[amsat-bb] Re: so long
On 17/09/13 20:19, n0jy wrote: Dang. Now what are we going to do? Eat the fish left behind ? :) 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: CAMSAT BUAA-SAT Amateur Radio Satellite
Hi Trevor, On 19/09/12 01:52, Trevor . wrote: CAMSAT BUAA-SAT Amateur Radio Satellite http://www.uk.amsat.org/?p=10387 Is this the same CAMsat as Graham mentioned in his presentation, or an entirely different spacecraft ? 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: AMSAT-UK - Fall OSCAR News
Trevor Wrote: On 30/09/11 00:26, Trevor . wrote: > AMSAT-UK - Fall OSCAR News > > The Fall edition of the color A4 newsletter OSCAR News is being posted to > AMSAT-UK members this week > > As usual it's packed with Amateur Satellite articles: > [SNIP] > - Syncart geostationary transponder [SNIP] Teases! (All of you involved in OSCAR News, not just Trevor!) I read this last night, and was hoping it might be an announcement of a possible opportunity. OSCAR News arrived here this morning, and it's "just" an article about the transponder. Good article, and great edition of OSCAR News though 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: ARRISat-1 heard
Hi Matthias, You Wrote: On 13/08/11 21:35, Matthias Bopp wrote: > Very nice copy of ARISSAT-1 on 145.950 MHz in Germany JN49QF at 20:28 UTC. > > Satellite had strong signal until it switched off during the pass and did > not come back before LOS. Correlates exactly with what I observed from G land. S/C was in sunlight for the first few minutes of the pass, which probably explains why I only got signals in the first half of the pass.. Annotated screenshot of multiple waterfalls implemented in gnuradio-companion from during the pass here: http://hal.g7iii.net/screenshots/ARISSAT-FCD-Live.png I took multiple, but this one seemed to show everything the clearest 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: ARISSat-1: still silent 12 Aug 21:30utc
I was testing some grc/gnuradio code, and I'm sure I saw something on the waterfall bang where I was expecting CW-2 and the BPSK Beacon (and that was after a ton of my own filtering and re-sampling, so I'm pretty sure I got the code right on the first attempt for once, and I heard the bird) Unfortunately I was so excited, I messed up the screen grab! Oh, well, on to the ~2300Z pass Current code cannot decode tlm (was just checking doppler calculations, and offsets for the beacons were correct etc). Didn't see anything on the transponder or FM downlinks myself. http://www.arissattlm.org/mobile indicated that she was in Low Power mode, but that telemetry had been received. 73s Iain On 12/08/11 22:34, PA3GUO wrote: > Unfortunately: ARISSat-1 still silent (entire downlink BPSK/CW/Xponder/FM). > > There were up to 13 people connected at the same time to the audio stream. > > Next passes: > 23:00 utc 87 degrees > 00:36 utc 86 degrees > http://www.pa3guo.com/webradio.html > > Equipment: FCD + 2x6 elements beam > Will tune to FM downlink > > Henk, PA3GUO, The Netherlands, JO21RJ > > > > ___ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Decoding wideband recordings
On 09/08/11 23:54, Phil Karn wrote: > It's been suggested that I modify my ARISSat-1 BPSK-1000 telemetry > demodulator/decoder to accept wideband quadrature (I & Q) recordings > like those produced by most of the software defined radios out there. > > This is fundamentally not that hard, but first I need some information. > > How many people could actually use this? What is the format of the > recorded files? Is there a standard, or does each make of SDR produce > its own? I'd use it. In fact I drive my Funcube Dongle with gnuradio. It would mean I could simplify my flow graphs, and not have to stick have the audio out to a loopback ALSA soundcard, and then into your decoder. (I could then squirt the I/Q stream to a FIFO, and pump that to your decoder, and save all the blocks needed to do the SSB stuff, and dropping it down to audio) In fact, IIRC, its not that hard in gnuradio to do BPSK decoding anyway, it's just no-one's actually done it. You have to just unhook the differential part of the decoder AIUI. Easy in python, but not possible so much in the in the gnuradio-companion, which I use to construct the flow graphs graphically 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Actual P3E Status/Update
Hi Peter, Many thanks for the detailed update, it's helped with my own project planning! Hopefully the postponement was just diaries getting to full, and will happen soon, maybe in time for breaking news at the AMSAT-UK Colloquium in late July ? :) Good Luck, and fingers crossed for a launch closer to 2012 than 2018! 73s Iain On 22/05/11 15:22, Peter Guelzow wrote: > the official .PDF file can be downloaded directly from AMSAT-DL server: > > for those who attended the meeting, please note that the planned meeting > on May 18 with DLR was postponed. > > > AMSAT-DL Satellite Symposium and General Meeting 2011: Status of AMSAT > P3-E and DLR-AMSAT P5-Moon/Mars. > http://www.amsat-dl.org/pic/gallery2/main.php?g2_itemId=8719 > > direct download: > http://www.amsat-dl.org/pic/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=8719 > > > > 73s Peter > > > ___ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Full Duplex as a Single Channel on a HT
On 08/04/11 20:09, Bill W1PA wrote: > Do any of the current or classic "satellite" HT's (FT-51R, IC-W32A, etc) > allow you to create a single channel with a FM bird rx/tx pair in full > duplex? IIRC, the IC-32A/AT/E does, but it's been a long long time since I used one in that manner... 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] ARISSat 1 & Funcube Telemetry Question: DBPSK vs BPSK
Hi All, Just a quick clarification needed by me on the Telemetry format that is going to be used by ARISSat-1 and Funcube (& I guess the Funcube boards onboard UKube-1...) Lots of places are referring to it as BPSK1000, but I have seen references claiming it is DBPSK. Can someone clarify if it is Differential BPSK, or "just" plain old BPSK as used before, but at 1000 BPS, rather than 400 ? Reason for asking is that I have a USRP, and use gnuradio, along with the gnuradio-companion. That has DBPSK blocks built in, but pure BPSK would take a little more work (possibly just routing the output to a loopback soundcard, and then running decoding software) 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Help with predict
predict.tle See my other email for details. You should have a directory in your home directory, called .predict You'll find it there. 73s Iain On 05/02/11 11:21, Andrew Rich wrote: > Which file do I trim to reduce to a few sats ? > > Sent from my iPhone > Andrew Rich > > On 05/02/2011, at 18:30, Greg D. wrote: > >> What do you need? I use it regularly. >> >> Greg KO6TH >> >> >>> From: vk4...@tech-software.net >>> To: amsat-bb@amsat.org >>> Date: Sat, 5 Feb 2011 12:02:09 +1000 >>> Subject: [amsat-bb] Help with predict >>> >>> Can someone give me hand with predict under LINUX >>> >>> + Install predict - done >>> + Define QTH - done >>> + Reduce satellite tracking list to just ISS / SO-50 and AO-51 (to do) >>> >>> I will work out the keps location and how to script that bit >>> >>> I have scripts that can query preidict in server mode >>> >>> - Andrew VK4TEC - >>> ___ >>> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. >>> Not an AMSAT-NA member? Join now to support the amateur satellite program! >>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > ___ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Help with predict
There will be a directory in your home directory called .predict In there, you'll find predict.qth, predict.db, and predict.tle 73s On 05/02/11 02:02, Andrew Rich wrote: > Can someone give me hand with predict under LINUX > > + Install predict - done > + Define QTH - done > + Reduce satellite tracking list to just ISS / SO-50 and AO-51 (to do) > > I will work out the keps location and how to script that bit > > I have scripts that can query preidict in server mode > > - Andrew VK4TEC - > ___ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: HO-68 Status 110120
On 20/01/11 04:25, Andrew Glasbrenner wrote: > Unfortunately no beacon and no transponder heard on the 0420z pass here. Nothing heard on the 2043z 20th Jan pass over the UK either, despite it being a long and high 20 minute pass. Would have been great to road test my Gnuradio SDR CW receiver as webb, but next time :) -May- have spotted something on the waterfall like it's CW beacon, but very very weak, where as last night it was very very strong with me. I don't think it was unless it was extremley week, didnt even show up until well after 45 degrees elevation, where as last night, I could spot the beacon from AOS to LOS Did have to realign the antennas earlier, but AO-51 popped up at the right time, in the right place with two passes earlier, so I think they are close enough 73s Iain ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Need Advice for SDR choice
On 03/01/11 21:26, Vince Fiscus, KB7ADL wrote: > At 06:25 PM 1/2/2011 -0500, marklhamm...@gmail.com wrote: >> Check out: >> >> http://www.funcubedongle.com/ >> >> Assuming you only need receive, of course... >> >> Works great...just had a QSO on FO-29 using it for receive (thanks KB1RVT!). >> >> 73, >> >> Mark N8MH > > > You know what's really interesting to me about this. With a WX type > enclosure you could put the receiver right at the feedpoint of the antenna. > > Well, maybe not, I don't know what the maximum USb cable length can be. USB is not going to make *that* kind of distance, and I wouldn't reccomend it anyway, due to lightning etc...*BUT* you can get USB Opto Converters... I must confess, once I've played a bit more with my USRP, There's likely to be a USRP2 going up the mast, with an ethernet<->fibre adapter on the end... 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: Need Advice for SDR choice
On 03/01/11 15:03, Gordon JC Pearce wrote: > There *are* sample programs, but none of them appear to build in Linux. > Maybe I'm missing something. I got somewhere with the Qt version, but > it moans about libusb not being installed. Why it can't see libusb > sitting there happily in /lib/ is beyond me. The build probably wants the -dev package as well as the built library, you might want to check if you have it installed. I'm afraid I've been a tad busy playing with the USRP SDR this Christmas, but I might look at the linux code for the FCD in the next couple of weeks I suspect most of the compile issues are dependancy related...I know I'm spoilt these days on debian and ubuntu with the build-depends :) 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] [OTish] Reasonably Dual-Band Large Crossed Beam
Hi All, I have been looking at replacing my 3/6 ele Dual Band Beam with a larger one (actually for some semi-local packet work rather than satellite, hence the OT-ishness of this post. I know there is the 9/19 ele crossed Tonna, but I also understand the build quality on the boom isn't wonderful. I'm also aware of the Hygain equivalent, but they look to be owned by MFJ now... I'm sure M2 did one at one point, but the only dual band I can see from them is a 5 ele on 2. I was looking closer to 9 ele to be honest. Does anyone know of any other supplier that does something similiar to the Tonna ? 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: WBFM with the ICOM: IC706MK2 and G, IC-703+
Hi Stan, Stan, W1LE wrote: > Hello The Net: > > Can some one confirm that the IC-706MK2 and the 706MK2G > can both handle WBFM in the 6M and 2M ham bands ? > > Objective is to use this rig as an RX IF with a 2.4 GHz down converter > and have enough detected BW for a Multi7 TNC to decode the 2.4 GHz sats. I'm afraid I can't help with the 706's, but I'm curious about the Multi7 TNC, since I don't think I've ever heard of it. I tried a google search, and came up empty. Is there a web page somewhere describing it. Is it still available somewhere ? 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: ANNOUNCE: aprstlm 1.4 Available With Support For Castor And Pollux
Iain Young, G7III wrote: > For those with aprstlm v1.3, there is a patch available at > http://www.xciv.org/aprstlm/v1.4/aprstlm-1.3-1.4.patch.gz. > Gunzip and apply with patch -p1 And Doh, Garbled URL for the patch, Sorry folks, try: http://hal.g7iii.net/aprstlm/v1.4/prstlm-1.3-1.4.patch.gz ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] ANNOUNCE: aprstlm 1.4 Available With Support For Castor And Pollux
Hi All,
aprstlm (A unix/linux ncurses APRS [& now AX.25] telemetry viewer)
version 1.4 is now available. A Tarball of the source is at:
http://hal.g7iii.net/aprstlm/v1.4/aprstlm-1.4.tar.gz
For those with aprstlm v1.3, there is a patch available at
http://www.xciv.org/aprstlm/v1.4/aprstlm-1.3-1.4.patch.gz.
Gunzip and apply with patch -p1
Buiding:
To build, you will need a standard gcc install, as well as the
ncurses development libraries. Building is simple, just type
make in the aprstlm-1.4 directory. A binary, called aprstlm
is created.
Running:
There are now two modes of running aprstlm. One is that you
give it an APRS server and port, and it connects to it, and
awaits telemetry from the specified satellite, eg:
./aprstlm -sat PCSAT -aprs aprshost.somenet.com 14580
aprstlm however, can now read from stdin. This was needed,
when implementing support for Castor and Pollux, as it was
not certain all IGATEs would pass their telemetry frames,
and indeed, as they are not strictly APRS packets, then some
do not.
How you get the AX25 frames to aprstlm's stdin is up to you.
I don't have any radios up at the moment, but something like
the axlisten command might well be useful, or alternatively,
just an netcat to an APRS server, or a local TNC would suffice.
To run in stdin mode, add the -stdin flag, eg :
nc arprs.somehost.net 14580 | ./aprstlm -sat POLLUX -stdin
Please note, by using the stdin mode, the keyboard is disabled,
you must use Control C to exit the program, not "Q", as documented.
Also, you will only see the Engineering Telemetry values
screen, not the raw values screen. This is due to the way
I "hijacked" the internals of aprstlm to work for castor and
pollux without having to redo most of the code.
Other features remain the same as previous versions, and
a brief (and way out of date, but still relevant)web page
which documents v1.0 is at http://www.xciv.org/~iain/aprstlm
New Features in Version 1.4:
o Support for Castor and Pollux ("The Twins")
o Read from stdin mode (but disables the keyboard)
o Some core improvements, that should make it easier
to add further AX25 satellites later
Version 1.4 is not really very polished at the moment, but it
does display telemetry from castor and pollux. With pollux only
meant to be with us for 6 months, I wanted to get this out
there as soon as possible.
I do intend to release 1.4.1, which should be able to process the
MEMS telemetry packet as well, as soon as Ivan gets the chance
to post the equations and details.
Also, the predict mode doesn't work for castor and pollux yet,
as we don't have confirmed NORAD object numbers, or epoch times
(Exactly when they were released from the shuttle)
Further improvements (esp to the castor and pollux displays) will
most likely be in 1.4.1 as well
73s
Iain
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[amsat-bb] Re: ANDE-2 Callsigns?
Ken Swaggart wrote: > What callsigns should we expect from the two ANDE-2 satellites? > According to the telemetry examples: KD4HBO-1 for castor, and POLLUX-1 for pollux No idea if the KD4 call was just used for testing, or if it's going to be used in flight. Guess we'll have to wait for AOS to be sure. 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: ANDE-2 Deployment
g7...@g7iii.net wrote: > TX is on 145.825, so any Satgate should pick them up and transfer > the data to APRS-IS. > > I suppose I should go update my APRS/PCSAT/PCSAT2/ANDE telemetry decoder > now. Wish I'd realised these were going to be this "open" earlier *mutter*. And Hmm. With a closer look I just realised that the telemetry is pure AX.25 rather than APRS. Having said that TELEM appears to be a legitimate APRS destination address. However, that would make the first S of SYS the "APRS Data Type Identifier", which strictly speaking is listed as "Do not use" Any IGATE authors on here know if their IGATE code is that strict ? or if it's likely to pass these packets anyhow ? I wonder if the packet payload length (~142 characters) would prevent the IGATE s/w passing the packets onto APRS-IS ? 73s Iain ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
