North Atlantic Oscillation

National Aeronautics and Space Administration

Goddard Institute for Space Studies

National Climatic Data Centre

National Centers for Environmental Prediction

Non Conformance Report

National Center for Supercomputing Applications

National Environmental Satellite Data and Information Service (USA)

Network Common Data Form

Norwegian Institute for Air Research

The National Institute of Meteorology and Hydrology (of Romania)

Near Infrared

National Meteorological and Hydrological Service

Nitrogen dioxide (Sauerstoffdioxid)

National Oceanic & Atmospheric Administration

NRT Ozone Profile

Next Generation of Polar Orbiting Environment Satellite System

NPOESS Preparatory Program

Near-Real-time

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Near Surface Humidity

NRT Total Column

NASA Water Vapor Project New Generation

SAF in Support to Nowcasting and Very Short Range Forecasting

Numerical Weather Prediction