| GHM | Gauss-Helmert Model |
| GNSS | Global Navigation Satellite System |
| IVP | InVariant Point |
| SLR | Satellite Laser Ranging |
| TLS | Total Least-Squares |
| VLBI | Very Long Baseline Interferometry |
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.