![jaero planeplotter 98w jaero planeplotter 98w](https://i.pinimg.com/originals/9f/01/72/9f01722f495dad37b794da7d67649b78.jpg)
I heard on #hearsat that using AM to demodulate QPSK will tell you the bitrate because there will be a spike in the audio waterfall. I have been able to get a better indoor signal (see below), but the signal strength pictured above is pretty typical right now.
![jaero planeplotter 98w jaero planeplotter 98w](https://jontio.zapto.org/hda1/jaero-images/jaero-linux.png)
However, all I had to do was take the setup outdoors (see 3.1) and it outperformed the 10-turn helix. If I just knew what the really wide signal was, I'd decode it in GNUradio and publish the details. People on hearsat told me that a dish setup was the very best, but after this kind of performance I was in doubt. No matter what, this wide signal seems to come in much stronger than the numerous ~168 kHz ones on killmore231's Imgur page.
#JAERO PLANEPLOTTER 98W HOW TO#
I found that the perfect focal distance for L-band is in fact right where the original Ku/Ka LNB was, so you'll notice in the dish photos that that's where the helix is mounted. Just moving up to C band and was wondering if anyone here is using the above LNBF My question is how to power the unit for less than 60 AUD The Plane plotter group has a pdf with a nice home brew bias t costing about 30 USD all up (unfortunately it involves surface mount components and. I suspect the poor indoor performance is partly due to the tree outside my window, and of course the glass and metal of the window. Notice how most of the signals are bright red. #3.1 (Best): LHCP helix and 81cm DirecTV dish, outdoors I like that I was able to at least see a signal indoors, but it really works much better outside. On #hearsat I found that these are some kind of aircraft signal, I think 3372 kilobit QPSK, but so far JAERO won't do anything with them. However, all I had to do was take the setup outdoors (see #3.1) and it outperformed the 10-turn helix. People on #hearsat told me that a dish setup was the very best, but after this kind of performance I was in doubt. #1 (Okay): 9A4QAV tin-can helix (YouTube video)
![jaero planeplotter 98w jaero planeplotter 98w](https://i.ytimg.com/vi/zfIAv_oYGZ8/mqdefault.jpg)
I'll provide a comparison of the helix antennas I've tried. To my surprise, was able to tell me it came from CONUS Inmarsat at 98W. My tin-can antenna is pretty directional (but not as much as the 10-turn helix), and this signal came in best when I was aimed southwest and pointed high. I mention it because it came in pretty strong and I'm willing to bet I could've decoded it, if I had access to a decoder. The next day I found an even wider signal (pictured), which neither nor I could identify. During a chat I had on #hearsat, informed me that those are BGAN, which is an Internet service. I was just able to discern those relatively wide signals (~168 kHz) shown on killmore231's Imgur page. Recently I built another of Adam 9A4QAV's antennas, this time his tin-can helix. Even though the signals are weaker and require special antennas, I prefer a weaker constant signal to the hopping blowtorch bursts of Iridium. I'm taking a break from Iridium to experiment with Inmarsat.