Abstract
VLF waves at 3.85 kHz from the Siple, Antarctica, transmitter were continuously measured by electric and magnetic receivers on a sounding rocket as the waves propagated through the neutral atmosphere and into the ionosphere. The change from linear to circular polarization was clearly observed along with severe attenuation of the VLF signal in the D region. Interferometric measurements established the index of refraction and provided an independent calibration of the rocket‐borne receivers. An upper bound on the VLF power radiated is estimated to be 1.7×10³ W during a period when the antenna was driven at 115×10³ W. The power estimated to be entering the ionosphere is between 3 W and 12 W and depends on assumptions concerning the geometrical distribution of wave power.
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.
