Power system simulation of low orbit spacecraft: The eblos computer programme

This paper describes one approach to model spacecraft power systems. Modelling of solar array, batteries and power conditioning units is achieved for the simulation and analysis of in-flight performances of satellite power systems. The programme EBLOS operates from a minicomputer and at present deals with heliosynchronous orbits. However, for a maximum of flexibility, its design has been based on two features: a modular structure copied on the natural structure of power system and a nodal description input. The outputs are given in a form compatible with real in-flight measurements. The programme is described and validated against the ERS-1 Project.