AMSAT-BB February 2018

171 participants
245 discussions

XW2D digital uplink interference?
by Robert Bruninga 04 Feb '18

04 Feb '18

One of the XW-2 birds seems to have a steady digitial signal in the center of the passband. Is this from the bird, or something it is hearing on the uplink? If it is on the 435.21 to 435.23 uplink it should be nice challenge to try to derive its position from Doppler observations, and then start searching on the ground. Both are lots of fun and a nice ham challenge. Again, I have not listend to these birds enough to get the big picture, so if I am confused, ignore me. Its just that this week is our classes annual week to tune in some satellites and I have heard this signal multiple passes. Bob, WB4APR

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FUNcube-1/AO73 operations
by Graham Shirville 04 Feb '18

04 Feb '18

Hi All, AO73 is now in continuous educational mode. Please expect the next mode change to take place on Thursday. Predictions indicate that AO73 will enter continuous sunlight for a period of approx six weeks on Tuesday! 73 Graham G3VZV

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SatPC32 auxiliary files
by radiomb 04 Feb '18

04 Feb '18

What would be nice if one location had all the files (even Amsat). A newbie like me just starting out using SatPC32 has a big learning curve. Making these available would be a big help. Is there such a place? Or someone that could send the files?TNX 73 Mike K4MIA

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AO-92 Uplink Question
by Brian 04 Feb '18

04 Feb '18

I was able to hear the past 2 passes of AO-92 this morning. Per the the past couple of posts, it looks like AO-92 is using the 1.2 uplink freq. How can I find out when it will be using the 435 uplink freq ? Thank you Brian, KG8CO

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Question about PL/CTCSS on uplink
by Philip Jenkins 04 Feb '18

04 Feb '18

I understand why FM satellites need an PL tone on uplink (to keep out land-mobile services, like taxi-cabs, etc), but why is a PL not required for the linear sats utilizing the same frequencies? A linear transponder is certainly capable of receiving/transmitting an FM signal (albeit not successfully demodulating that signal). This question came up at a satellite presentation I did, and I had never thought about it. ( Moreover, will radios even transmit a PL on SSB/CW transmissions?) Philip N4HF

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El over Az antenna project
by Todd W Deckard 04 Feb '18

04 Feb '18

The new FM sats have inspired me to work on the antenna project ... ... thanks to everyone who suffered my QRM last winter, see you in the air when it warms up ... https://youtu.be/VG5L5oP2uNk Todd KE0CMD Sent from my iPhone

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AO-92 in L-band 1510utc 4 Feb 2018 for 24 hours
by Mark L. Hammond 04 Feb '18

04 Feb '18

Subject says it all, per schedule. Thanks users for your cooperation! Enjoy...hearing folks get in at 1 deg elevation. Wow...nice! Mark L. Hammond [N8MH]

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Mysterious Chinese satellite
by Roland Zurmely 04 Feb '18

04 Feb '18

I heard a mysterious Chinese satellite at 9k6 BPSK on 435,325 MHz: from BUAABJ to BUAAGS (UI, payload: 31 byte) 000 > 00 84 AA 82 82 8E A6 E0 84 AA 82 82 84 94 61 03 F0 7A 65 72 020 > 6F 47 20 4C 61 62 20 43 6F 2E 20 4C 74 64 20 42 65 69 6A 69 040 > 6E 67 20 43 68 69 6E 61 .„ª‚‚Ž¦à„ª‚‚„”a.ð zeroG Lab Co. Ltd Beijing China What is it? 73 de Roland PY4ZBZ

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FengMaNiu 1 (FMN 1) identified
by Nico Janssen 04 Feb '18

04 Feb '18

All, Detailed doppler measurements show that FengMaNiu 1 (FMN 1) is object 43192, 2018-015A. Downlink: 435.350 MHz. 73, Nico PA0DLO

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Re: [amsat-bb] S BAND USE
by Edward R Cole 04 Feb '18

04 Feb '18

Likewise I still have my 33-inch offset dish with 6 turn RHCP helix feed with MKU LNA and two Drake converters: one unmodified with 123-MHz out and other modified for 435-MHz out. Worked very well on AO-40 mode-US and mode-LS. 73, Ed - KL7UW From: Jerry Buxton <n0jy(a)amsat.org> To: amsat-bb(a)amsat.org Subject: Re: [amsat-bb] S BAND USE Hi Bob, No immediate plans for AMSAT-NA but GOLF will give us opportunities to play with a variety of bands over time so I won't rule it out.? Anyway, I still have my K5GNA downconverter and BBQ dish on my array so I'm in a reasonable position to influence a way to put them back into use if I get a hankerin'!?? :-D Jerry Buxton, N?JY On 1/29/2018 14:19, Bob- W7LRD wrote: > Hello-Is there any chance of using S Band (2.4 Ghz) being used on any future satellites? I know there are several of us who have a box of down converters and associated equipment, waiting for "something". I know the five & dime is being planed. > > 73 Bob W7LRD 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubususa(a)gmail.com

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AMSAT-BB February 2018