Some considerations in support of solid propulsion for space debris disposal.

Some considerations on the use of solid rocket motors for space debris disposal are presented. From the synthesis of a de-orbit sample mission and a tradeoff study on costs and benefits, a solid propellant unit for end-of-life missions and debris in-space disposal missions is evaluated. The enhanced operation flexibility, the propellant development and an advanced ignition concept granting multiple and independent firing capability of a new solid propulsion concept are discussed.

PRODROMI SULLE STIME CATASTALI

CRITICAL ANALYSIS OF SHORELINE LOCALIZATION METHODS BY MEANS OF AERIAL OR SATELLITE IMAGERY ON MEDITERRANEAN SANDY BEACHES

Shoreline localization is fundamental for designing and planning shore protection works as well as for managing and monitoring various anthropic activities along the coast. The sea-land boundary, however, changes continually with time because of waves and tides, which makes the shoreline detection complex and dubious and the boundary line finally assumed can only be conventional. In the last few decades the use of several geomorphologic indicators has been proposed, such as the berm above sea level, the groundwater exit point, historic high tide levels, etc., but the aim has not been achieved yet. Among the methods used, analysis of aerial and satellite imagery is common, in particular when…