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<title>AAS 98-173</title><body BGCOLOR="ffffff"> <h2>AAS 98-173</h2> <h2>THE 1997.0 CNUCE ORBITAL DEBRIS REFERENCE MODEL</h2> <h4>C. Pardini, L. Anselmo, A. Rossi - CNUCE/CNR, Italy; A. Cordelli - Consorzio Pisa Ricerche, Italy; P. Farinella - Universitai di Pisa, Italy</h4> <h2> Abstract </h2> Today earth mission planning and operations must deal with a problem mostly ignored just twenty years ago: non-catalogued space debris. In order to understand the origin and distribution of the artificial debris in the 0.1-10 cm size range, we carried out a massive effort to estimate the contribution of the historical events able to produce a large number of particles. The sources considered were 140 spacecraft and upper stages breakups and the liquid sodium-potassium coolant leaked from 16 Soviet radar ocean reconnaissance satellites. The resulting 1997.O CNUCE Orbital Debris Reference Model (CODRM-97) includes more than 52 millions of particles heavier than 1 mg. <P><A HREF="http://www.space-flight.org/AAS_meetings/1998_winter/sessions.html">Back</A>