Matra

About: Matra is a based out in . It is known for research contribution in the topics: Signal & Detector. The organization has 1330 authors who have published 1216 publications receiving 17967 citations.

Heat transfer apparatus

Abstract: A reversible capillary pumped heat transfer loop for transferring heat between first and second locations (2,3) and comprising, at each location, a heat transfer unit (1) for evaporating a working fluid when the unit is required to remove heat and for condensing the working fluid when the unit is required to deliver heat, each such unit (1) including a capillary device (19,20) and one or more channels (10) associated with the capillary device for the collection of fluid from it when the unit is acting as an evaporator and for the feeding of fluid to it when the unit is acting as a condenser whereby each unit comprises a fluid reservoir (18) into which the capillary device extends, the combined volumes of the reservoirs and the amount of working fluid in the loop being selected to ensure that there is always sufficient liquid in the reservoir to keep the capillary devices saturated with liquid.

Videophone method and installation

Abstract: In order to set up a videophone communication from a calling videophone terminal to a called videophone terminal filtered by a telephone set, once a telephone communication has been set up between the terminals, over a CCBNT channel, a service message included in a message for freeing the CCBNT line is sent from the called terminal. This message contains a secret (unfiltered) direct call number for the called videophone. A connection over two type B channels is set up again directly, from the calling terminal, using the secret unfiltered call number.

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

Abstract: 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.

Heavy ion testing using the GANIL accelerator and compilation of results with predictions

Abstract: In 1988, Matra Marconi Space developed an irradiation test line at the GANIL accelerator to characterize the behaviour of electronic components under heavy ion exposure. The GANIL facility is now an operational system for such characterizations. The authors describe the GANIL characteristics. This accelerator can produce very high energy ions and so, allows experiments in air. The test system facilities (SEU, LU and BO) developed are also described. Finally, experimental results giving the LET threshold and Cross Section obtained in some of these studies and the CREME predicted upset rates in space are presented. >