July 2019 - AMSAT-BB - mailman.amsat.org

Re: [amsat-bb] DopplerPSK and linux
by Roy Dean 13 Jul '19

13 Jul '19

Are you trying to run that from the command line, or by clicking on it in > the GUI? Tried both. Double clicking results in about 2 seconds of the mouse pointer turning into the ubuntu "busy" pointer, then nothing. Running from command line "java DopplerPSK.jar" results in the one line error. > Have you marked the .jar file as executable? looks ok: -rwxrwxr-x 1 dean dean 120002 Sep 19 2015 DopplerPSK.jar > Is the JAVA runtime installed on that PC? ( javac -version ) java version "1.8.0_201" Ok, having written all that, it dawned upon me that AC2CZ's FoxTelem runs perfectly and is also a .jar, so I inspected his "foxtelem" start script to see how he starts FoxTelem. His command line is "java -jar FoxTelem.jar" - I wasn't using the "-jar" part. DUH. Just tried it with the following terminal command and it started!! "java -jar DopplerPSK.jar" Just another case of "OE" -> operator error. --Roy K3RLD

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EN87 today
by aa8ch 13 Jul '19

13 Jul '19

Hi! If you are in need of EN87, look for AA8CH/VE3 on FM/linear satellites this afternoon local. QSL to LOTW as always. 73, Chris AA8CH

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DopplerPSK and linux
by Roy Dean 13 Jul '19

13 Jul '19

I get the following error when attempting to run DopplerPSK on Ubuntu: Error: Could not find or load main class DopplerPSK.jar Any clue as to what I may be missing? --Roy K3RLD

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No signal from FO 29
by Robert Hynd 12 Jul '19

12 Jul '19

Did not hear beacon and no signals thru the transponder.... not good. Bob N5URL Sent from my iPhone

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Need two Virginia APRS rovers next Saturday!
by Robert Bruninga 12 Jul '19

12 Jul '19

AMSAT Rovers: We desperately need 2 APRS Mountaintop weekenders for 4 hours on Saturday 20 July for the Annual APRS Golden Packet event from Maine to Georgia along the Appalachians. Goal is APRS messages the full length and into Canada. One needed station is in SW Virginia on top of Comers Rock near Wythville, VA and one in Northern Va on Hawksbill Mountain east of Harrisonville, VA. All of the other 15 mountains are signed up. It is a 4 hour event 11 AM to 3 PM. Both of these sites are drive-up except for the last hundred yards or so to the best operating position. http://aprs.org/hamtrails/comers-rock.html http://aprs.org/hamtrails/hawksbill.html Prove your APRS stuff! And enjoy the view and drive! Full event details: http://aprs.org/at-golden-packet.html PLUS, we will attempt PSAT2 relay on 3 passes during the event. All others hold off please. Contact me. Bruninga at usna dot edu Bob, WB4APR

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PSAT2 auto-reset
by Robert Bruninga 12 Jul '19

12 Jul '19

Sorry, PSAT2 auto-reset back to safe mode because we did not get the "we're still here" command uplinked in time. Only modes available are PSK31 and SSTV. We will try to restore normal operation on the next several orbits. Normal mode should show status bits of 01000111. Which has PSK31, SSTV, plus Digipeating plus APRS-to-Voice http://aprs.org/psat2.html Bob, Wb4aPR

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K0FFY in Iceland July 13-19
by Adam Whitney 12 Jul '19

12 Jul '19

I am taking my family (and my radios) to Iceland. I’ll be staying in HP95 on July 13, IP15 on July 14-15, IP25 on July 16, IP03 on July 17-18, and HP94 on July 19. In total, I’ll be passing through HP93, HP94, HP95, IP03, IP05, IP13, IP14, IP15, IP24, IP25, IP35. There’s a lot to see, so passes will be best effort holiday-style & I’ll attempt to announce on Twitter shortly prior. https://twitter.com/K0FFY_Radio

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RF noise from a passing-by BMW i3
by Zach Metzinger 12 Jul '19

12 Jul '19

For those of you considering operating around electric vehicles, beware of the copious noise emitted by the BMW i3. I was sitting in a parking lot, engine off, operating mobile on 10m during the recent band openings. Rather abruptly, the band's noise floor increased to mid-scale on the S-meter. I briefly wondered if propagation had suddenly changed, and then I noticed a BMW i3 pass behind me and leave the lot. The noise left as well... I was back to a nice quiet band floor. I didn't have time to switch over to 2m/70cm SSB and see how far up the racket extended. I stumbled across an article relating much of the same, today. https://www.greencarreports.com/news/1098893_bmw-i3-electric-car-quirk-no-a… So, save the planet or save the spectrum. Perhaps not both at the same time? :-) --- Zach N0ZGO

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HT Radio
by Corlissbs 12 Jul '19

12 Jul '19

Kees, the Kenwood TH-D72A does SO-50; very well. I know it is expensive, but you get what you pay for. It will also send and receive packets to and from the birds, which I am learning to do. You have a great signal on the birds. If you ever get a D72, I will help you set it up and learn to operate it. I love mine. Brad Smith KC9UQR Sent from Brad’s iPad

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AO-92 in Camera Mode
by Chris Thompson 11 Jul '19

11 Jul '19

For anyone decoding images and using FoxTelem with Doppler Tracking enabled I would appreciate any feedback on how high speed data is being decoded. Especially if you decoded camera frames in previous runs, like last October, and can compare. This was a new feature and previously tracking of the high speed signal was not great. Let me know if it is better (or worse!) 73 Chris -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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