#rtl-sdr

[ticcitober]

musical satellite telemetry?

hey so like way way WAY off topic but some of you may remember my satellite posts a bit back and i'm still doing that sort of thing because it keeps my brain occupied, i was testing an antenna that's basically an X shape made for UHF (200-400ish MHz) and i picked up.. whatever this is

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it seemed to disappear after i recorded it, the whole tone burst was only about 3 more seconds but i only noticed it about half way through. this seems like something exceptionally old or just a beacon signal, since from what i know about data modulation this is both too short and too slow to be much of anything. its reminiscent of transit 5b5 almost, but definitely isn't. i'm FAIRLY certain it is a satellite because of the significant Doppler curve (esp visible by me chasing it with the tuner window) i received this around 10:33 AM in north america, ohio specifically. 4.2 kHz bandwidth, FM

throwing it on here as a hail mary because i've never seen anything even remotely similar before, will continue to look for it again

(the image was stretched by playing the recording back at half speed with a high waterfall framerate)

[13121312131213121312]

Decoded images from the NOAA-18 satellite

[skywavelinux]

Skywave Linux v5 is Now on Debian Sid!

Enjoy shortwave radio and overseas broadcasts, no matter where you are. Skywave Linux brings the signals to you. Broadcasting, amateur radio, maritime, and military signals are available at your fingertips.

Skywave Linux is a free and live computing environment you boot from a flash drive on your PC. Start it up, pick a radio server somewhere in the world, and tune in some stations.

Skywave Linux brings you the signals, whether or not you have a big outdoor antenna or can afford an expensive communications receiver. Hundreds and hundreds of volunteer operated radio servers are on the internet, which let you tune the airwaves and pick up broadcasts in excellent locations and on high performance equipment.

If you are into FT-8, PSK-31, JT-65, or other digimodes, you can decode the signals in Skywave Linux. It also has tools for decoding weather satellites, ACARS, and ADS-B signals.

Not only is Skywave Linux a prime system for software defined radio, but also for programming and coding. It has the Neovim editor and support for several programming languages: Python, Lua, Go, and Javascript. It is a great system for Web developers.

Debian Sid is now the base operating system which Skywave Linux builds upon. It is debloated, tuned, and tweaked for speed, so that you get the best possible computing performance. It works nicely on old laptops; it is super fast on a multi core, high spec PC.

For shortwave listening, weather satellite decoding, or airband monitoring, Skywave Linux is the system you want!

[delightedcrow]

Apptober: 2020 Edition

WHELP I don’t know why I expected October to go differently than the rest of this year but I’m still somehow shocked at how much I did NOT get to. My poor Apptober project may not have gotten the love it deserved this year, but sometimes that’s just how the raspberryPi crumbles.

RTL-SDR: Tinkering With Radio Waves

On the upside I did enjoy my brief dive into the research-hole of learning about Software Defined Radio. AdaFruit especially has some excellent resources that are very accessible to beginners:

Getting Started with RTL-SDR and SDR-Sharp and CubicSDR

Build a radio scanner from a RaspberryPi

I don’t know why tuning into radio stations using software is so much fun considering you can get a handheld radio scanner pretty much anywhere... but somehow it is.

And Now: Sleep

So that’s it, a happy little research project for this year’s Littlest Apptober.

Shoutout to everyone struggling with the motivation and energy to finish projects right now, may your expectations for productivity be tempered with judicious self care 😉

[skywavelinux]

Skywave Linux 3.0 is released. This version has a different look, now using the MATE desktop environment. It is efficient and has visual appeal. We're now on the Xanmod Kernel 4.13, which makes for a responsive and stable base system. Audio now starts as a plain PulseAudio system, without plugins, for greater hardware compatibility. More wifi drivers are also included in Skywave Linux 3.0. Multiple desktops are enabled, so users can de-clutter and organize their activities on the system. As to the software defined radio applications, we now have four sources of remote servers: WebSDR, OpenWebRX (KiwiSDR), QtRadio/HPSDR, and RemoteSDRClient (SDRAnywhere). The latter is the newest and connects to shared RFSPACE radios. RTLSDR applications are now moving into new capabilities: simultaneous multichannel monitoring, data logging, and ability to stream audio to shoutcast servers. ACARS and VDL Mode 2 are now decodable, with logging. Bleeding-edge support for ADALM-PLUTO devices has been added. Kodi has received some updates and continues to offer streams from thousands and thousands of sources. Those stations sound great with the dynamics and EQ processing in PulseEffects. Overall, this version of Skywave Linux does more, makes better use of system resources, and is a joy to use.

[tsubakicraft]

SDRアプリケーションの続き

３つのアプリケーションをしばらく使ってみましたがSDR++が一番使い易い感じがしました。FMのラジオ放送を聴いた程度ですが。 航空無線、船舶無線、極軌道衛星の電波を受信しているのはわかりましたが、「これがその電波なんだなぁ」ということがわかるだけで、その処理方法が現時点ではよくわからない。 もう少し勉強してから色々試します。

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[freevpns]

RTL-SDR to Harvest Aero Radio Sigs

An A330 on short final, just about to flare. You can intercept its voice and data radio signals with a properly set up RTL-SDR! Voice on the VHF-Airband is an easy catch. So is ACARS data, whether in the old signal format or the new VDL Mode 2. Know what is going on. See the book "Airband Radio on the RTL-SDR" for tips, tricks, do's and dont's for using software defined radio to harvest aero signals en masse.

[geektechsailor]

Pisugar S: Battery for Raspberry Pi zero by PiSugar Kitchen on Tindie

PiSugar S is a complete UPS with a continuous output capability of 5V 2A.

I picked up one of these to provide UPS power for my Raspberry Pi Zero 2 Inmarsat receiver project. I wanted an embedded Inmarsat receiver aboard S/V Mon Nég. So an RTL-SDR and Raspberry Pi seemed to be the perfect pair to start with.