An official website of the United States government
Here's how you know
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.
COMPARISON OF THE LATENCY OF THE DISPLAY OF AN US SCANNER AND VARIOUS GUIDANCE SYSTEMS. LATENCY IS MEASURED AS THE TIME DIFFERENCE BETWEEN MOVING A PHYSICAL OBJECT AND SEEING THE DISPLACEMENT ON SCREEN.