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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Intelligent behavior for robotic agents requires a careful balance of fast reactions and deliberate consideration of long-term ramifications. The need for this balance is particularly acute in space applications, where hostile environments demand fast reactions, and remote locations dictate careful management of consumables that cannot be replenished.
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The Joint Effort for Data assimilation Integration (JEDI) is a collaborative development led by the Joint Center for Satellite Data Assimilation (JCSDA) in conjunction with NASA, NOAA and the Department of Defense (NAVY and Air Force). The (Sea-Ice Ocean and Coupled Assimilation) SOCA as one of the JCSDA projects, focuses on the application of JEDI to marine data assimilation. One of the goals of SOCA is to make use of surface-sensitive radiances to constrain sea-ice and upper ocean fields (e.g., salinity, temperature, sea-ice fraction, sea-ice temperature, etc.). The first elements toward an ocean/atmosphere coupled data assimilation capability within JEDI, with a focus on supporting and developing the assimilation of radiance observations sensitive to the ocean and atmosphere has been implemented. The direct radiance assimilation of surface sensitive microwave radiances focusing on Global Precipitation Measurement (GPM) Imager (GMI) for the SST Constraint and Soil Moisture Active Passive (SMAP) for the Sea Surface Salinity (SSS) has been the main focus. Also, in UFO the capability to calculate the cool skin layer depth and skin temperature has been implemented similar to the GEOS-5. It has been tested with GMI sea surface temperature retrievals. This is important because Satellite and in-situ observations of the Sea-Surface Temperature (SST) show high variability, including a diurnal cycle and very thin, cool skin layer in contact with the atmosphere, and Incorporating a realistic skin SST is essential for atmosphere-ocean coupled data assimilation.
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Tracking and communications system for Apollo spacecraft at lunar distances using S-band
Functional description of data transmission links required at Apollo S-band telecommunications and tracking stations
Computations and equations for accelerated flight and coasting flight navigation, and powered flight and midcourse guidance for manned spacecraft
Electronic relaxation of shock heated nonequilibrium argon plasma flow behind incident and bow shock waves
One-dimensional elastic wave problems treated by hyperbolic partial differential equations and analyzed by method of characteristics
Dimensionless differential corrections and proper coordinate system for generalized preflight guidance analysis
Electronic relaxation of shock-heated nonequilibrium argon plasma flow in microscopic- macroscopic treatment
Suboptimal adjoint-vector control theory for linearization of feedback control systems independent of nominal trajectory
Total cross sections for arbitrarily oriented dielectric circular cylinders used in obtaining extinction and polarization by realistically oriented interstellar particles, noting refractive index