Figure A4.
Simulating the HF signal path from Xi’an to eight receivers using ray tracing method. (a) 3D ray tracing path; (b) 2D ray tracing path.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.