Performance of Analytic Orbit Propagators on a Hypercube and a Workstation Cluster

In this paper we discuss the benefit of par allel computing in propagating orbits of ob jects. Several analytic methods are now in use operationally . We will discuss three such schemes. We demonstrate the benefit of par allelism by using an INTEL iPSC hyper cube and by using a cluster of Unix based workstations running Parallel Virtual Machine PVM. The software PVM allows a heterogeneous set of networked workstations to appear as a multicomputer. We will show that one can achieve near 100% efficiency on the hypercube