RESULTS OF MICROMETEORITE PENETRATION EXPERIMENT ON THE EXPLORER VII SATELLITE 1959 10TA
Micrometeorite penetration experiment on explorer vii satellite - 1959 iota
SPACECRAFT ENVIRONMENT↗
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Results for “PENETRATION”
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 INVESTIGATION OF THE EFFECT OF TARGET TEMPERATURE ON PROJECTILE PENETRATION AND CRATERING
Effect of target temperature on projectile penetration and cratering
TARGET PENETRATION↗
The calculation of proton penetration and dose rates
Proton energy degradation and flux attenuation as function of penetration depth of shielding materials
PARTICLE FLUX↗
Jet penetration into a liquid
Stagnation pressure and displaced liquid analysis of gas jet impingement on and penetration into liquid at subsonic and supersonic speeds
IMPINGEMENT↗
The effect of material properties on threshold penetration
Effect of material properties on threshold penetration
PENETRATION↗
Pegasus satellite measurements of meteoroid penetration /February 16 - July 20, 1965/
Pegasus satellite measurements of meteoroid penetration
METEOROID↗
Penetration of thin films by hypervelocity microparticles
Penetration of thin films by hypervelocity impact microparticles
HYPERVELOCITY IMPACT↗
Radiation from positive particles penetrating the auroral atmosphere.
Upper and lower limits to expected alpha and beta hydrogen and helium line emissions due to protons and alpha particles penetrating auroral atmosphere
EMISSION SPECTRUM↗
Penetration of drops into high-velocity airstreams
Penetration of drops determined for cross current injection of isooctane jets into high velocity airstreams
INJECTION↗
Recent NASA meteoroid penetration results from satellites
Meteoroid penetration measurements by Explorer XVI and XXIII satellites and Pegasus satellites for application to spacecraft design
EXPLORER XXIII SATELLITE↗
Deep penetration of radiation by the method of invariant imbedding.
Invariant imbedding method applied to energy dependent neutron radiation penetration problems in thick and heterogeneous shields
PENETRATING PARTICLE↗
The Ariel II micrometeorite penetration measurements.
Penetration rates of thin aluminum foil sensors of Ariel II satellites compared with flux measured by microphone detectors in vicinity of earth
SATELLITE INSTRUMENTATION↗
Active Sample Acquisition System for Micro-Penetrators
This paper summarizes the design and development of a sub-surface sample acquisition system for use in micro-penetrators.
DS-2↗
Reconstruction of Historical Surface Mass Balance, 1984–2017 from GreenTrACS Multi-offset Ground-penetrating Radar
We present continuous estimates of snow and firn density, layer depth and accumulation from a multi-channel, multi-offset, ground-penetrating radar traverse. Our method uses the electromagnetic velocity, estimated from waveform travel-times measured at common-midpoints between sources and receivers. Previously, common-midpoint radar experiments on ice sheets have been limited to point observations. We completed radar velocity analysis in the upper ~2 m to estimate the surface and average snow density of the Greenland Ice Sheet. We parameterized the Herron and Langway (1980) firn density and age model using the radar-derived snow density, radar-derived surface mass balance (2015–2017) and reanalysis-derived temperature data. We applied structure-oriented filtering to the radar image along constant age horizons and increased the depth at which horizons could be reliably interpreted. We reconstructed the historical instantaneous surface mass balance, which we averaged into annual and multidecadal products along a 78 km traverse for the period 1984–2017. We found good agreement between our physically constrained parameterization and a firn core collected from the dry snow accumulation zone, and gained insights into the spatial correlation of surface snow density.
glacier geophysics↗
ANALYTICAL AND LIMITED EXPERIMENTAL STUDY OF THE MECHANISMS OF PENETRATION AND LIGHT EMISSION FOR MICROMETEORITE IMPACT OF AN ALUMINUM-COATED PHOTOMULTIPLIER. QUARTERLY PROGRESS REPORT NO. 3, FOR THE PERIOD APRIL 1, 1961 THROUGH JUNE 30, 1961
Penetration and light emission for micrometeorite impact of an aluminum-coated photomultiplier
PHOTOMULTIPLIER↗
ANALYTICAL AND EXPERIMENTAL STUDY OF THE MECHANISMS OF PENETRATION AND LIGHT EMISSION FOR MICROMETEOROID IMPACT ON AN ALUMINUM-COATED PHOTOMULTIPLIER. QUARTERLY PROGRESS REPORT NO. 7, FOR THE PERIOD APR. 1 THROUGH JUNE 30, 1962
Mechanisms of penetration and light emission for micrometeoroid impact on an aluminum-coated photomultiplier
PROPAGATION↗
Improved sensor counts micrometeoroid penetrations
A sensor, consisting of a thin dual-capacitor assembly with an outer film of thermal-control material, is used to detect micrometeoroid particles. A coincidence counting circuit is used to count the penetrations.
Davison, E. H.↗
DYNAMIC PENETRATION STUDIES IN CRUSHED ROCK UNDER ATMOSPHERIC AND VACUUM CONDITIONS
Discussion of experimental apparatus and results of a dynamic penetration study of crushed rock under atmospheric and vacuum conditions /see accession no. a-63 12763, issue no. 7/
LUNAR GEOLOGY↗