Tailored Usage of the NEC SX-8 and SX-9 Systems in Satellite Geodesy

M. Roth, O. Baur () and W. Keller
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M. Roth: University of Stuttgart, Institute of Geodesy
O. Baur: University of Stuttgart, Institute of Geodesy
W. Keller: University of Stuttgart, Institute of Geodesy

A chapter in High Performance Computing in Science and Engineering '10, 2011, pp 561-572 from Springer

Abstract: Abstract In the context of space-borne gravity field recovery, in recent years the implementation of tailored analysis algorithms has gained considerable significance. Both the optimization of individual software modules and the efficient parallelization of the procedures as a whole are key to access state-of-the-art science results within reasonable time frames. As such, HPC technologies play an important role in modern satellite geodesy. Typically, space-borne geodesy requires the estimation of tens of thousands of unknown gravity field parameters from tens of millions of observations. In order to assemble and solve the (linear) systems of equations in terms of a least-squares adjustment, we adapted our algorithms to the NEC SX-8 and SX-9 systems. We present implementation details and runtime results using the NEC systems as single-node architectures. As a result, compared to previous implementations, we accelerated design matrix assembly by a factor of ten. Moreover, we parallelized our algorithms successfully on both systems.

Keywords: High Performance Computing; Gravitational Gradient; Satellite Geodesy; Gravity Gradiometry; Normal Equation System (search for similar items in EconPapers)
Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-15748-6_41

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DOI: 10.1007/978-3-642-15748-6_41

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