A space mission operations system is a complex network of human organizations, information systems, deep-space communication systems and spacecraft hardware. As in other organizations, one of the problems in mission operations is managing the relationship of the mission information systems to how people actually work (practices). Brahms, a multi-agent modeling and simulation tool, was used to m...

Introduction: Polar “cold spots” – regions of unusually low brightness temperature – affect the Martian climate by reducing the outgoing heat flux, which is balanced by the latent heat of CO2 sublimation. Since the Viking era, their cause has remained uncertain. Using radiometric observations from the Mars Climate Sounder (MCS) during southern winter, we previously reported that transient cold ...

Abstract In this study, modeling of discharge was performed in compound open channels with non-prismatic floodplains (CCNPF) using soft computation models including multivariate adaptive regression splines (MARS) and group method data handling (GMDH), then their results were compared the multilayer perceptron neural networks (MLPNN). addition to total discharge, separation between floodplain ma...

NPLD reflectors and no evidence for basal unit. 2.5 μs is approximately 420 m in water ice. ABALOS MENSA, PLANUM BOREUM, MARS: A CONSTRUCTIONAL, AEOLIAN HISTORY DERIVED FROM RADAR AND OPTICAL STRATIGRAPHY, REINFORCED BY ATMOSPHERIC MODELING. T. C. Brothers, J. W. Holt, A. Spiga, University of Texas Institute for Geophysics, Jackson School of Geosciences, University of Texas, Austin, TX 78758 tc...

Long duration and complex mission scenarios are characteristics of NASA’s human exploration of Mars, and will provide unprecedented challenges. Systems reliability and safety will become increasingly demanding and management of uncertainty will be increasingly important. NASA’s current pioneering strategy recognizes and relies upon assurance of crew and asset safety. In this regard, flexibility...