December 2018 - AMSAT-BB - mailman.amsat.org

FW: Doppler file
by Ted Krempa 20 Dec '18

20 Dec '18

Hello, can anyone else answer my question below.....(Joanne must be busy) Thanks, Ted K7TRK -----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Ted Krempa Sent: Monday, December 17, 2018 3:49 PM To: 'JoAnne Maenpaa'; 'Dave' Cc: amsat-bb(a)amsat.org Subject: Re: [amsat-bb] Dobbler file Good stuff, Joanne...thanks One thing, though, that I have never understood, however: Does SatPC32 properly update keps and the sqf data when the 'update' option is used in the program? Or do we need to keep updating manually. I can understand with a new sat, manually trying to find the right data, but after the sats are rolling along for a few weeks the normal sites that identify keps usually have that data current. Thanks for any input 73, Ted K7TRK -----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of JoAnne Maenpaa Sent: Monday, December 17, 2018 5:54 AM To: 'Dave' Cc: amsat-bb(a)amsat.org Subject: Re: [amsat-bb] Dobbler file Perhaps these messages from the amsat-bb from a few weeks ago might offer a starting point? https://www.amsat.org/pipermail/amsat-bb/2018-October/069839.html https://www.amsat.org/pipermail/amsat-bb/2018-November/070451.html -- 73 de JoAnne K9JKM k9jkm(a)amsat.org > -----Original Message----- > From: AMSAT-BB [mailto:[email protected]] On Behalf Of Dave > Sent: Monday, December 17, 2018 7:40 AM > To: James McIrvin > Cc: amsat-bb(a)amsat.org > Subject: Re: [amsat-bb] Dobbler file > > I’m not sure if you received a private response but I have a similar issue. > I tried to use SatPC32 the other day and found many of the satellite > frequencies were not correct. I’m going to have manually edit a bunch of > them unless I can find someone with a good set of files. > > Dave > N2OA _______________________________________________ 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 _______________________________________________ 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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AO-85 update
by Andrew Glasbrenner 20 Dec '18

20 Dec '18

All, As you probably know, AO-85 has had issues recently with the batteries dropping precariously low during eclipse. We think it's likely the batteries suffered degradation due to heat during previous periods of no eclipses. This has made it difficult to keep the satellite available for use without endangering the batteries. Today the nominally 3.6v pack was down to 2.8v at the end of the eclipse. That is dangerously low. In an effort to extend the useable life of the satellite, this evening we turned both the IHU and the transmitter off. This ceases all transmissions, including the beacons every two minutes in both sunlit and eclipsed parts of the orbit. We will periodically turn the satellite back on for an orbit or two, in order to gather telemetry. If all goes as planned, we will turn the repeater back on during the next period of no eclipses beginning around January 24th. In the meantime, it is important to leave AO-85 tracked in your FoxTelem setups, in order for us to gather telemetry and keep tabs on the situation. If you do happen to hear a Veronica beacon, or either the normal repeater or the COR/no telemetry repeater, please let the list know, or send me an email or message directly. We appreciate your understanding and cooperation as we try to make the most of the situation. Please consider supporting the AMSAT GOLF project with your membership, and one-time or recurring donations at https://www.amsat.org/product-category/amsat-membership/ or https://www.amsat.org/donate/ 73, Drew KO4MA AMSAT VP Operations

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Yaesu G-5500 Control Interface
by Carlos Cardon 20 Dec '18

20 Dec '18

I have used the EA4TX USB controller for a couple of years with excellent results! Early on, I discovered a bug in the firmware. Pablo had it corrected and an update to me within less than an hour, absolutely amazing! Not a single issue since then. Highly recommended. Carlos W7QL

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sdr receiver
by James Brown 20 Dec '18

20 Dec '18

I am thinking of upgrading the station by removing the ft817 as downlink receiver and going to SDR receiver. Looking for best data to get started and choice of SDR unit to use. Open to hearing pro and con! Also interested in raspberry pi plus SDR to do the job. I have no experience with raspberry but appears to becoming popular. Can SATpc 32 control a sdr as it would any transceiver? Jim

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controller for g5500
by James Brown 19 Dec '18

19 Dec '18

What choices are there for G5500 rotator control via USB? Recently tried ERC M but it failed and support is poor! Jim

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Sell
by WCP 19 Dec '18

19 Dec '18

Before I list on Ebay: FT736R with 1.2 GHz, 220MHz,UHF and VHF MC2 UHF 436CP30 , VHF 2MCP14, 1.2GHz Direct System 24454 antenna G5500 with fiberglass boom LVB tracker KJ6KO 1.2GHz 70 Watt Amp with Power supply Would like to sell as one. Contact Off list KA9ERV(a)arrl.net Would be local pickup in Northern Indiana

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New wiki page on Yaesu G-5500 rotator controller computer interfaces
by John Brier 19 Dec '18

19 Dec '18

Since this question comes up frequently I made a page with a list of interfaces. It's a first draft and more info could be added. If you want to edit the wiki create an account on wikidot and let me know you username/email address and I'll add you as an editor. http://sats.wikidot.com/what-yaesu-g-5550-rotor-computer-interfaces-are-the… 73, John Brier KG4AKV

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Re: [amsat-bb] controller for g5500
by aj9n＠aol.com 19 Dec '18

19 Dec '18

You could use the Labjack U12 and piggyback. The piggyback will need to be built; there is a schematic in the SatPC32 files. The piggyback would cost maybe $15 and the U12 about $150. 73,Charlie AJ9NOne of the ARISS mentors In a message dated 2018-12-19 12:39:57 Eastern Standard Time, jimki6wj(a)sbcglobal.net writes: What choices are there for G5500 rotator control via USB? Recently tried ERC M but it failed and support is poor! Jim_______________________________________________Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum availableto all interested persons worldwide without requiring membership. Opinions expressedare 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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Cheap rotator setup
by Eli Caul 19 Dec '18

19 Dec '18

Hi folks - In my ongoing effort to figure out how to use the SSB satellites, I duplicated this setup over the weekend: http://k3rrr.com/cheap-computer-controlled-tv-rotor-for-amsat-satellites-an… I bought a list of materials based on the photograph, and it didn’t occur to me that the PVC parts pictured put the antennas at approximately 45 degrees and not the recommended 15 degrees. Has anyone done this setup? If so, how did you assemble it so that the antennas ended up at the recommended angle? There were a couple of higher angle passes yesterday (one was at 50 degrees) but so far I haven’t been able to 'loop' the satellite. I'm using a Yaesu FT-991A for uplink and an Airspy SDR on the downlink. Advice appreciated. So far I've gotten some excellent advice from AMSAT members and I really appreciate the groups level of expertise and patience with my fundamental questions. 73 de KK6ZHZ, - Eli Caul Director of Customer Care Sonic 707-237-6201 Direct 707-521-0131 Faxline - Eli Caul Director of Customer Care Sonic 707-237-6201 Direct 707-521-0131 Faxline

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Re: [amsat-bb] AO-95 Rx problem
by Mac A. Cody 19 Dec '18

19 Dec '18

Interesting! Didn't know that data was available on line. Is there a more detailed presentation of the data in, say, a spreadsheet for a greater period of time than what is presented? This would be very helpful in performing any detailed analysis. Is all of the telemetry presented on the web page? All data would be valuable in trying to make any correlations. Where in the receive chain is the RSSI measured? Has an attempt been made yet to transmit a strong signal (modulated or unmodulated) during an overhead pass to try to 'nudge the needle' on the RSSI meter? Perhaps successively stronger transmissions could be made to see at what power level any change occurs in the RSSI without applying too much power. I recall someone mentioning approaching an EME operator to attempt transmitting at AO-95 with significantly more power than normal. Why does the 'Battery I32C' indicate 'FAIL' (although I see that this is the same for the other FOX satellites)? 73, Mac Cody / AE5PH On 12/17/18 1:02 PM, H. Stephen Nipper wrote: > Mac, you can look at the data coming down from the satellite and maybe > answer some of the questions that you asked. To my untrained eye it > appears that the solar panels are all working. I am sure that the > team understands that data and what it means more than me. > > http://www.amsat.org/tlm/health.php?id=3&port= > > So if you look at RSSI line you can see the receiver. Click on it. > It's flat line. > http://www.amsat.org/tlm/graph.php?sat=3&field=RSSI&raw=conv&reset=0&uptime… > > On Mon, Dec 17, 2018 at 10:30 AM Mac A. Cody <maccody(a)att.net > <mailto:[email protected]>> wrote: > > I'm sure that this is being considered, but I'll extend the > thought anyway: > If there has been a collision that may have damaged or sheared off the > RX antenna, could other damage have occurred that might be > identifiable > via telemetry? What I'm thinking of is possible damage to one or more > solar cells. Would damage, perhaps resulting is reduced current flow > or voltage levels, be discernible through the telemetry? Are > there other > items of the surface of AO-95 that, if damaged, might reveal that > damage > through telemetry. > > Thanks to all the volunteers that have worked so hard to make the FOX > series an outstanding success! > > 73, > > Mac Cody / AE5PH > > > On 12/16/18 10:48 PM, Jerry Buxton wrote: > > Hi Francis, > > > > That is one thing we are looking into, handily I am well > acquainted with > > the ExseedSat team lead and since we were in the deployer next > to each > > other and performing the integration together we have discussed the > > possibility that we got to be too close friends somehow and are > still > > that way or perhaps remained too close even to the point of antenna > > deploy and perhaps interfered with each other's deploy. TLE > indicated > > separation is perhaps the only way to guesstimate that though. > If it > > gives us something to maybe model or relate to past missions, we > might > > be able to infer that a possible cause was that we may have been > close > > for a while up to and including our antenna deploy times and > something > > may have happened as a result of that. It would at least > provide one > > possible path to follow in looking for causes and maybe (and I mean > > MAYBE) a solution. > > Keep on watching for clues, thanks! > > > > Jerry Buxton, NØJY > > > > On 12/16/2018 15:30, Francis Geraci wrote: > >> First off, I do not want to "2nd guess" the Engineering team. > >> > >> JUst read the "post" that AO-95 was still very close to another > "object". > >> > >> I just was wondering, if AO-95 is TOO close to another > "object", maybe > >> "object" is "blocking" the RX antenna, or did RX antenna get > "knocked" off ? > >> > >> Opinions ? Everybody has them. HiHi > >> > >> Francis - W1FXX > >> _______________________________________________ > >> Sent via AMSAT-BB(a)amsat.org <mailto:[email protected]>. > 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 > >> > >> > > _______________________________________________ > > Sent via AMSAT-BB(a)amsat.org <mailto:[email protected]>. > 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 > > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org <mailto:[email protected]>. 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 > > > > -- > Stephen Nipper > Boise, Idaho > N7DJX > >

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