A computational algorithm for sequential estimation
Algorithm for computing sequential least squares estimates with process noise
Dyer, P.↗
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Results for “DyEr”
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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On optimal control problems with discontinuities.
Optimal control problems with discontinuities, noting jump discontinuities in state variable derivative arising in bang-bang control problems
Dyer, P.↗
Comparison of preflight and postflight error analyses of Lunar Orbiter missions.
Lunar Orbiter missions pre- and postflight error analyses compared to estimate dispersions from reference trajectory
Dyer, J. P.↗
Optimization of control systems with discontinuities and terminal constraints.
Newton-Raphson function space algorithm for optimizing control systems with discontinuities and terminal constraints, discussing spacecraft examples
Dyer, P.↗
Optimization of control systems with discontinuities and terminal constraints.
Optimal control for systems with discontinuities and terminal constraints using Newton-Raphson algorithm /successive sweep method/
Dyer, P.↗
Evaluation of the LM guidance system performance over the approach terrain of five of the proposed Apollo landing sites - Apollo program
Evaluation of lunar module guidance system performance over approach terrain of five proposed Apollo landing sites
Dyer, D. A.↗
A study of landing radar antenna switching - Project Apollo
Landing radar antenna switching tradeoffs defining antenna switch point for one-phase guidance trajectory of lunar module
Dyer, D. A.↗
LM landing radar test for the F mission - Project Apollo
Determining test requirements for LM landing radar for F mission
Dyer, D. A.↗
AMTRAN system design and software description
Automatic Mathematical Translation language software for IBM 1130
Dyer, M. E.↗
Extension of square-root filtering to include process noise.
Square root filters algorithms based on covariance and invariance matrices extended to include process noise effects
Dyer, P.↗
A computational algorithm for sequential estimation
Modular component computational algorithm for sequential least squares estimation /filtering/ with process noise for straightforward computer code conversion
Dyer, P.↗
Technical management techniques for identification and control of industrial safety and pollution hazards
Constructive recommendations are suggested for pollution problems from offshore energy resources industries on outer continental shelf. Technical management techniques for pollution identification and control offer possible applications to space engineering and management.
Campbell, R.↗
Applicability of NASA contract quality management and failure mode effect analysis procedures to the USGS Outer Continental Shelf oil and gas lease management program
An approach that might be used for determining the applicability of NASA management techniques to benefit almost any type of down-to-earth enterprise is presented. A study was made to determine the following: (1) the practicality of adopting NASA contractual quality management techniques to the U.S. Geological Survey Outer Continental Shelf lease management function; (2) the applicability of failure mode effects analysis to the drilling, production, and delivery systems in use offshore; (3) the impact on industrial offshore operations and onshore management operations required to apply recommended NASA techniques; and (4) the probable changes required in laws or regulations in order to implement recommendations. Several management activities that have been applied to space programs are identified, and their institution for improved management of offshore and onshore oil and gas operations is recommended.
Dyer, M. K.↗
Pioneer Venus mission plan for atmospheric probes and an orbiter.
The mission concept is described for a spin-stabilized spacecraft being designed to deliver an array of aerodynamic probes over the surface of Venus, and, on a second flight mission, to inject the spacecraft into a Venusian orbit. Large and Small Probes and the instrumented 'Bus' structure will enter the Venusian atmosphere and directly measure its characteristics. An orbiting configuration of the same basic Bus spacecraft will serve as a platform from which to examine the planetary environment, the outer atmosphere and its interaction with the solar wind, as well as surface topography. The orbital mission will extend over a complete revolution of the planet around the sun and around its own axis. Requirements for cost effectiveness and firm adherence within early cost projections are emphatic program guidelines which affect every major element of the mission plan and conceptual design.
Dyer, J. W.↗
Diffusion in thin film couples of platinum-gold.
Explore the source record for details and available documents.
Nowak, W. B.↗
The Improvement of Efficiency in the Numerical Computation of Orbit Trajectories
An analysis, system design, programming, and evaluation of results are described for numerical computation of orbit trajectories. Evaluation of generalized methods, interaction of different formulations for satellite motion, transformation of equations of motion and integrator loads, and development of efficient integrators are also considered.
Dyer, J.↗
The energy dilemma and its impact on air transportation
The dimensions of the energy situation are discussed in relation to air travel. Energy conservation, fuel consumption, and combustion efficiency are examined, as well as the proposal for subsonic aircraft using hydrogen fuel.
Dyer, C. R.↗
Further considerations of spallation effects
Trapped photon and cosmic ray effects on spallation in the UK-5 (hard X ray telescope) central crystal were measured. Both low dose and high dose effects were considered. Decay results are presented in tables.
Dyer, C.↗