A Nonlinear Model for Equatorial Spread F: Irregularity and Scintillation Calculations.
Abstract
It is shown, that a simple nonlinear model based upon plasma equations of motion and a wave equation for radio propagation is capable of predicting plasma irregularities and scintillations at the equator. The irregularities develop from a linear convective instability on the bottom of the F layer. Depleted regions, or bubbles, form and rise nonlinearly through the F peak, disturbing the top of the F layer. The equations of motion are integrated numerically, and then the parabolic equation is solved for propagation of a 300 MHz wave through the plasma. It is assumed that a modest total electron content of 5 x 10 to the 16th Power M(-2). From the radio wave solution scintillation indices are extracted as a function of time. Approximately two hours after the instability starts, S4 reaches 0.48, and the log power variance reaches 3.1 dB.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1976
- Accession Number
- ADA030223
Entities
People
- A. J. Scannapieco
- B. E. Mcdonald
- Sidney L. Ossakow
Organizations
- United States Naval Research Laboratory