NEXA is a robust non-linear least-squares generic sequential estimation engine. With NEXA, trajectories of any type –i.e., time series of parameters– can be computed from given  measurements (input data) and from the mathematical models that relate the measurements to the [unknown] parameters (input software).

A typical application of NEXA is the fusion of inertial measurements and satellite-to-receiver distances, a.k.a. INS/GNSS integration. NEXA can be used in real-time or post-mission modes. It can be used with real or simulated data for trajectory determination and system design respectively.

GENA is a robust non-linear least-squares generic network adjustment engine. With GENA, geodetic networks, photogrammetric and remote sensing blocks and any other type of network can be adjusted. Observations of different types can be arbitrarily combined into single large adjustments.

GENA is, as well, a simulation tool. It can be used to help design geomatic measurement instruments; in particular, remote sensing sensors and multi-sensor systems. It can be used to help design measurement campaigns.