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Results for “ROUGHNESS”

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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At least 451 records · Page 25

All sources NASA NTRS DOE OSTI

NASA NTRS1966

Lunar surface roughness shadowing and thermal emission

Statistical model of lunar surface roughness for shadow and infrared emission characteristics

SURFACE ROUGHNESS↗

NASA NTRS1967

Scattering from surfaces with different roughness scales, analysis and interpretation

Statistical analysis and physical interpretation of scattering from surfaces with different roughness scales

ELECTROMAGNETIC SCATTERING↗

NASA NTRS1967

Some effects of roughness and variable entropy on transition at a Mach number of 8.

Tests at Mach 8 on cone, analyzing effect of roughness elements and variable entropy on transition and heat transfer distribution

HEAT TRANSFER↗

NASA NTRS1967

Omnidirectional scattering of acoustic waves by rough, imperfectly reflecting surfaces.

Acoustic waves omnidirectional scattering by rough imperfectly reflecting surfaces analyzed using physical optics method

REFLECTED WAVE↗

NASA NTRS1967

Bidirectional reflectance of rough metal surfaces.

Rough metal surface bidirectional reflectance, using Davies and Beckmann models

MATHEMATICAL MODEL↗

NASA NTRS1967

Lunar surface roughness - Shadowing and thermal emission.

Model for lunar surface roughness effect on emission of thermal IR radiation and casting of shadows in sunlight

THERMAL EMISSION↗

NASA NTRS1967

Geometrical shadowing of a random rough surface.

Geometrical self-shadowing of random rough surface described by Gaussian statistics in wave backscattering phenomena

GAUSS FUNCTION↗

NASA NTRS1967

Field theory of depolarization of radar backscatter with application to a distant, slightly rough sphere.

Vector field theory of time dependent backscatter from distant slightly rough sphere for pulsed and sinusoidally steady state sources

RADAR SCATTERING↗

NASA NTRS1999

Relating Vegetation Aerodynamic Roughness Length to Interferometric SAR Measurements

In this paper, we investigate the feasibility of estimating aerodynamic roughness parameter from interferometric SAR (INSAR) measurements.

aerodynamic↗

NASA NTRS1994

Measurement of Aerodynamic Roughness Using Radar Backscatter Over Vegetated Surfaces

This paper describes a potential mechanism for remotely inferring the wind regime by using synthetic-aperture radar data to describe the roughness of the surface, and describes a project to estimate the practicality of such a mechanism.

wind↗

NASA NTRSDate not supplied

ESM Roughness Datasets (ARC)

This work focused on the effects on turbulent heat transfer due to surface roughness of types relevant to NASA entry missions, and was supported by NASA’s Entry Systems Modeling (ESM) Project. The emphasis was on new classes of woven materials, which are enabling for many missions.

heat transfer↗

NASA NTRS1962