GNSS Glossary

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NA or N/A :

Note Applicable

NAS :

National Airspace System or National Air Space

NATS :

National Air Traffic Services (UK)

NAV :

NAVigation sub-system

NC :

Non Compliant

NCC :

Network Control Centre

NCM :

Network Control Management

NCR :

Non-Conformance Report

NCRB :

Non-conformance Review Board

NI :

Non Integrity

NIHID :

Non-Integrity Hazardous Invalid Data

NLES :

Navigation Land Earth Station

NLES-1B :

Backup to NLES-R

NLES-2B :

Backup to NLES-A

NLES-A :

NLES – Aussagel France

NLES-R :

NLES – Riesting Germany

NLESRD :

NLES Requirements Document

NM :

Nautical Mile

NMC :

Network Management Center

NMF :

Network Management Facility

NOC :

Network Operations Centre

NOCC :

Network Operation Control Centre

NOTAM :

Notice To Airmen

NPA :

Non Precision Approach

NPL :

National Physical Laboratory

NSA :

Navigation Service Availability

NSE :

Navigation System Error

NSV :

Number of Satellite Vehicles

NTW :

Network

NTWRD :

Network Requirements Document

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