Analytical methods for prefiltering of close approaches between space objects

Abstract

In the history of space, for the first time an operational US communications satellite Iridium 33, in low-Earth orbit was struck and destroyed by the collision of a long defunct Russian communications satellite COSMOS 2251 on 10 th February 2010. It is necessary to understand the circumstances of this collision for avoiding similar incidents in the future. In this direction a detailed conjunction analysis of all space objects is essential. Since a large number of objects are orbiting in space, it is very difficult to find out the close approach for all objects with simulations. Hence, a study related to the prefiltering of close approaches between space objects using analytical techniques is carried out in this paper. It is found that the presented methodology with prefiltering techniques is effective in reducing the number of objects for simulations.

Effect of poly(ethylene‐co‐vinyl acetate) additive on mechanical properties of maleic anhydride‐grafted acrylonitrile butadiene styrene for coating applications

“…Acrylonitrile butadiene styrene (ABS) is one of the extensively used engineering thermoplastic ter‐copolymers. It consists of an elastomeric segment of polybutadiene (PB) dispersed in a rigid plastic poly(styrene acrylonitrile) matrix . The fascinating properties of ABS include high impact strength, excellent processability, very low conductivity, and superior mechanical properties .…”