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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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Simultaneous integration of n-bodies by analytic continuation with recursively formed derivatives.
Motion equations of sun, moon, earth and lunar probe integrated by power series solution and analytic continuation with recursively formed derivatives
On the particle size distribution of lunar soil.
Lunar soil particle size distribution from earth based and lunar probes indicating mean size between 10 and 100 microns
Gravitational inconsistency in the lunar theory - Confirmation by radio tracking.
Residuals in lunar ephemeris calculated from Brown theory confirmed by lunar probes radio tracking and reduced by repeated calculations, using LE 5
Lunar surface mechanical properties at the landing site of Surveyor 3.
Mechanical properties of lunar surface material analyzed from engineering and TV data from Surveyor 3 lunar probe
Chemical analysis of the moon at the Surveyor 7 landing site - Preliminary results.
Preliminary results of chemical analysis of moon at Surveyor 7 landing site
Atlas-Centaur AC-12 flight performance for Surveyor 3
Flight performance evaluation of Atlas Centaur launch vehicle AC-12 carrying Surveyor 3 lunar probe
The Ranger 9 flight path and its determination from tracking data
Estimate of Ranger 9 lunar probe flight path and method used for analyzing tracking data
Lunar station television camera
Panoramic television cameras aboard Lunik lunar probes
Surveyor 1 mission report. Part 2 - Scientific data and results
Lunar data and results of Surveyor 1 lunar probe
Surveyor Spacecraft System - Surveyor 7 Flight Performance Final Report
Performance analyses of Surveyor 7 lunar probe including launch, orbit, descent, photography, alpha scattering measurements, and soil sampling
Differences between proposed Apollo sites. I - Synthesis.
Spectral reflectivity and emissivity observations of proposed Apollo landing sites compared with other lunar localities and unmanned lunar probe data
The Surveyor experimental test laboratory Technical memorandum
Lunar probe simulation in Surveyor experimental test laboratory
The alpha-scattering technique of chemical analysis
Surveyor lunar probes alpha scattering chemical analysis technique tested on rocks of known composition
Introduction to passive nutation dampers
Coning motion can prevent photographic and TV cameras and other oriented spacecraft experiments from maintaining a steady scan, and it can introduce a ripple in the high-gain communication system. Nutation dampers are used to remove this type of spacecraft instability. The first nutation damper flown in a missile for the stabilization of the gyroscope consisted of a hollow ring that was partially filled with mercury, and the sloshing of the mercury dissipated the nutational energy. A similar mercury-ring damper was used in the Pioneer 1 lunar probe in 1958 and became the first nutation damper to be used in space. Since then many types of nutation dampers have been designed for spin-stabilized spacecraft ranging in size from small scientific satellites to large space stations.
Project Mercury: Man-In-Space Program of the National Aeronautics and Space Administration
The purpose of this staff study, made at the request of the chairman, is to serve members of the Committee on Aeronautical and Space Sciences as a source of basic information on Project Mercury, the man-in-space program of the National Aeronautics and Space Administration. The study is largely derived from unclassified information released by the National Aeronautics and Space Administration and testimony concerning Project Mercury given during hearings before this committee. The program descriptions are based upon current program planning. Since this is a highly advanced research and development program, the project is obviously subject to changes that may result from future developments and accomplishments characteristic of such research activities. Certain information with respect to revised schedules, obtained on a classified basis by the committee during inspection trips, is necessarily omitted. The appendixes to the study include information that may prove helpful on various aspects of space flight and exploration. Included are unofficial comments and observations relating to Russia's manned space flight activities and also a complete chronology of all satellites, lunar probes, and space probes up to the present.
Development of Compact, Modular Lunar Heat Flow Probes
Geothermal heat flow measurements are a high priority for the future lunar geophysical network missions recommended by the latest Decadal Survey and previously the International Lunar Network. Because the lander for such a mission will be relatively small, the heat flow instrumentation must be a low-mass and low-power system. The instrument needs to measure both thermal gradient and thermal conductivity of the regolith penetrated. It also needs to be capable of excavating a deep enough hole (approx. 3 m) to avoid the effect of potential long-term changes of the surface thermal environment. The recently developed pneumatic excavation system can largely meet the low-power, low-mass, and the depth requirements. The system utilizes a stem which winds out of a pneumatically driven reel and pushes its conical tip into the regolith. Simultaneously, gas jets, emitted from the cone tip, loosen and blow away the soil. The thermal sensors consist of resistance temperature detectors (RTDs) embedded on the stem and an insitu thermal conductivity probe attached to the cone tip. The thermal conductivity probe consists of a short 'needle' (2.4-mm diam. and 15- to 20-mm length) that contains a platinum RTD wrapped in a coil of heater wire. During a deployment, when the penetrating cone reaches a desired depth, it stops blowing gas, and the stem pushes the needle into the yet-to-be excavated, undisturbed bottom soil. Then, it begins heating and monitors the temperature. Thermal conductivity of the soil can determined from the rate of temperature increase with time. When the measurement is complete, the system resumes excavation until it reaches the next targeted depth.
Integrated Studies of Impact-Basin Ejecta as Probes of the Lunar Crust: Imbrium and Serenitatis
The large, late, basin impacts on the Earth side of the Moon fundamentally reshaped the structure of the crust, its surface morphology, and the composition of the megaregolith and surface soils. The latest (except for Orientale on the western limb) and largest was the Imbrium impact, which produced massive ejecta deposits over much of the Procellarum region and beyond, and ejected material that mixed with surface regolith nearly Moonwide. The basins serve as natural probes into the lunar crust; therefore, understanding the nature and composition of ejecta produced by them provides information about the crust at depth. Gravity data allow modeling of the structure of the crust beneath the basins, and from such models one can infer depths of excavation and the nature of crustal response following impact.