May 2015 - AMSAT-BB - mailman.amsat.org

More PSAT frames
by Timo 22 May '15

22 May '15

Fm PSAT-1 To APOFF Via ARISS <UI pid=F0 Len=52 >[10:06:39] s#001617,0z200,FbGDAG0BHBaHEbHCAH0AHBaHDbGCBH0AHCbH Fm PSAT-1 To APOFF Via ARISS <UI pid=F0 Len=34 >[10:07:09] T#376,795,352,494,836,863,00011100 Fm PSAT-1 To APOFF Via ARISS <UI pid=F0 Len=34 >[11:45:36] T#473,807,354,509,867,888,00011100 Timo, PE1NTN

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Re: [amsat-bb] PSAT Spin Data reported! now plotted!
by Robert Bruninga 22 May '15

22 May '15

Spin Data Plotted! 3 RPM perfectly about Z as induced by differential radiative pressure. See plot: http://aprs.org/psat.html Now to see if it keeps spinning higher or has achieved equilibrium with eddy current damping… Bob, WB4APR *From:* Robert Bruninga [mailto:[email protected]] *Sent:* Friday, May 22, 2015 9:56 AM *To:* amsat-bb(a)amsat.org *Cc:* bruninga(a)usna.edu; kang(a)usna.edu *Subject:* PSAT Spin Data reported! Got good Spin packets from J Finally Got spin data from JA0CAW And PY2SDR! Since we have not yet written any decode software, we will be manually processing these. The format is OOOOmm,0z200,XYZXYZXYZXYZXYZXYZ…..XYZ Where OOOO is the orbit number and mm is the MINUTE (0-to-95) into the orbit. 0z200 is status, ill do later… Tha Alphabet soup is the sun vector data over the last minute! In this case, every 5 seconds, Where the XYZ are the values of the XYZ sun vector. CAPITAL letters are from +1 to +26 and lower case letters are from -1 to -26 This 4th packet below shows the satellite just coming into sun. What an amazing coincidence [07:49:06R] s#001156,0z200,hCIifHHfIIGHgFHdfIIcHEHHgDIBgIJ0HBHH s#001157,0z200,gCIeeIHeIJFHdEIAfJIbIFGHeAJDfJJ0HCHH s#001160,0z200,fbIdfIHcICFIfAIafHH0I0GHfaHCfIIBHaGH s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK Make a scale going positive from 0 to Z and negative from 0 to –z. Then for each XYZ set, plot the three points. Then connect the X’s and the Y’s and the Z’s and we should see a pattern of rotation! Im starting now. By tte time I finish, a good programmer might beat me to it! Bob, WB4APR

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HELP WITH SATPC32
by KE6PPE＠aol.com 22 May '15

22 May '15

My old computer crashed and I'm installing on a new machine. OS 8.1 .When I start the program it come up with { OLE-Fehler 8004503A, Class ID: ( A5584957-EF07-419C-BACD-9931F1256D92} , ) . When I click ok it comes up with { OLE-Fehler 8004503A, Class ID: ( A5584957-EF07-419C-BACD-9931F1256D92}. What does this mean? Larry KE6PPE

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PSAT Spin Data reported!
by Robert Bruninga 22 May '15

22 May '15

Got good Spin packets from J Finally Got spin data from JA0CAW And PY2SDR! Since we have not yet written any decode software, we will be manually processing these. The format is OOOOmm,0z200,XYZXYZXYZXYZXYZXYZ…..XYZ Where OOOO is the orbit number and mm is the MINUTE (0-to-95) into the orbit. 0z200 is status, ill do later… Tha Alphabet soup is the sun vector data over the last minute! In this case, every 5 seconds, Where the XYZ are the values of the XYZ sun vector. CAPITAL letters are from +1 to +26 and lower case letters are from -1 to -26 This 4th packet below shows the satellite just coming into sun. What an amazing coincidence [07:49:06R] s#001156,0z200,hCIifHHfIIGHgFHdfIIcHEHHgDIBgIJ0HBHH s#001157,0z200,gCIeeIHeIJFHdEIAfJIbIFGHeAJDfJJ0HCHH s#001160,0z200,fbIdfIHcICFIfAIafHH0I0GHfaHCfIIBHaGH s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK Make a scale going positive from 0 to Z and negative from 0 to –z. Then for each XYZ set, plot the three points. Then connect the X’s and the Y’s and the Z’s and we should see a pattern of rotation! Im starting now. By tte time I finish, a good programmer might beat me to it! Bob, WB4APR

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Beijing may launch amateur satellites in July inc Linear Transponder
by M5AKA 22 May '15

22 May '15

Beijing may launch amateur satellites in July. One report says 20 CubeSats ? http://amsat-uk.org/2015/05/22/beijing-satellites/ 73 Trevor M5AKA ---- AMSAT-UK http://amsat-uk.org/ Twitter https://twitter.com/AmsatUK Facebook https://facebook.com/AmsatUK ----

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PSat Frames
by Edson W. R. Pereira 22 May '15

22 May '15

Received during the night @ GG56 PSAT-1/ARISS>APOFF>UI,?,F0: s#001532,0z200,00000000000000000AaABcdDKhJLIMkEMilK PSAT-1/ARISS>APOFF>UI,?,F0: T#254,836,089,888,915,835,00011100 PSAT-1/ARISS>APOFF>UI,?,F0: s#001533,0z200,LkKN0MbJMlhLHlKN0MdJMliLHlLMBMjJMmiK PSAT-1/ARISS>APOFF>UI,?,F0: T#256,861,074,788,914,838,00011100 73, Edson PY2SDR --- - We humans have the capability to do amazing things if we work together. - Nós seres humanos temos a capacidade de fazer coisas incríveis se trabalharmos juntos.

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Error just started with SpaceTrack TLE Retriever 3
by Rick Walter 21 May '15

21 May '15

I usually update my Keplerian elements to track the birds with T.S. Kelso's SpaceTrack TLE Retriever 3, stand alone Windows program. It has worked flawlessly for many years on my laptops running XP and Windows 7. Starting this week, I get an error on all three computers. The program downloads the master lists fine but when I click the button to parse them out and check for errors, I immediately get "Unhandled exception has occurred in your application Spacetrak .... Index and length must refer to a location within the string parameter name length. I am using version 3.0.1.3 (2013Jul17) and even upgraded on one computer to version 3.0.1.5 (2014 Dec18). I sent an email to T.S. Kelso and attached a debug file but have not heard anything in several days. Any one have the same problem or know of a fix? Thank you. Rick WB3CSY Sent from Rick's iPad2

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Re: [amsat-bb] Receiving PSAT PSK31 FM downlink
by Rick Tejera 21 May '15

21 May '15

Sent from my Verizon Wireless 4G LTE smartphone -------- Original message -------- From: Robert Bruninga <bruninga(a)usna.edu> Date: 05/21/2015 16:19 (GMT-07:00) To: amsat-bb(a)amsat.org Subject: [amsat-bb] Receiving PSAT PSK31 FM downlink Receiving the PSAT (and BRICsat) 435.350 MHz FM downlink is as simple as placing your PSK31 laptop microphone next to the speaker on your FM satellite UHF receiver and just watching the waterfall. What you see is exactly what everyone else sees (its FM). There is no Doppler added to the tones due to your station's position relative to the satellite. But you DO have to retune your FM radio at least 3 times during the pass (+5 KHz, 0, -5 KHz) to stay in the FM passband. User uplinks, however, will shift in the waterfall according to each user's position relative to the satellite. The shift can be as low as 1 Hz per second to as high as 6 Hz per second. This is because the uplink is on 10 meters where the Doppler rate is only 1/15th of what it would be on UHF. The TELEMETRY channel at 315 Hz (PSAT) or 375 Hz (BRICsat) is FIXED with no Doppler since it is generated onboard into the FM downlink WHAT TO DO: 1) We will need PSK31 authors to open the PSK31 frequency tracking to accommodate more than 1 Hz per second Doppler tracking. Current implementations can do 1 Hz/s but completely fail at 3 Hz/s. 2 Hz/s might work a little... 2) Until then, ANY uplink user that is in line with a direct overhead pass will have minimum Doppler at the start and end of his pass (1 Hz/sec) when the satellite is going right at him and directly away from him. (Though it will be MAX (6Hz/sec) when it passes over his station). 3) Just turn on MULTI CHANNEL window and let the PSK31 decode everyone. The ones with the least Doppler at any instant may be decoded for a while! USERS can transmit later when BRNO University says it has completed its tests. Brno provided the transponders for use in the PSAT and BRICsat satellites. So start preparing your station to TX PSK31 on 10 meters SSB and to receive the audio from an FM UHF rig on 435.350 +/- 5 KHz steps of Doppler. DOWNLINK Limitations: The UHF downlink signal is only 300 mW and so a UHF beam is needed on the downlink. UPLINK RESTRICTIONS: *NOTHING MORE THAN* a Vertical 1/4 wave or Dipole is authorized on the 10m uplink and no more than 25 Watts (for now). Remember a 1/4 wave vertical is the ideal antenna because it maximizes the signal at lower angles and tapers the signal as the satellite gets closer. This keeps user uplinks about the same during a pass. Strong stations just drive down the AGC and ruin it for everyone. Use minimum power!! Remember, this is crossband FULL DUPLEX so you can see yourself in the downlink just like everyone else can see you. Act accordingly. And of course DO NOT TRANSMIT if you cannot see the waterfall ... Duh! Enjoy! Bob, WB4APR _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

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USNA Sat Status (day 2)
by Robert Bruninga 21 May '15

21 May '15

We now have heard 4 of 5 transmitters from our 3 spacecraft all still in a close cluster: * PSAT packet is OK but WOD not working (no digipeating for users yet) * PSAT PSK31 downlink is ok [remember, it is FM!] * BRICSAT telemetry has been heard but is cycling OFF due to low power * BRICSAT PSK31 downlink (also FM) has also been heard barely (when ON) * USS Langley not heard PSAT CPU shows the 4 day-fail-safe backup reset circuit is not counting down, so we have lost this (1 of 3) fail safe backup RESET capabilities. Bad line of code already found. But cannot change it. PSAT is not properly reporting WOD data and S#... STATUS packets are being bundled until 255 byte packet length is reached and then it all comes down at once. Noone has captured any of these long packets. Please try with PASSALL ON so that you can receive partial packets. Awaiting permission from BRNO University to authorize HF user uplinks on PSAT PSK31. BRICSAT PSK31 transponder is on identical frequencies as PSAT's. You can tell them apart because one has PSK Telemetry on 315 Hz and the other is on 365 Hz. Both on the UHF FM downlink 435.350 MHz We'd LOVE to hear from USS Langley, and we'd love to capture one of those long WOD packets from PSAT. Our ground station is only getting a few packets compared to some submissions from others. Keep it up. SUMMARY: 145.825 1.5U cubesat - PSAT 1200 baud AX.25 435.350 same cubesat - PSAT PSK31 FM - Brno University transponder 437.975 1.5U cubesat - BRICsat 9600 baud 435.350 same cubesat - BRICsat PSK31 FM - Brno University transponder 437.975 3.0U cubesat - USS Langley 9600 bd <not yet heard from> ULTRASat3 1 99993U 15140.67013889 .00040043 00000-0 10235-2 0 00009 2 99993 055.0004 339.9238 0251027 182.3314 074.3075 15.12517086000014 Bob, WB4APR

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AGW Packet, UISS with TS-2000
by Ted 21 May '15

21 May '15

Anyone successfully using the built-in TNC in KW TS-2000 with AGW Packet engine. Unsure what to select in the drop down for TNC Make. Any help appreciated 73, Ted K7TRK

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