Modeling Amateur Radio Soundings of the Ionospheric Response to the 2017 Great American Eclipse
Abstract
On 21 August 2017, a total solar eclipse traversed the continental United States and caused large-scale changes in ionospheric densities. These were detected as changes in medium-and high-frequency radio propagation by the Solar Eclipse QSO Party citizen science experiment organized by the Ham Radio Science Citizen Investigation (hamsci.org). This is the first eclipse-ionospheric study to make use of measurements from a citizen-operated, global-scale HF propagation network and develop tools for comparison to a physics-based model ionosphere. Eclipse effects were observed /- 0.3 hr on 1.8 MHz, /- 0.75 hr on 3.5 and 7 MHz, and /- 1 hr on 14 MHz and are consistent with eclipse-induced ionospheric densities. Observations were simulated using the PHaRLAP raytracing toolkit in conjunction with the eclipsed SAMI3 ionospheric model. Model results suggest 1.8, 3.5, and 7 MHz refracted at h >= 125 km altitude with elevation angles theta >= 22 degrees, while 14 MHz signals refracted at h < 125 km with elevation angles theta < 10 degrees
Document Details
- Document Type
- Technical Report
- Publication Date
- May 29, 2018
- Accession Number
- AD1101020
Entities
People
- A. J. Gerrard
- E. S. Miller
- G. D. Earle
- H. W. Silver
- J. D. Katz
- J. S. Vega
- Joseph D. Huba
- M. L. Moses
- M. L. West
- N. A. Frissell
- Philip J. Erickson
- R. B. Gerzoff
- S. W. Gunning
- W. Liles
Organizations
- United States Naval Research Laboratory