An empirical method for estimating unmanned spacecraft program costs.
Unmanned spacecraft program costs estimation through empirical studies of past and current NASA programs
SPACE PROGRAM↗
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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 empirical method for estimating unmanned spacecraft program costs.
Unmanned spacecraft program costs estimation through empirical studies of past and current NASA programs
NASA PROGRAM↗
A method of estimating high temperature low cycle fatigue behavior of materials.
Mechanical properties used to estimate low cycle fatigue behavior in creep range of components in high-temperature systems
CREEP ANALYSIS↗
Application of a method of estimating high temperature low cycle fatigue behavior of materials.
High temperature low cycle creep range strain fatigue behavior estimation from tensile and stress rupture properties
STRAIN FATIGUE↗
A proposed method of estimating cloud-top temperature, cloud covers, emissivity, and cloudness from short and long wave radiation data obtained by medium-resolution scanning radiometers
Tiros medium resolution scanning radiometer data from short and long wavelengths used to estimate cloud top temperatures, cloud cover, emissivity, and equivalent black body temperatures
Fujita, T.↗
Application of a method of estimating high- temperature low-cycle fatigue behavior of materials.
Metal alloys high temperature low cycle strain fatigue resistance in creep range estimated from tensile and stress rupture data
Halford, G. R.↗
A method for estimating accelerations of shipping containers mounted on an impacting railroad car
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Scialdone, J. J.↗
A proposed method for estimating residual matrix chemistry in nickel-base superalloys
Estimation of residual matrix composition of nickel-base superalloys by phase diagram analysis
Dreshfield, R. L.↗
A method for estimating as-installed thermal conductivity values, appendix J
Estimating thermal conductivity values from compression of multilayers in tank insulation
Source record↗
Method for estimating the electrical conductivity of the lunar interior
Lunar interior electrical conductivity estimated using lunar interaction with solar wind and interplanetary electric and magnetic fields
Blank, J. L.↗
A two spacecraft test of a single spacecraft method of estimating shock normals
Calculating improved shock normals using least squares technique on combined magnetic field and plasma data from single spacecraft
Lepping, R. P.↗
Single spacecraft method of estimating shock normals
Shock normal calculation by applying least squares technique to combined geomagnetic field and plasma data from single satellite, assuming Rankine-Hugoniot conservation relations
Argentiero, P. D.↗
A method for estimating the components of lift of wing-body combinations at supersonic speeds
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Tucker, W. A.↗
Method for estimating solubility parameter
Semiempirical correlations have been developed between solubility parameters and refractive indices for series of model hydrocarbon compounds and organic polymers. Measurement of intermolecular forces is useful for assessment of material compatibility, glass-transition temperature, and transport properties.
Lawson, D. D.↗
A two-spacecraft test of a single spacecraft method of estimating shock normals
By assuming the validity of a subset of the Rankine-Hugoniot conservation relations for interplanetary (IP) shocks in an isotropic medium it has been demonstrated, in principle, that improved shock normals can be calculated by using a least-squares technique on combined magnetic field and plasma data from a single spacecraft. The scheme uses those six conservation relations not involving pressure and temperature. This paper deals with a test of the scheme by examining in detail a shock across which the magnetic field changed direction by a small amount (approximately 10 deg). On January 26, 1968 at about 1430 UT this shock was observed by the plasma and magnetic field instruments in Explorers 33 and 35. The spacecraft were 76.6 and 56.9 R sub E sunward of the earth, respectively (and 43.5 R sub E from each other), and therefore well outside the earth's bow shock region, a necessary condition for a valid test.
Lepping, R. P.↗
A simple method for estimation of coagulation efficiency in mixed aerosols
Aerosols of KBr and AgNO3 were mixed, exposed to light in a glass tube and collected in the dark. About 15% of the collected material was reduced to silver upon development. Thus, two aerosols of particles that react to form a photo-reducible compound can be used to measure coagulation efficiency.
Dimmick, R. L.↗
A method for estimating proportions
A proportion estimation procedure is presented which requires only on set of ground truth data for determining the error matrix. The error matrix is then used to determine an unbiased estimate. The error matrix is shown to be directly related to the probability of misclassifications, and is more diagonally dominant with the increase in the number of passes used.
Guseman, L. F., Jr.↗
A method for estimating the absolute ages of small Copernican craters and its application to the determination of Copernican meteorite flux
Cosmic ray exposure ages of ejecta from Copernican craters in various stages of erosion can be used to construct a curve from which the time of formation of craters in the Copernican System can be estimated on the basis of their morphology. Use of this curve to estimate the flux for particles that formed 75-1000 m craters during six increments of Copernican time in an area of Mare Serenitatis suggests that the flux has steadily increased throughout Copernican time. These results are considered to be preliminary until more work of this kind has been done for other mare areas of the moon.
Swann, G. A.↗