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Orbital flux integrations: Parameter values for effective computer time reductionsTo improve computer utilization and to reduce the cost of orbital flux integrations, the effects of integration parameters 'duration' (T) and 'stepsize' (delta t) on integration results were investigated. Over given ranges of T and delta t, and within specified acceptable accuracy restraints, optimal values of these parameters were established for circular subsynchronous trajectories, in terms of the variables altitude (H) and inclination (i). It is shown that (1) above a certain statistically important value, duration is independent of both h and i; (2) stepsize has a relative altitude dependence; and (3) stepsize is not a function of inclination. The substantial savings in computer time are discussed along with the possibility of greater savings by relaxing accuracy restrictions while not exceeding the minimum model-associated uncertainty factors of the environments.
Document ID
19750009910
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Stassinopoulos, E. G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1974
Subject Category
Computer Programming And Software
Report/Patent Number
NASA-TM-X-70823
X-601-74-349
Accession Number
75N17982
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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