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.
Measurement-to-track association: a confusing case and a simple case. Dots represent measurements (gray indicating the clutter), while the curves tracks; the same color between a curve and a dot represents the real association between the corresponding track and measurement.
