October 2017 - AMSAT-BB - mailman.amsat.org

Falconsat-3 Test 2 - Signalink USB Sound Card 9k6
by Andrew Rich 12 Oct '17

12 Oct '17

ICOM 910H 9k6 ON Signalink with UZ7HO sound modem FSM G3RUH 9600 baud Elevation 89.4 degrees MacDoppler correction 435.112 MHz to 435.xxx MHz No Packets copied 435.112 MHz Start heard a change in static I am not convinced the SignalLink can do it I am going to move across to a my FunCube Dongle and use Software Defined Radio to try and snag it Will report back I can certainly hear the 9k6 rush from the bird Diamond X300 BS antenna LDF4-50 Andrew VK4TEC

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Elementary School “21st of May”, Podgorica, Montenegro, direct via 4OØISS
by Dave Ryan 12 Oct '17

12 Oct '17

Hi all We are on Holidays in Cyprus and were able to hear the ARISS QSO with Astro Joe Acaba yesterday from the comfort of the beach near paphos in Cyprus. We downloaded the question and came up with our own best guess answers Dave 5B / M0GIW https://youtu.be/3AdmdJAJm9A

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Success - Falcon Sat 3 - Software Defined Radio and Virtual Audio to soundmodem
by Andrew Rich 12 Oct '17

12 Oct '17

Ok I don’t have good enough signal strength It just landed in the best angle for my antenna and came up and I decoded one packet on an AirSpy Mini I think I will have to go back to to the good old days of a turnstile and amp up the tower

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Digital satellites
by Andrew Rich 12 Oct '17

12 Oct '17

I am amazed at the radios, both analog and software defined and decoders tnc’s and programs that are out there I really can’t be bothered mapping what works with what I am convinced dire wolf is the best software defined decoder. It has been proved against a TNC I have a Mac Laptop and a Windows Laptop, perl to interface the two MacDoppler author won’t do TCP IP Freq adjustment and Alex is stuck on TCP IP doppler adjustment I just want a single LINUX / Mac based solution that does + Satellite tracking + Doppler Correction + Rotator control + Demods 1k2 9k6 + And passes it to the internet To do this I have stuff everywhere and its messy I am hoping one day that will change Why can’t we have TCP/IP radios ? that demod and doppler correct and decode . Oh well Andrew

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Upcoming ARISS Contact Schedule as of 2017-10-12 06:30 UTC
by AJ9N＠aol.com 12 Oct '17

12 Oct '17

Upcoming ARISS Contact Schedule as of 2017-10-12 06:30 UTC Quick list of scheduled contacts and events: Fleet Science Center, BE WISE Program, San Diego, CA, direct via KJ6KDZ The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Sat 2017-10-14 18:26:17 UTC 33 deg “A.Gramsci-N.Pende”, Noicattaro, Italy and Istituto Comprensivo “Tauro – Viterbo”, Castellana Grotte (Ba), Italy direct via IZ7RTN The ISS callsign is presently scheduled to be IRØISS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Fri 2017-10-20 08:47:01 UTC 81 deg Watch for HamTV (***) Tallaght Community School, Dublin, Ireland, direct via EI2SDR and Gymnasium Räddningsgymnasiet Sando, Sandöverken, Sweden, telebridge via EI2SDR The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is Mark Vande Hei KG5GNP Contact is a go for: Fri 2017-10-20 11:57:34 UTC 47 deg Watch for live stream https://www.youtube.com/user/TogDublin/live Istituto Scolastico Comprensivo “Nardi”, Porto San Giorgio, Italy and I.C. Michelangelo Buonarroti, Marina di Carrara, Italy direct via I6KZR and IQ5VR The ISS callsign is presently scheduled to be IRØISS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Fri 2017-10-20 15:14:34 UTC 46 deg Watch for HamTV (***) **************************************************************************** ** International Space Station Astronauts are Calling CQ Students – ARISS-US program education proposal deadline is November 15, 2017 September 18, 2017: The Amateur Radio on the International Space Station (ARISS) program is seeking proposals from U.S. schools, museums, science centers and community youth organizations to host radio contacts with an orbiting crew member aboard the International Space Station (ISS) between July 1 and December 31, 2018. Each year, ARISS provides tens of thousands of students with oppor- tunities to learn about space technologies and space communications through the exploration of Amateur Radio. The program provides learning opportunities by connecting students to astronauts aboard the International Space Station (ISS) through a partnership between NASA, the American Radio Relay League, the Radio Amateur Satellite Corporation and other Amateur Radio organizations and worldwide space agencies. The program’s goal is to inspire students worldwide, to pursue interests and careers in science, technology, engineering and mathematics (STEM) through Amateur Radio. Educators overwhelmingly report that student participation in the ARISS program inspires an interest in STEM subjects and in STEM careers. Ninety-two percent of educators who have participated in the program have indicated that ARISS provided ideas for encourag- ing student exploration, discussion, and participation, and 78 percent said that ARISS was effective in stimulating student interest in STEM. ARISS is looking for organizations that will draw large numbers of participants and integrate the contact into a well-developed education plan. Students can learn about satellite communications, wireless technology, science research conducted on the space station, what it is like to work in space, radio science, and any related STEM subject. Students learn to use Amateur Radio to talk directly to an astronaut and ask their STEM-related questions. ARISS will help educational organizations locate Amateur Radio groups who can assist with equipment for this once-in-a-lifetime opportunity for students. The proposal deadline for 2018 contacts is November 15, 2017. The ARISS website has additional details on expectations, proposal guidelines, and the proposal form. See: http://www.ariss.org/hosting-an-ariss-contact-in-the-us.html ************** **************************************************************** 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 124 Gaston ON4WF with 123 Francesco IKØWGF with 119 Sergey RV3DR with 100 **************************************************************************** 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 2017-10-12 06:30 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 1164. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1123. 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: Arkansas, Delaware, 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 2017-10-11 19:00 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. 52 on orbit Randy Bresnik Paolo Nespoli IZØJPA Sergey Ryazanskiy Exp. 53 on orbit Mark Vande Hei KG5GNP Alexander Misurkin Joe Acaba KE5DAR **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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Re: [amsat-bb] Signalink Modification for 9600 baud
by Andrew Rich 12 Oct '17

12 Oct '17

I can confirm that the Signal link wired up as 9k6 transmits 1k2 fine I just tested it Andrew > On 12 Oct 2017, at 12:37 pm, christy hunter <cchunter3(a)mindspring.com> wrote: > > thanks Andrew, > will be interested to hear how it works. > I can decode ok, but not thru the signalink. but it seems to not be practical anyway having to move the internal wire connector to use 9600. > 73 > christy kb6lty > > On 10/11/2017 19:18, Andrew Rich wrote: >> Twitter is flooded with Falconsat Reception reports as is my website >> >> I watched Falconsat on SDR - It has a fair amount of doppler >> >> I have a fully automated ICOM 910H with doppler correction sitting here hooked up to my Signalink having moved the internal jumper to 9k6 >> >> I await the bird >> >> Andrew VK4TEC >> >> >> >>> On 12 Oct 2017, at 11:46 am, David W0DHB <dave(a)w0dhb.net> wrote: >>> >>> Just looking at specs. >>> >>> 9.6 Khz baud packet needs (per G3RUH spec) >>> •Response to DC >>> •Response no worse than -4 db at 4.8 kHz >>> •No worse than -10 db at 7.2 kHz >>> >>> The Tigertronics spec's say audio response 300 Hz to 3.3KHz - ouch >>> Depending on how quickly the audio response curve rolls off the Signallink is kind of iffy for 9.6K . >>> Some folks have gotten it to work. >>> >>> This outfit has an isolation transformer spec'ed 20 to 20KHz. >>> A little pricey, but it is stereo so TX and RX audio are covered with a single unit >>> >>> http://www.fullcompass.com/prod/097486-Radio-Design-Labs-AVHK1 >>> >>> For just RX, a dongle, HDSDR and hs_soundmodem do a great job . >>> >>> Dave W0DHB >>> >>> >>> -----Original Message----- >>> From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of christy hunter >>> Sent: Wednesday, October 11, 2017 15:55 >>> To: amsat-bb(a)amsat.org >>> Subject: [amsat-bb] Signalink Modification for 9600 baud >>> >>> based on discussion with a technician at Tigertronics, the USB signalink will not allow 9600 baud packet due to the frequency response is too narrow. He said none of the commercial external soundcards will work with 9600 bd packet. The only option is to construct a circuit, or use a >>> 9600 baud TNC. (not too many options on that front.) >>> >>> the Tigertronics website is a bit miss-leading because it ref. 9600 baud on its wiring diagram. Mine is setup for the 6pin miniDin connector(the pin 4 - for 9600 bd on my radio dataport- is not connected) for my FT 847. At this time I can only decode by connecting the 9600 pin on my radio (dataport) to a line-in to my Laptop soundcard (and not using a isolation circuit). >>> >>> It would be nice to hear of any solution to this, without buying a $400 TNC (kantronics 9612). >>> >>> there are several websites that talk to this issue, here is one of them >>> >>> https://www.soundcardpacket.org/5modes.aspx >>> >>> 73 >>> Christy KB6LTY >>> >>> >>> --- >>> This email has been checked for viruses by AVG. >>> http://www.avg.com >>> >>> _______________________________________________ >>> 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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Re: [amsat-bb] Signalink Modification for 9600 baud
by Rick Kowalewski 12 Oct '17

12 Oct '17

Hi Christy, Correct, pin 4 on the 6 pin mini-din to Signalink SPKR pin. With the IC-9100, for example, it must be set to FMD (FM Data). Looks like the FT-847 needs menu #23 (Pkt-Rate) set to 9600. The cable I'm using is the SL-CAB6PM. This has all 6 wires connected. I was using it with a FT-847 when I had one. Plugs straight into the IC-9100. Just need to change the Signalink jumper from 5 to 4. I'm still yet to try TX. Will get there though :) 73, Rick VK6RK On 12/10/2017 09:56, christy hunter wrote: > Hi Rick. > thanks for commenting. for your setup I assume you are using the IC9100 6pin dataport? > the USB signalink is wired to pin 4(9600)? > and are you also Tx 9600 packet, uplinking to the Satellite? > my signalink has the little plug (sans connection to the pin 4), and with my radio cant test the > receive portion without rewiring to pin 4. (have tested as is with no joy). > 73 > christy KB6LTY > --------- you wrote ---------- > Well that's interesting. > > I've used a USB Signalink with an Icom IC-9100 and hs-soundmodem to > successfully decode 9600 from Falconsat-3. > To my knowledge, the Signalink has not been modified. > > 73, > Rick VK6RK > > On 12/10/2017 05:55, christy hunter wrote: > >/based on discussion with a technician at Tigertronics, the USB />/signalink will not allow 9600 baud packet due to the frequency />/response is too narrow. He said none of the commercial external />/soundcards will work with 9600 bd packet. The only option is to />/construct a circuit, or use a 9600 baud TNC. (not too many options on />/that front.) />//>/the Tigertronics website is a bit miss-leading because it ref. 9600 />/baud on its wiring diagram. Mine is setup for the 6pin miniDin />/connector(the pin 4 - for 9600 bd on my radio dataport- is not />/connected) for my FT 847. At this time I can only decode by />/connecting the 9600 pin on my radio (dataport) to a line-in to my />/Laptop soundcard (and not using a isolation circuit). />//>/It would be nice to hear of any solution to this, without buying a />/$400 TNC (kantronics 9612). />//>/there are several websites that talk to this issue, here is one of them />//>/https://www.soundcardpacket.org/5modes.aspx />//>/73 />/Christy KB6LTY/

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Signalink Modification for 9600 baud
by ab2cj 11 Oct '17

11 Oct '17

All: Has anyone modified a Signalink interface to work 9600 baud satellites? It's my understanding that transformers and other isolation components introduce phase distortion making the unit inoperable for 9600 baud operation. Has anyone tried the stock USB unit with the built-in sound card on terrestrial 9600 baud packet? Tony -K2MO

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T8 Palau Satellite Activation
by JoAnne Maenpaa 11 Oct '17

11 Oct '17

Waiting for the weekend would be too late ... If you're in range you might bag a new one on satellite ... T8, Palau: Kay/JH3AZC (T88CX) and Taka/JP3EXR (T88DG) will be active from Palau Island (OC-00) on 2m EME between the 11th and 16th. QRV as T8EM on JT65B. Taki/JH3QFL operates as T88CU via satellites and on HF. QSL direct via JP3EXR. (via the DARC DX Newsletter DXNL 2062 - October 11, 2017) -- 73 de JoAnne K9JKM k9jkm(a)amsat.org

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Upcoming ARISS Contact Schedule as of 2017-10-11 19:00 UTC
by AJ9N＠aol.com 11 Oct '17

11 Oct '17

Upcoming ARISS Contact Schedule as of 2017-10-11 19:00 UTC Quick list of scheduled contacts and events: Elementary School “21st of May”, Podgorica, Montenegro, direct via 4OØISS The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is Joe Acaba KE5DAR Contact was successful: Wed 2017-10-11 11:48:02 UTC 50 deg (***) The Alice Smith School Primary Campus, Kuala Lumpur, Malaysia, direct via 9M2RPN The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is Mark Vande Hei KG5GNP Contact was successful: Wed 2017-10-11 15:24:05 UTC 79 deg (***) Fleet Science Center, BE WISE Program, San Diego, CA, direct via KJ6KDZ The ISS callsign is presently scheduled to be NA1SS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Sat 2017-10-14 18:26:17 UTC 33 deg “A.Gramsci-N.Pende”, Noicattaro, Italy and Istituto Comprensivo “Tauro – Viterbo”, Castellana Grotte (Ba), Italy direct via IZ7RTN The ISS callsign is presently scheduled to be IRØISS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Fri 2017-10-20 08:47:01 UTC 81 deg (***) Tallaght Community School, Dublin, Ireland, direct via EI2SDR and Gymnasium Räddningsgymnasiet Sando, Sandöverken, Sweden, telebridge via EI2SDR The ISS callsign is presently scheduled to be OR4ISS The scheduled astronaut is Mark Vande Hei KG5GNP (***) Contact is a go for: Fri 2017-10-20 11:57:34 UTC 47 deg (***) Watch for live stream https://www.youtube.com/user/TogDublin/live (***) Istituto Scolastico Comprensivo “Nardi”, Porto San Giorgio, Italy and I.C. Michelangelo Buonarroti, Marina di Carrara, Italy direct via I6KZR and IQ5VR The ISS callsign is presently scheduled to be IRØISS The scheduled astronaut is Paolo Nespoli IZØJPA Contact is a go for: Fri 2017-10-20 15:14:34 UTC 46 deg (***) **************************************************************************** ** International Space Station Astronauts are Calling CQ Students – ARISS-US program education proposal deadline is November 15, 2017 September 18, 2017: The Amateur Radio on the International Space Station (ARISS) program is seeking proposals from U.S. schools, museums, science centers and community youth organizations to host radio contacts with an orbiting crew member aboard the International Space Station (ISS) between July 1 and December 31, 2018. Each year, ARISS provides tens of thousands of students with oppor- tunities to learn about space technologies and space communications through the exploration of Amateur Radio. The program provides learning opportunities by connecting students to astronauts aboard the International Space Station (ISS) through a partnership between NASA, the American Radio Relay League, the Radio Amateur Satellite Corporation and other Amateur Radio organizations and worldwide space agencies. The program’s goal is to inspire students worldwide, to pursue interests and careers in science, technology, engineering and mathematics (STEM) through Amateur Radio. Educators overwhelmingly report that student participation in the ARISS program inspires an interest in STEM subjects and in STEM careers. Ninety-two percent of educators who have participated in the program have indicated that ARISS provided ideas for encourag- ing student exploration, discussion, and participation, and 78 percent said that ARISS was effective in stimulating student interest in STEM. ARISS is looking for organizations that will draw large numbers of participants and integrate the contact into a well-developed education plan. Students can learn about satellite communications, wireless technology, science research conducted on the space station, what it is like to work in space, radio science, and any related STEM subject. Students learn to use Amateur Radio to talk directly to an astronaut and ask their STEM-related questions. ARISS will help educational organizations locate Amateur Radio groups who can assist with equipment for this once-in-a-lifetime opportunity for students. The proposal deadline for 2018 contacts is November 15, 2017. The ARISS website has additional details on expectations, proposal guidelines, and the proposal form. See: http://www.ariss.org/hosting-an-ariss-contact-in-the-us.html **************************************************************************** ** 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 124 Gaston ON4WF with 123 Francesco IKØWGF with 119 Sergey RV3DR with 100 **************************************************************************** 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 2017-10-12 19:00 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 1164. (***) Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1123. (***) 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: Arkansas, Delaware, 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 2017-10-12 19:00 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. 52 on orbit Randy Bresnik Paolo Nespoli IZØJPA Sergey Ryazanskiy Exp. 53 on orbit Mark Vande Hei KG5GNP Alexander Misurkin Joe Acaba KE5DAR **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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