That gave me best range and most received a/c.
#Piaware better than planeplotter how to#
The RPi is running the most current version of FlightAware’s PiAware, rev 3.0.4, and supports just about any off-the-shelf USB SDR dongle.Īfter setting it up, it looked like I needed to reduce the overall gain a bit, so I discovered how to go into dump1090 and change the gain from “automatic” (really not, I think it’s just max) to 42 dB. While the signal of interest is only a MHz wide, I wanted a filter that was wider so that temperature and mechanical variation would never haunt me, and I wanted a low bandpass loss (the above shows less than 1 dB loss) across the band.īehind the filter is a run-of-the-mill eBay wideband LNA with a 1 dB NF, and somewhere around +30 dBm IP3. The SA just doesn’t have the range to see it. Solid out of band rejection, and I suspect around -100 dB ultimate rejection. It’s a straightforward cavity filter, a little aluminum brick with fine performance. The black square in the center of the image is the 1090 MHz filter, and it’s a quite good one. So, I drafted up what I thought would be a reasonable spec and went into Alibaba to find a filter manufacturer to build one. I ended up with 5 filters, all exactly to my spec, and for a bargain price (well, relatively speaking).Ībove is the finished ADS-B receiver assembly, complete with Raspberry Pi, RTL-SDR 1ppm TCXO SDR dongle, a eBay-purchased LNA, an eBay-purchased 12 vdc to 5 vdc DC-DC converter, and some coaxial cabling (also from eBay). Not that I had an immediate need, I didn’t have anything on a mountaintop, but I suppose I had a little extra cash and felt excited to be able to imagine a good ADS-B receive site atop an Arizona mountaintop (or hilltop) location. Over a year ago I decided that I needed some good filters for ADS-B reception on mountaintops. Am rebuilding it now to put back on the hill in the next week or two. It’s windy as heck out, and the temperatures are in the mid-50’s, but the sun is warm. On this fine day, there’s plenty of people walking the ramp.
This what I call “the bowl”, where Caterpillar dozers not only moved millions of tons of rock back and forth for test and fun, but also cut the 20%-grade, ~0.6 mile long ramp that climbs north out of the bowl and then descends into the White Tank park boundaries. While Verrado continues to inch its way up the lower portions of the road, it’s unlikely it’ll ever get up this far. Verrado’s north end currently ends at the golf course the tower road is the wide diagonal that heads northwest into the narrows up-canyon. And the White Tank road was part of the testing arena. The cool thing about the White Tank road is it goes through the old Caterpillar proving grounds, where they pitted Caterpillar bulldozers against the mountain. Time-lapse video of the drive between I-10 Verrado offramp to and from the peak
#Piaware better than planeplotter Pc#
The Windows PC there had apparently died a while back, the ADS-B link failed at the beginning of April, so it was time to fix things. This morning I went up to check on the radio site on the east ridge where I have an ADS-B receiver and a railroad data receiver setup.
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