NEXA is a research and advanced development project aiming at the development of a generic software platform for real-time and post-process trajectory determination. The platform, also named NEXA, will be GeoNumerics' future navigation software platform.
The NEXA architecture concept is similar to that of GENA (separation between a generic platform and model components). GENA is GeoNumerics' generic and extensible network adjustment system.
NEXA will be a tool to compute static and kinematic solutions from observations made by GNSS receivers, inertial measurement units and other navigation instruments.
The NEXA research deals with advanced prediction, filtering and smoothing techniques based on but different from those of the classical Kalman Filter (KF) and Iterated Extended Kalman Filter (IEKF) and of its many different varieties and flavors.
The ATENEA project aimed to integrate GNSS, INS and LiDAR observations to perform precise and accurate navigation and positioning in general outdoor environments, from urban canyons to open areas. The ATENEA approach to navigation and positioning was of particular interest for a wide range of high precision tasks in difficult environments. ATENEA demonstrated the potential of INS/GNSS/LiDAR integration by being rehearsed and tested in the area of kinematic surveying for urban mapping.
Urban mapping with LiDAR techniques -the so-called terrestrial mobile mapping- is already an active domain, but is today only viable using high-end systems with a unitary cost in the order of 800 k€. On the technical level, the orientation of LiDAR instruments and the georeferencing of the scanned objects is provided nowadays by loosely or closely coupled INS/GPS integrated systems, leading to suboptimal performance in urban areas with poor satellite visibility and harsh multipath conditions.