Skywave Linux v2.0 Software Defined Radio for Online Listening
skywavelinux-2.0.iso Release Date (10/07/2016): md5sum: 291c41afdf4edb5bba37923bab494fe9 sha1sum: bc837f9e144b9578e7aae1957e914ad3d90dbdd1
Welcome to Skywave Linux version 2.0. This is an operating system using bleding-edge technology to access broadcast, utility, military, and amateur radio signals from almost anywhere in the world, without regard to state media controls or censorship. Skywave Linux connects to a large and growing network of state-of-the art software defined radio (SDR) servers, making it possible to experience high performance SDR operation without large antennas or setting up a station on-site. All you need to do is boot the system on a computer with internet connectivity. Skywave Linux can also operate numerous types of SDR hardware. Downloading, installing and configuring SDR software can be difficult for many computer users; Skywave Linux eliminates the hassle by including several applications installrd, configured, and ready to run.
Supported SDR Types
Several types of software defined radios are supported by Skywave Linux:
WebSDR servers are located all over the world and provide easy access to the global airwaves through the web browser. In Skywave Linux, use the application called "WebSDR and OpenWebRX Servers" to call up the best servers. A modern web browser is all one needs to enjoy clean, stable, AM / FM / SSB reception using this cutting edge technology. Servers at the University of Twente (NL) and G4FPH, Stafford (UK) are particularly good.
OpenWebRX servers are a new type of internet accessible SDR, growing rapidly in number. Use the WebSDR and OpenWebRX Servers application to access several excellent sites around the world, such as Victoria, British Columbia (Canada), Overland Park, Kansas (USA) or Warrenton, Virginia (USA). OpenWebRX is installed in Skywave Linux and capable of running RTL-SDR, Softrock, SDRPlay, and other hardware.
RTL-SDR devices used on the local system. Just plug-and-play! CubicSDR and Gqrx are the main applications for receiving AM / FM / SSB modes. QtRadio (via the RTL-SDR controller script) offers advanced noise reduction and very high quality AM / SSB / CW reception, plus FM up to a 200 kHz bandwidth. Dump1090 (Mutability version) is for monitoring aircraft ADS-B transmissions. ADS-B mapping is available from Dump1090's built in webserver.
Ettus Research USRP devices, offering advanced features and high performance. Their hardware can cover frequencies from DC through 6 GHz in a diverse array of signal modes.
HPSDR hardware, for internet accessible receivers, is covered by QtRadio. Several servers, operated by volunteers around the world, are online 24 hours a day, and cover spectrum from LF through low VHF. Performance is excellent from these servers, and the radio configuration options in QtRadio make for a "professional grade" operating experience. To find servers, use the menu: Receiver > Quick Server List.
SDRPlay, Airspy, and BladeRF devices offer higher performance than RTL-SDR dongles. These devices feature stable and clean oscillators, sensitive front end circuitry, superior RF filters, broader RF bandwidths, and higher resulution ADC converters. CubicSDR and Gqrx are the applications built for running these devices.
For decoding RTTY, CW, PSK, WSJT, WSPR, RDS, and other digital radio transmission modes, the Fldigi the WSJT applications are installed. Simply start the applicatio and tune in a signal on the waterfall to decode. Weather satellite decoding is possible with the very capable WXtoImg application. Gpredict provides real-time satellite tracking data and doppler corrected tuning control for Gqrx. In some cases it may be necessary to use the Pulseaudio Preferences or Pavucontrol applications to configure the audio (output from the LADSPA audio processor plugins, networked sound, etc). Trunked radio systems may be monitored using SDRTrunk.
An experimental application, cudaSDR, expands support in Skywave Linux for High Performance Software Defined Radio. It offers automatic discovery of connected hardware and advanced operating features.
Conventional radio and video broadcast streams are also supported in Skywave Linux. Kodi Media Center provides access to thousands of music, talk, news, free-speech, and religious stations around the world. Editable playlists of IPTV and IPRADIO stations are located in the home folder.
Usage and Installation
Use Skywave Linux as you would use any live Linux system:
Burn it to a DVD and run it as a boot disc (slow).
Create a bootable USB or SD card using Universal USB Installer or YUMI (Windows users).
In Linux, create a bootable USB or SD card using Unetbootin.
In Linux, simply install a bootloader and copy the iso file to a USB or SD card.
Install it to the hard drive as the main operating system.
Skywave Linux is a 64 bit system, built on a base of Ubuntu 16.04 LTS, uses the Unity desktop environment, and draws on the capabilities of Ubuntu: software updating, graphics, system resource management, etc. It is the additional digital signal processing, networking, and signal decoding applications that set Skywave Linux apart from stock Ubuntu Linux. The default username is skywave and there is no password in the default system.
The radio software is largely compiled from source code and can be updated by end users with moderate computer skills, though Skywave Linux is designed for easy use by radio operators with basic computer skills. In fact, Skywave Linux was created to open the world of HPSDR and RTL-SDR operating to people who enjoy high performance radio but are not computer experts.
It may sometimes be advantageous for users to use encrypted connections which provide stronger privacy, security, and ability to circumvent censorship. For that purpose, the Bitmask and Lantern VPN applications are installed. In addition, basic PPTP and OpenVPN connections are included in the networking applet.
Skywave Linux thanks the talented developers who create Ubuntu, QtRadio, Cubic SDR, Dump1090, Fldigi, WebSDR, WSJT, and the many other components necessary for this distribution to exist. Skywave Linux also thanks the end users for selecting this distribution and hopes it is an asset to their radio monitoring endeavors.
Some parts of the world suffer from governance by regimes restricting the human right to freedoms of speech, including radio or electronic media access. If you are in such a restrictive place, and subject to punishment for listening to foreign media, military communications, or other signals available through Skywave Linux, you do so at your own risk. Be careful and do not get caught! Use a VPN to encrypt your internet activity. Shield and disguise your RTL-SDR hardware from rats and snitches. Skywave Linux, its developers and distributors, are not responsible for the monitoring activities of end users. We will never discourage accessing the network of software defined radio servers, but do encourage self-protective measures by anyone living under restrictive regulation. Skywave Linux is not endorsed by or affiliated with Ubuntu / Canonical. Ubuntu is simply used as a foundation for building Skywave Linux.
Version 1.6: Added OpenWebRX 0.14 Added SDRplay support (RSP_MiricsAPI-1.9.4) Added SDRTrunk 0.2.0 Updated WebSDR Server List Upgraded Bitmask 0.9.2 Upgraded CubicSDR 0.1.28a Upgraded Firefox 47.0.b9 Upgraded gr-osmosdr 0.1.4 Upgraded Lantern 2.2.4 Upgraded libairspy 1.0.8 Upgraded libsoapysdr 0.4.3 Upgraded Rhythmbox Radio Station List Upgraded Linux kernel 4.2.0-36-generic Removed Cheese Removed Shotwell Removed Thunderbird Removed Ubuntu Web Browser
Version 1.5: Added Gqrx 2.5.3 Added Gpredict 1.4 Added WXtoImg 2.11.2 Updated WebSDR Server List Upgraded CubicSDR 0.1.26 Upgraded Firefox 45 Upgraded Fldigi 3.23.08 Upgraded Lantern 2.1.1 Upgraded WSJT-X 1.6.0 Upgraded Linux kernel 4.2.0-34-generic
Version 1.4: Changed default username and hostname to "skywave" Upgraded Firefox 43 Upgraded CubicSDR 0.1.4 Removed LibreOffice Activated Dump1090 phase-enhancement and oversampling options Added Java (OpenJDK) Runtime Environment 1.8.0 Added CudaSDR 0.3.2.13 with RTL_HPSDR support
Version 1.3: Ubuntu 15.10 base system, kernel 4.2.0-19-generic Upgraded Bitmask 0.9.1 Upgraded Firefox 42 Upgraded LibreOffice 5.0.2 Upgraded WSJT-X 1.6-rc1 Enabled pulseaudio daemon and networked sound Adjusted settings in QtRadio for Softrocks and RTL-SDR hardware Added Lantern 2.0.10 Added stations to Rhythmbox Added servers to WebSDR Server List
Version 1.2: Activated ZRAM kernel module for better performance Adjusted settings in QtRadio Added stations to Rhythmbox
Version 1.1: FM Broadcast RDS decoding via Redsea Added WSJT / WSPR weak signal digimodes Added Selectable WebSDR List Improved Softrock support in QtRadio