N
| NAIC | National Astronomy and Ionosphere Center (USA) | NARFA | National Allied Radio Frequency Agency | NAS | National Academy of Sciences (USA) | NASA | National Aeronautics and Space Administration (USA) | NASDA | National Space Development Agency of Japan | NATO | North Atlantic Treaty Organization | NAVSTAR | see GPS | NAVTEX | Narrow-band direct-printing telegraphy system for transmission of navigational and meteorological warnings and urgent information to ships | NESS | National Environment Satellite Service (of NOAA) | NEST | Nuclear Emergency Search Team (USA) | NFRA | Netherlands Foundation for Research in Astronomy (NL) | NGO | Non Governmental Organization | NGSO | Non-Geostationary Satellite Orbit | NIST | National Institute of Standards and Technology (USA) | NIVR | Nederlands Instituut voor Vliegtuigontwikkeling en Ruimtevaart (NL) | NJFA | NATO Joint Civil/Military Frequency Agreement | NMR | Network Meter Reading | NNSS | Navy Navigational Satellite System (USA) | NOAA | National Oceanographic and Atmospheric Administration (USA) | NRAL | see JBO | NRAO | National Radio Astronomy Observatory (USA) | NRC | National Research Council (USA) | NSF | National Science Foundation (USA) | NTIA | National Telecommunications and Information Administration (USA) | NV/NG | Non-voice/Non-geostationary | NWS | National Weather Service (USA) | |