February 2020 - AMSAT-BB - mailman.amsat.org

Newbie Questions - ISS
by ka3hdo＠gmail.com 15 Feb '20

15 Feb '20

There is a great deal of information on the ARISS web site www.ariss.org <http://www.ariss.org> . News of note is usually posted on the main page. This includes the fact that our first (of two) next generation radio systems is getting ready for launch on SpaceX-20 (tentative launch date--March 2). Look under the news tab for upcoming school contacts (with a 145.80 downlink). Weekly reports provide a view of what is happening in the ARISS community. General Contacts Tab provides info on working the ISS (Primarily APRS and SSTV downlinks). Joanne's APRS resource guide is linked on this page. The link to the SSTV galley can also be linked from this site. Enjoy! 73, Frank KA3HDO Message: 12 Date: Fri, 14 Feb 2020 10:11:45 -0500 From: Jackie Dander <shorenicehere(a)gmail.com <mailto:[email protected]> > To: amsat-bb(a)amsat.org <mailto:[email protected]> Subject: [amsat-bb] Newbie Questions - ISS Message-ID: <CAHHZQ2mqxdGdy3woKwaHGXgwjha8ZUMO=wMv7ta2q_WqOfi_cA(a)mail.gmail.com <mailto:CAHHZQ2mqxdGdy3woKwaHGXgwjha8ZUMO=wMv7ta2q_WqOfi_cA@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" 1. Is this the best way or place to post such questions? 2. I have studied past posts and other sources but can't find answers to questions below. 3. I am trying to listen to ISS. N2Y0 and HeavensAbove list the same pass for my location today (FM14be, 16:39 local time, elevation 56 degrees) but AMSAT predictor says 4 degrees for that pass. Why the difference? 4. N2Y0 says up/down is 437.550/437.550, ASFK, inactive. HeavensAbove says 145.825/447.550 FM active. Who is right? How can I get correct frequencies to listen to? thanks Isaac -------------------------------------------- Frank H. Bauer, KA3HDO ISS Ham Radio Program Manager & PI ARISS International Chair AMSAT V.P. for Human Spaceflight Programs

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rasbarry pi
by James Brown 14 Feb '20

14 Feb '20

Is anyone running sat 32 on a raspberry computer? If so how would I set it up? Jim KI6WJ

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Re: [amsat-bb] Raspberry Pi
by Roy Dean 14 Feb '20

14 Feb '20

> > Gpredict is very easy to install on a Raspberry Pi. I did so on the > "Buster" version of Raspbian. There is a .deb file to download and it just > installs and runs. Disclaimer: I have not tried to use it more than just > to see that it started up ok and displayed satellites. 73, Burns WB1FJ When I first set up my groundstation, I was exclusively using Gpredict on a Pi 3B+ to run my G5400b rotator (along with hamlib rotctld). No problems whatsoever. --Roy K3RLD

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Newbie Questions - ISS
by Jackie Dander 14 Feb '20

14 Feb '20

1. Is this the best way or place to post such questions? 2. I have studied past posts and other sources but can't find answers to questions below. 3. I am trying to listen to ISS. N2Y0 and HeavensAbove list the same pass for my location today (FM14be, 16:39 local time, elevation 56 degrees) but AMSAT predictor says 4 degrees for that pass. Why the difference? 4. N2Y0 says up/down is 437.550/437.550, ASFK, inactive. HeavensAbove says 145.825/447.550 FM active. Who is right? How can I get correct frequencies to listen to? thanks Isaac

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Re: [amsat-bb] Leo Bodnar ICOM IC-9700 Reference Injection Board
by Mark L. Hammond 14 Feb '20

14 Feb '20

Hi Bob, I have this setup. It works great--and in fact so well, it's hard to see! The "setup" didn't do anything for me unless I ran the numbers WAY off to one side or another. Then the radio acted weird--it was effectively messing up the proper oscillator freq. and sounded warbled. I've put coarse and fine in the middle of the recommended ranges and leave them there...the "tuning" is broad. Don't fret over adjusting uch here... How can you see it working? Here's what I did--use the waterfall to watch a stable, steady signal (even a "Birdy") on 2M, on SSB. Zoom in the waterfall, so it's like +/- 2 kHz. Now, using the software for the freq. standard, toggle the reference signal ON and OFF, slowly....you should be able to see the "birdy" move just a little, back and forth as you toggle off and on. With the freq. standard "on", it's in the right calibrated place. With it OFF, it's showing you how far off freq. your radio is without correction. Hope that's clear! I spent some time convincing myself it was working--and did what I tried to explain above. check it out, let me know how you make out. 73, Mark N8MH At 06:03 AM 2/14/2020 -0800, Bob Hammond via AMSAT-BB wrote: >Anyone in the US use this board (along with a GPSDO) in their 9700? > >http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=… > >How do you know it's actually working? I have yet to be able to do their >set up suggestion as described. > >Always learning..... > >Bob W7OTJ >_______________________________________________ >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: https://www.amsat.org/mailman/listinfo/amsat-bb

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Leo Bodnar ICOM IC-9700 Reference Injection Board
by Bob Hammond 14 Feb '20

14 Feb '20

Anyone in the US use this board (along with a GPSDO) in their 9700? http://www.leobodnar.com/shop/index.php?main_page=product_info&products_id=… How do you know it's actually working? I have yet to be able to do their set up suggestion as described. Always learning..... Bob W7OTJ

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Office Closed
by Martha 13 Feb '20

13 Feb '20

The AMSAT Office will be closed on Monday, February 17th for President's Day. -- 73- Martha

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SwampSat 2 ID
by Nico Janssen 13 Feb '20

13 Feb '20

Doppler measurements show that SwampSat 2 is object 45115 (2019-071E). Downlink frequency: 436.3493 MHz. 73, Nico PA0DLO

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SDR Recommendations
by Mike Lucas 13 Feb '20

13 Feb '20

I'm thinking of acquiring an SDR unit for the station for downloading sat telemetry etc. I'm new to the SDR world but learning. I'm currently using a Yaseu 736R which has served me well. Not sure how you configure SDR for Doppler tracking etc. so looking for links to info I can educate myself on what all I need etc. Are there any particular SDR radios that lend themselves best for satellite work more than others? The SDR Play boxes look solid, are they recommended? Regards, Mike N7ASZ

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EM21/31 CAS4A/B
by Bob Liddy (K8BL) 13 Feb '20

13 Feb '20

Gridders, On my 2324Z pass on 2/12 on CAS4B from the EM21/31 Line in LA, I logged the following Calls: KG5UN, K4DTM, KC3KOP, K3RRR, KJ4EU, N8AP On my 2349Z pass on 2/12 on CAS4A from the EM21/31 Line in LA, I logged the following Calls: N8IUP, NA1SA (+ whistling, counting QRM aplenty) If I botched your Call or missed it during my transcription, let me know and I'll re-check my recording. Will upload to LoTW soon. (No eQSL) 73, Bob K8BL

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