. By any stroke of luck, is this stuff reasonably convertable for use with any of the the proposed P3E up or downlinks? I have no idea what frequency it runs. It appears to have both transmit and receive capabilities (based on the warnings posted). There are no model numbers that I can find on the electronics. I've got my AO-40 S-band receive setup, but nothing for the higher bands. Thanks, Greg KO6TH _________________________________________________________________ E-mail for the greater good. Join the i’m Initiative from Microsoft. http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ GreaterGood

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Re: Newbie question Icom 910H & LEO antennas
by John Kopala 26 May '08

26 May '08

Jim, The Icom IC-910H is a great rig. I use it all the time for the satellites and have worked AO-51, AO-27, SO-50, AO-07, VO-52, and AO-16 without any problems. I can't imagine what the complaint on EHam was all about, but no matter what the rig, or anything else for that matter, there always seems to be some disgruntled purchaser out there. Some of the complaints I've seen are based more on the knowledge of the user (or lack thereof) than the capabilities of the radio. The FT-736 is a good rig with 25 watts per band. With a good antenna system, that should be adequate for most, if not all, satellites. The IC-910H provides continuously variable output from 5 watts to 100 on 2 meters and 5 to 75 on 70 cm - more that you should ever need. I use SATPC32 for doppler control, but I think that the FT-736 is also compatible, so no big deal there. One very nice feature of the IC-910H is the ability to power compatible preamps through the coax with just a button push on the radio. The main difference is that the IC-910H is currently in production and is a fairly compact package, whereas the FT-736 is discontinued and is big and bulky. Overall, I think you will really like the IC-910H. The radio does have a learning curve, so DON'T lose the manual. You will be refering to it many times. I've been using mine for less than a year and really like it. It also does NOT have the birdie on 436.8 that wipes out the downlink on SO-50 and AO-27 on the TS-2000, depending upon the amount of doppler shift. John N7JK - - - - - - - - - - Date: Mon, 26 May 2008 11:26:00 -0400 From: "Jim Danehy" <jdanehy(a)cinci.rr.com> Subject: [amsat-bb] newbie question Icom 910H & LEO antennas Although licensed for 55 years + , I am just now an SWL on the birds. I did Oscar 6 in ~ 1975. Having worked and confirmed all of the DXCC countries and just recently retired, the birds have my interest. I have plenty of 1/2 inch and 7/8 inch hardline and connectors as well as a Kenpro G 500 elevation rotor. I have an Elecraft K2 with their transverter and a Microwave Module with satellite capability for 435. Just need some antennas. I am also thinking of getting a more modern rig and the Icom 910 caught my eye. A friend of mine has a Yaseu 736 which he will sell me with 2 and 440 modules. No price discussed yet but I thought $700 would be my top. As an alternative I thought about the Icom 910H. The only concern was a comment I read on EHam that it was not user friendly on the FM birds being more friendly to the JA birds. Is the 910 capable of doing AO 51 OK or is it a pain ? Often information can be misleading. This is my first post here on the BB. If there is any bird oper! ator close to Cincinnati, Ohio , I would love to visit your station. I do have the old style Mirage bricks for 2 and 432 too. I thought of Egg beaters from M Square but now leaning more toward the 10 foot long circular yagis for 2 and 432. Any info or comments would be greatly appreciated. Hope to QSO many of you soon. 73 Jim W9VNE

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ISS digi active?
by Alan P. Biddle 26 May '08

26 May '08

Any info on whether the ISS APRS digi is active? And is there a solid current source of that info? I have found some sites with general info, but due to activities on the ISS, they seem to make changes with fair frequency. I have a newbie who is anxiously listening on each pass, but so far nothing hear. Alan WA4SCA ----------------------------------- It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. Sherlock Homes

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