Unique agency IDAbbreviationFull nameCountryStation(s)
NMANMANorwegian Mapping AuthorityNorway (NOR)
NOANOANational Observatory of AthensGreece (GRC)
NPLNPLNational Physical LaboratoryUnited Kingdom of Great Britain and Northern Ireland (the) (GBR)
NSGFNSGFNERC Space Geodesy FacilityUnited Kingdom of Great Britain and Northern Ireland (the) (GBR)
NULPNULPNational University "Lviv Polytechnic"Ukraine (UKR)
OCAOCAObservatoire de la Côte d'AzurFrance (FRA)
OMPOMPObservatoire Midi-PyrénéesFrance (FRA)
OPGCOPGCObservatoire de Physique du Globe de Clermont-FerrandFrance (FRA)
OREMEOREMEObservatoire de Recherche Méditerranéen de l’EnvironnementFrance (FRA)
OSOSOrdnance SurveyUnited Kingdom of Great Britain and Northern Ireland (the) (GBR)