Published online by Cambridge University Press: 23 November 2009
Navsat is a civil satellite-navigation system which was presented by the European Space Agency. It is still at the system definition phase as distinct from the pre-operational stage, but since the original presentation it has been the subject of studies which have included analysis and synthesis of the main parameters.
The underlying principles of the concept as initially described by Rosetti remain unchanged but sufficient progress has now been made to predict the capability of the system in satisfying a number of objectives in the civil fields of navigation, position fixing and survey.