Echoes: An RTL-SDR Tool for Meteor Scatter Detection
Thanks to "gmbertani" for letting us know about his recently released RTL-SDR compatible software called "Echoes". Echoes is a Windows, Linux and Raspberry Pi/Arch compatible tool that can be used together with an RTL-SDR and appropriate antenna to monitor for meteor scatter detections.
Meteor scatter works by receiving a distant but powerful transmitter via signal reflections off the trails of ionized air that meteors leave behind when they enter the atmosphere. Normally the transmitter would be too far away to receive, but if its able to bounce off the ionized trail in the sky it can reach far over the horizon to your receiver. Typically powerful broadcast FM radio stations, analog TV, and radar signals at around 140 MHz are used. By listening to these signal blips it can be possible to estimate the number of meteors falling.
Below we paste the official description and feature list of Echoes, and at the end is a video demonstrating Echoes in action:
Echoes it's a radio spectral analysis software for RTL-SDR devices, designed for meteor scattering purposes.
Echoes doesn't demodulate neither decode any human-made signal. Its main goal is to analyze and record the total power of natural signals and generate screenshots and tabular data (CSV, GNUplot) output in presence of particular peaks in a selected narrow range of frequencies. Since there is no demodulation, there is no provision for audio listening, except for a notify sound when an event has been recorded.
- Captures waterfall spectra as PNG screenshots and statistics data files.
- Optionally generates GNUplot data files
- Multiple instances can manage separate dongles plugged in the same computer
- Three operating modes: continuos (records data only), periodic (captures data and screenshot every X seconds) and automatic (record data and screeshot each time a customizable (S-N) treshold is exceeded)
- HTML report production
- Installers ready for Windows7++ and RPMs / SRPMs for Linux
- xz binary package for Raspberry PI / Arch distro
- It can run headless, recording GNUplot and statistic data only