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

Re: [amsat-bb] Noise, distortion and fading on AO-92 L/v downlink
by Ronald G. Parsons 24 Dec '18

24 Dec '18

Although not from L/v, here is a link to a screen shot of the AO-92 U/v downlink fading. https://drive.google.com/file/d/1DamiFLH6pi4IJxk3zU2gMz5za0oFCGxg/view?usp=… The time scale of the downlink waterfall is on the right in minutes. At TCA, around 5 min, the fades fill in but toward the end of the pass, 0 to 3 min, the fades are rapid, about three per min. This does not happen with all sats, so I don’t think it is a local effect at my station. Spinning of the sat? Ron W5RKN

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Re: [amsat-bb] Noise, distortion and fading on AO-92 L/v downlink
by Ronald G. Parsons 24 Dec '18

24 Dec '18

To my ear, the L/v downlink just “sounds” more distorted and noisier than the U/v downlink. Perhaps something is coming in the L port or is internally generated. The downlink path in my radio is identical in L/v and U/v. The rapid fading last weekend was very noticeable at lower elevations and was close to a 30 sec period. At higher elevations, it was not noticeable. I’ll try to remember to screen capture the downlink waterfall next weekend. Ron W5RKN

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Re: [amsat-bb] Noise, distortion and fading on AO-92 L/v downlink
by Ronald G. Parsons 24 Dec '18

24 Dec '18

Paul, Those are good thoughts. The “radar” noise is distinct and was not my concern. Ron W5RKN

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Upcoming ARISS Contact Schedule as of 2018-12-24 15:00 UTC
by aj9n＠aol.com 24 Dec '18

24 Dec '18

Upcoming ARISS Contact Schedule as of 2018-12-24 15:00 UTC Quick list of scheduled contacts and events: Next contact is expected to be scheduled sometime during the week of 2019-01-07. (***) ARISS Contact Applications (United States) The ARISS-US program’s education proposal window open Oct. 1 - Nov. 30, 2018 has now closed. The next window should go open in the spring of 2019. The ARISS webpage is at http://www.ariss.org/ Note that there are links to other ARISS websites from this site. ARISS Contact Applications (Europe, Africa and the Middle East) Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April. Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia) Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator. For the application, click here. ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD ARISS-Japan, Asia, Pacific and Australia: Keigo Komuro, JA1KAB, Japan Amateur Radio League (JARL) ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) ****************************************************************************** ARISS is always glad to receive listener reports for the above contacts. ARISS thanks everyone in advance for their assistance. Feel free to send your reports to aj9n(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz. ******************************************************************************* All ARISS contacts are made via the Kenwood radio unless otherwise noted. ******************************************************************************* Several of you have sent me emails asking about the RAC ARISS website and not being able to get in. That has now been changed to http://www.ariss.org/ Note that there are links to other ARISS websites from this site. **************************************************************************** Looking for something new to do? How about receiving DATV from the ISS? If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net **************************************************************************** ARISS congratulations the following mentors who have now mentored over 100 schools: Satoshi 7M3TJZ with 135 Francesco IKØWGF with 132 Gaston ON4WF with 123 Sergey RV3DR with 108 **************************************************************************** The webpages listed below were all reviewed for accuracy. Out of date webpages were removed, and new ones have been added. If there are additional ARISS websites I need to know about, please let me know. Note, all times are approximate. It is recommended that you do your own orbital prediction or start listening about 10 minutes before the listed time. All dates and times listed follow International Standard ISO 8601 date and time format YYYY-MM-DD HH:MM:SS The complete schedule page has been updated as of 2018-12-24 15:00 UTC. (***) Here you will find a listing of all scheduled school contacts, and questions, other ISS related websites, IRLP and Echolink websites, and instructions for any contact that may be streamed live. http://www.amsat.org/amsat/ariss/news/arissnews.rtf http://www.amsat.org/amsat/ariss/news/arissnews.txt Total number of ARISS ISS to earth school events is 1285. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1228. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 47. A complete year by year breakdown of the contacts may be found in the file. http://www.amsat.org/amsat/ariss/news/arissnews.rtf Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: South Dakota, Wyoming, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: http://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** The successful school list has been updated as of 2018-12-14 18:00 UTC. http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction .rtf Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC. http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 58 on orbit Oleg Konenenko David St-Jacques KG5FYI Anne McClain **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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Re: [amsat-bb] Noise, distortion and fading on AO-92 L/v downlink
by Paul Stoetzer 24 Dec '18

24 Dec '18

I was not on this particular pass, but I have heard these noises before and do believe it to be L band radar interference. 73, Paul, N8HM On Mon, Dec 24, 2018 at 08:03 Mark L. Hammond <marklhammond(a)gmail.com> wrote: > FWIW, I was on the pass with Ron. I'll confirm his observations, although > I can't explain them ;) On some of the uplinks (but not all!) it sounded > like the 70cm "radar" noise, sort of. Jeff KB2M even commented the same. > > Anyhow, we'll have more opportunities with future L/v sessions on AO-92 > and can see if it happens again... > > Mark N8MH > > At 11:18 PM 12/23/2018 -0600, Jerry Buxton wrote: > >Hi Ron, The downlink is the same radio as the U/v, so from that > perspective there is no particular reason that the L/v transmit signal > would be different. The L/v uplink passes through a downconverter with an > output of the same U frequency as the U/v uplink, directly into the > receiver. If there was any distortion to the L/v signal it would likely > occur in the downconverter path, but I haven't heard any other reports of > problems. The first thing that comes to mind for rapid fading is satellite > spin, I do not have any telemetry in front of me but if you check that out > on FoxTelem or the website to see if it is spinning faster than last week, > that might be a contributor. Noise then, if the satellite downconverter is > working correctly, is probably on the uplink signals and may be greater > than normal with the rapid fading. Jerry Buxton, NÃ˜JY On 12/23/2018 19:46, > Ronald G. Parsons wrote: > Last night AO-92 L/v downlink seemed at times > unusually noisy and distorted with rapid fading. Other I talked to on other > sats and one ham in ZL land also mentioned it. I have not noticed this on > AO-92 U/v, at least to this extent. My imagination or fact? > > Ron W5RKN > > _______________________________________________ > 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 > _______________________________________________ > 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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Es'hail-2 active?
by Andy Brian 24 Dec '18

24 Dec '18

Hi, is the Es'hail-2 active now? I heard something on 10.489GHz last night. BR Andy

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Noise, distortion and fading on AO-92 L/v downlink
by Ronald G. Parsons 24 Dec '18

24 Dec '18

Last night AO-92 L/v downlink seemed at times unusually noisy and distorted with rapid fading. Other I talked to on other sats and one ham in ZL land also mentioned it. I have not noticed this on AO-92 U/v, at least to this extent. My imagination or fact? Ron W5RKN

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Antennas For Sale
by Roger - W7TZ 24 Dec '18

24 Dec '18

Homebrew- 145mhz 10el CP yagi, 435mhz 24el CP yagi. Fiberglass booms. EZNEC models available. Asking $175 for the pair, pickup only. 73, Roger W7TZ CN83ia Grid Busters w7tz.webs.com

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Amsat.org Telemetry Server Down
by Chris Thompson 23 Dec '18

23 Dec '18

Service will resume once we work out why we have run out of inodes. Telemetry will queue upstream and be sent once the server is up again. Happy Holidays all, 73 Chris G0KLA / AC2CZ -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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Flex 6600 and 1k2 BPSK decoding
by Ross Biggar 23 Dec '18

23 Dec '18

I have been very successfully downloading and decoding quite a number of satellites using 4k8 and 9k6 GMSK and FSK. But for some reason I cannot decode the 1k2 bpsk from any satellite. Can someone please enlighten me as to what software you used to decode the telemetry, it would need to have been decoded on a Flexradio, not an RTL sdr using different software. Thanks Ross ZL1WN

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