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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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Digital servo readout system increases recording accuracy of servo-balance weighing scales. Reliability is also increased due to the reduction of the number of components.
Hydraulic servo system increases accuracy in applying fatigue loading to a specimen under test. An error sensing electronic control loop, coupled to the hydraulic proportional closed loop cyclic force generator, provides an accurately controlled peak force to the specimen.
Effects contributed by tape recorders and by wow and flutter of magnetic tape on accuracy of telemetry system
Deep Space Instrumentation Facility two-way Doppler accuracy limitations - effect of charged particles
Influence of Doppler tracking system oscillator instability on orbit accuracy
Range accuracy of Goddard Range and Range Rate system /GRARR/ evaluated and compared to Sequential Collation of Range systems /SECOR/
Accuracy results for perturbed Lunar Orbiter trajectories and unperturbed Kepler orbits
Accuracy of Airborne Range and Orbit Determination tracking system in early minutes of flight
Tracking and navigational accuracy analysis for deep space network
Minimum variance method for estimating state vector with acceptable accuracy constraints in orbit calculation
Trajectory and navigation accuracy studies related to deep space network
Accuracy and speed comparison of Vinti and Brouwer orbit prediction methods
Gas flow calibration systems noting accuracy degree and factors contributing to errors
Accuracy of central finite difference methods for solving boundary value problems in structural analysis governed by equations with variable coefficients
Conventional guidance-problem parameters and basic parameters applicable to Surveyor in relation to accuracy of lunar landing
Accuracy of scalar electrical conductivity calculations of partially ionized plasma using third Chapman-Enskog approximation method
Shut-off valve at the destination of a transferred fluid, improves the accuracy of measurements determining the quantity of liquid transferred from a storage source to a remote location. By synchronizing this valve with the measuring device /totalizer/, the inaccuracies resulting from unfilled transfer lines can be reduced.
Small portable, high intensity isotopic neutron source combines twelve curium-americium beryllium sources. This high intensity of neutrons, with a flux which slowly decreases at a known rate, provides for increased experimental accuracy.