Interplanetary magnetic field mapping and study of sector evolution
Mapping interplanetary magnetic field by extrapolating satellite measurements, and sector evolution observations
SATELLITE MEASUREMENT↗
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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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An analysis of performance estimation methods for aircraft
Measurements and analytical extrapolation validity in predicting full scale flight performance from model wind tunnel tests
FLIGHT SIMULATION↗
The far-ultraviolet spectra of six stars in Orion.
Aerobee rocket sounding of far UV spectra of six stars in Orion, extrapolating mass ejection from resonance absorption lines
STELLAR MASS EJECTION↗
Simulation of total equilibrium shock layer radiation for three typical entry body shapes.
Total equilibrium shock layer radiation data for Martian entry body shapes at various angles of attack extrapolated to trajectory condition
EARTH-MARS RENDEZVOUS TRAJECTORY↗
Environmental technology - How are we doing/ques/
Environmental technology and extrapolation into future, noting government role
DATA RETRIEVAL↗
Behavior of Gemini spacecraft antennas in an ionized medium.
Gemini spacecraft antennas performance during reentry into ionized medium, discussing electron concentration profiles, nonearth atmosphere extrapolation and antenna breakdown effect
ATMOSPHERIC ENTRY↗
Simulation and scaling of low-gravity slosh frequencies and damping.
Low gravity slosh simulation parameters and scaling law used to extrapolate data to full scale spacecraft systems
SPACECRAFT STRUCTURE↗
Study reveals effect of aluminum on saturation moment of Fe-Ni alloys
Study of saturation magnetization, important in the investigation of the electronic structure of alloys, reveals the effect of aluminum on the saturation moments of iron-nickel alloys. The saturation magnetizations were extrapolated to the absolute zero of temperature for calculating average atomic moments.
Aldred, A. T.↗
Failure rates for accelerated acceptance testing of silicon transistors
Extrapolation tables for the control of silicon transistor product reliability have been compiled. The tables are based on a version of the Arrhenius statistical relation and are intended to be used for low- and medium-power silicon transistors.
Toye, C. R.↗
A theory of linear estimation
Theory of linear estimation and applicability to problems of smoothing, filtering, extrapolation, and nonlinear estimation
Lewis, T. O.↗
New value for the solar constant of radiation.
Solar radiation constant reevaluated from aircraft instrument observations and ground extrapolations, noting role in spacecraft design
Drummond, A. J.↗
Calibration of a resistance thermometer down to 0.04 degrees K
Method for calibrating germanium-resistance thermometers in cryostats between 0.4 degrees K and 4 degrees K involves extrapolating the specific heat of a simple metal to low temperatures. This method is used when a magnetic thermometer is not available.
Culbert, H. V.↗
Investigation of the optical properties of silicon solar cell component materials
Normal incidence reflectance data and optical constants of silicon and germanium extrapolated to maximum and minimum limits
Vedam, K.↗
Evaluation of experimental and analytical data for orbital refueling systems.
Excessive extrapolation limitations in applying transient data to low gravity fluid behavior for orbital refueling systems, presenting orbital fluid transfer experiment
Wood, C. C.↗
Single-phase heat transfer improved by helical inserts in tubes
Helical-vane insert creates a single, well defined helical flow passage resulting in more reliable predictions and extrapolations of the thermal and hydraulic performance. Insert core houses instrumentation which does not disturb the flow.
Gutsein, M. U.↗
Derivation of a general perturbation solution - Its application to determination of orbit
Analytical solution to three-body problems is applied to the problem of predicting the orbit of a lunar satellite and determining the orbit of a near-earth satellite. Using this solution, the state vector may be generated at any time without intermediate numerical extrapolation.
Born, G. H.↗
Spectral irradiance measurements of large solar simulators
Statistical extrapolation of spectral irradiance measurements of large solar simulators
Redman, R. S.↗
Research, Development and Fabrication of Lithium Solar Cells
This report continues studies on cells made with low temperature (<400degC) single-cycle, lithium diffusion schedules. Measurements of concentration of lithium at the back surface showed that C(sub S) changes with time consisting of a build-up to a maximum value (above 10(exp 17) cm(exp -3)) with gradual decrease at longer diffusion times. Using the estimated C(sub S) values, theoretical lithium profiles were calculated. The calculated concentration near the PN junction was higher than those measured by the capacitance voltage (C-V) technique. The calculated concentration gradients were one-seventh of those measured by C-V methods. Both the concentration and its gradient were proportional to C(sub S). Estimates of C(sub S) obtained by extrapolating from C-V measured values of concentration and gradient near the PN junction, showed a decrease in C(sub S) for longer diffusion times. This fact supported the trend observed in Shipment C-13, where,, at longer times, the spread in values of V(sub oc), lithium concentration, and gradient became greater. The general conclusion was that the I-V characteristics were well controlled, with good cell output, but for longer diffusion times the lithium concentration gradient could have wider spread. The work described has led to greater insight into the lithium distribution dependence on the surface conditions. The surface conditions could be changed by varying the method used to apply lithium. Vacuum evaporation of lithium shows promise, and another exhaustive test of this method is in progress. Shipment C-13 is summarized, and the succeeding lots (C-14, C-15) are described. It is felt that improved monitoring of cell properties is at hand, and that the control of cell fabrication processes has advanced to where the effects of subtle differences in lithium distribution can now be seen. Evaluation is continuing on the best method to scale up the fabrication steps. A different sequence of fabrication is planned for Shipments C-14 and C-15.
Iles, Peter A.↗