Abstract
A RECENT article by Edwards et al.1 suggested that observations of the phase delay suffered by VLF radio waves propagating over large distances in the Earth–ionosphere waveguide revealed the presence of ionization in the night-time lower ionosphere produced by X-rays from the strong X-ray source, Scorpius XR-1. and other weaker sources in the vicinity of the galactic centre. These observations were taken on the 20 kHz transmissions from WWVL, Boulder, recorded in New Zealand.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
