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.
In each coding cycle, the black bar denotes the coding flickering epoch (t 1) for the first frequency (f 1), the gray bar denotes the coding flickering epoch (t 2) for the second frequency (f 2), and the white rectangle denotes the break time epoch (t 3).
