Statistical Studies of High-Power Whistler Wave Transmissions from a Space-Borne Transmitter
Abstract
The extremely high energy electrons in the radiation belts produced by nuclear explosions or space weather can severely negatively impact the performance and longevity of the Air and Space Force space assets . Remediation of these energetic electrons is therefore of great interest. A space-borne very low frequency (VLF) wave transmitter is among the most efficient approaches to directly remediate the radiation belt particles. Given that the currently available theoretical models for whistler-mode transmission in magnetized plasma make predictions that differ many orders of magnitude, the fundamental processes involved in the interaction between the active transmitting antenna, the surrounding plasma, and the waves transmitted cannot be understood purely via theoretical investigations. The overall objective of the project is to provide a comprehensive understanding of the antenna-plasma interaction processes and the critical factors that control the antenna transmission performance. We propose to conduct a series of statistical studies and develop empirical models of transmission power and angular distribution of energy and amplitude under various transmission frequencies, plasma conditions, and antenna orientations in the magnetosphere and radiation belts based on the space experiments carried out by the DSX mission. Furthermore, we will study the propagation characteristics of the transmitted waves. Such studies will benefit our understanding of the physical processes governing the VLF wave transmission, and guide future radiation belt remediation initiatives. The outcome of the statistical analysis will provide ranges of parameters for the optimized design of the space-borne VLF transmitter and antenna system for future Air Force satellites similar to DSX mission.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 14, 2024
- Source ID
- FA95502310719
Entities
People
- Paul Song
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Massachusetts