| Ballistic Coefficient | |
| CA | Conjunction Assessment |
| Drag Coefficient | |
| EO | Electro-Optical |
| FS | Filter-Smoother |
| IERS | International Earth Rotation Service |
| ILRS | International Laser Range Service |
| LEO | Low Earth Orbit |
| LRA | Laser Retro-reflector Array |
| NORAD | North American Aerospace Defense |
| OD | Orbit Determination |
| OP | Orbit Prediction |
| RMS | Root Mean Square |
| SLR | Satellite Laser Ranging |
| TLE | Two-Line Element |
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.