The Wow! signal is a famous, strong, and unexplained radio signal detected in 1977 by the Big Ear radio telescope in Ohio, lasting 72 seconds and appearing to originate from the constellation Sagittarius. Its origin remains unknown, with some speculating that it could be an extraterrestrial technosignature. Upon reviewing the signal data, Astronomer Jerry R. […]| rtl-sdr.com
Videos from the WHY2025 (What Hackers Yearn) have recently been uploaded to YouTube, and there is one interesting talk by Jean-Michel Friedt titled "Passive and active RADAR using Software Defined Radio". RAdio-frequency Detection And Ranging (RADAR) aims at using electromagnetic signals for detecting target location and motion. We demonstrate in this talk various RADAR architectures […]| rtl-sdr.com
Thank you to Vinnie Moscaritolo for writing in and sharing with us PiCar, a project to develop a homebrew car radio head unit out of a Raspberry Pi and RTL-SDR. The advantage of PiCar over a standard vehicle head unit is that PiCar is not just a broadcast AM/FM tuner, but is also capable of […]| rtl-sdr.com
Recently, Owen Taylor, the CEO of WAKE (Worldwide AIS Network), wrote in to us asking if they could promote their project, which is a decentralized AIS aggregation network based on receivers like RTL-SDR. The twist compared to existing aggregators like marinetraffic.com is that WAKE aims to reward users via a crypto token and simultaneously solve […]| rtl-sdr.com
Recently, Sarah Rose Giddings (aka SignalsEverywhere) has been actively developing several radio and SDR based projects for Android, and she would like to provide an update on them. First, as mentioned in a previous post, Sarah has been developing APRS.chat, an online mailbox system for APRS messages sent over RF. She has also been making […]| rtl-sdr.com
Thank you to Paul Maine for writing in and sharing his latest tutorial video, which explains how Single Sideband (SSB) modulation works. In the video, Paul explains the concept and mathematical principles behind SSB by showing how to create an SSB receiver using GNU Radio and an RTL-SDR. Paul writes: Paul Maine “ The SDR […]| rtl-sdr.com
Thank you to Dennis Mantz @dennismantz for writing in and sharing with us the news that RF Analyzer V2.0 has been released for Android devices. RF Analyzer is a popular multimode Android app compatible with a vast number of SDRs, including the RTL-SDR. It also now supports the RTL-SDR Blog V4! To use the app, […]| rtl-sdr.com
Thank you to Meti for writing in and sharing his browsable archive of historical weather satellite data (further information here). The archive is designed to store weather satellite data, whether in baseband IQ format, frames, or images, for scientific, educational, or preservation purposes. With NOAA POES now fully shut down, the archive could be useful for individuals who didn't have the opportunity to decode a NOAA satellite for real, or perhaps for those who will want to relive their ol...| rtl-sdr.com
Thank you to Sarah Rose Giddings (aka Signals Everywhere) for submitting to us her latest project called aprs.chat. This is a web service that allows ham radio operators to have all of their incoming APRS (Automatic Packet Reporting System) messages (regardless of SSID) saved in history on the web platform. This will enable operators to never miss a message, even when their radios are turned off. The service works over the APRS-IS (APRS Internet Service) network, which bidirectionally connect...| rtl-sdr.com
Over on YouTube Talking Sasquach has recently tested custom firmware for the Flipper Zero that can entirely break the rolling code security system used on most modern vehicles. Rolling code security works by using a synchronized algorithm between a transmitter and receiver to generate a new, unique code for each transmission, preventing replay attacks and unauthorized access. In the past we've discussed an attack against rolling code security systems called RollJam, which works by jamming th...| rtl-sdr.com