Glossary of Terms

Understand basic Public Safety definitions and terms.

GNSS

Definition:

Global Navigation Satellite System. Can refer to GPS (US), GLONASS (Russia), Galileo (EU).

A-GPS (Assisted-Global Positioning System)

A-GPS (Assisted-Global Positioning System) is a system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a...

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GLONASS

Global Navigation Satellite System. Operated by the Russian Aerospace Defence Forces. It provides an alternative to Global Positioning System (GPS)...

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GSM

Global System for Mobile Communications. The standard digital cellular phone service. GSM follows a set of ETSI standard specifying the...

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GIS

Geographic Information System. An automated mapping system that allows analysis and graphic display of geographic features and attributes...

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