| Abstrakt: |
This article from Linux Format offers a tutorial on engaging in radio astronomy using a PC audio system and free software. It explains that simple equipment, such as a PC's internal audio system, an antenna, and software, can be used to receive radio signals from the aurora. The article provides instructions on setting up an antenna and discusses the different frequencies in the radio spectrum. It also explores various types of natural VLF signals, such as sferics, tweeks, whistlers, and the auroral chorus. The importance of the PC's audio circuitry or an external soundcard for receiving signals in the higher part of the VLF band and LF band is emphasized. The article suggests using WebSDRs as an alternative option for receiving VLF/ULF signals and provides a list of WebSDRs that cover the VLF band and below. It explains how WebSDRs present signals audibly and visually through a waterfall display. The article mentions software options for processing signals in real time, such as Myriacat, Audacity, VLF Receiver Software Toolkit, and GNU Radio. It concludes by encouraging readers to experiment and explore different solutions and discusses the types of signals that can be heard, including regular sferics and man-made signals. [Extracted from the article] |
