Metrological Control Of Global Navigation Satellite System (GNSS) Equipment

In recent years various measurement systems have been developed in geomatic applications, all of them based on massive data acquisition in real-time with high metrological quality. New measuring systems provide abundant spatial information and offer significant advantages in many applications in the field of aerospace, automotive, reverse engineering, deformations control, etc. The use of some or other systems will depend on requirements that work or project demands, but in all cases, the measurement systems must regularly have a metrological checking in order to estimate measurement uncertainty and assured its traceability. It could be argued that Global Navigation Satellite System (GNSS) is the main tool used both in those geomatic applications that we must achieve the maximum accuracy. This paper presents the necessity of metrological control of a kind of equipment as specific as that used in the GNSS.