2014/04/14 by Richard Kaye, Kaye, Richard
Engineering · Medicine · Physics and Astronomy · #Calibration and Measurement Techniques #Cardiovascular Health and Disease Prevention #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optical Polarization and Ellipsometry #Space Physics (physics.space-ph) #astro-ph.IM #physics.space-ph
paper · pdf · doi:10.48550/arxiv.1404.3632
Introductory paper with 4 figures
arxiv created 2014/04/14 · openalex publication_date 2014/04/14 · arxiv updated 2014/04/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper presents an introduction to Chapman's theory of a production layer in the ionosphere relevant to the monitoring of VLF signals and Sudden Ionospheric Distubances (SIDs). It shows how the diurnal pattern of VLF signal strength can be derived, and how this pattern may be fitted to VLF signal strength measurements. It also shows through an example some of the possible problems for fitting this diurnal pattern (the fact that D-layer height cannot always be derived directly from measurements) and some of the advantages when a `fit' has been obtained (increased sensitivity of the instrument without any changes to hardware).