skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: BOLIDE DYNAMICS AND LUMINOSITY MODELING: COMPARISONS BETWEEN UNIFORM BULK DENSITY AND POROUS METEOROID MODELS

Abstract

No abstract prepared.

Authors:
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
788222
Report Number(s):
LA-UR-01-5647
TRN: US200202%%287
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Oct 2001
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; METEORITES; BULK DENSITY; DYNAMICS; LUMINOSITY; METEOROIDS; MATHEMATICAL MODELS; POROUS MATERIALS

Citation Formats

D. O. REVELLE. BOLIDE DYNAMICS AND LUMINOSITY MODELING: COMPARISONS BETWEEN UNIFORM BULK DENSITY AND POROUS METEOROID MODELS. United States: N. p., 2001. Web.
D. O. REVELLE. BOLIDE DYNAMICS AND LUMINOSITY MODELING: COMPARISONS BETWEEN UNIFORM BULK DENSITY AND POROUS METEOROID MODELS. United States.
D. O. REVELLE. Mon . "BOLIDE DYNAMICS AND LUMINOSITY MODELING: COMPARISONS BETWEEN UNIFORM BULK DENSITY AND POROUS METEOROID MODELS". United States. doi:. https://www.osti.gov/servlets/purl/788222.
@article{osti_788222,
title = {BOLIDE DYNAMICS AND LUMINOSITY MODELING: COMPARISONS BETWEEN UNIFORM BULK DENSITY AND POROUS METEOROID MODELS},
author = {D. O. REVELLE},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Oct 01 00:00:00 EDT 2001},
month = {Mon Oct 01 00:00:00 EDT 2001}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • We compare predictions of bolide behavior using basic meteoroid models, first assuming a uniform bulk density throughout the body and secondly assuming a uniform chondritic composition throughout, but with varying amounts of porosity (assumed to be filled with either water-ice or open space). The second model is based one the uniformity of spectral observations over many years from shower meteors from the extremes of the Geminids to the dustball-like Draconids. The first model utilized is due to ReVelle (1979, 1993) and the second is based upon the porous meteoroid model of ReVelle (1983, 1993). The standard, uniform bulk density modelmore » assumes that the drag and heat transfer area are equivalent in the positive, shape change factor limit. For porous meteoroids however, the heat transfer area can exceed the drag area by increasingly larger amounts as the body's porosity increases. ReVelle (1983) used this approach to show that the bulk density and ablation parameter compositional group identifications of Ceplecha and McCrosky (1976) were essentially correct. When these factors are introduced into the relevant model equations, a set of nearly self-consistent predictive relations are developed which readily allows comparisons to be made of the end-height variations and of the normalized luminous output of the two basic meteoroid models.« less
  • Solar radiation models which can be used to predict global radiation from cloud cover data, and direct normal radiation from measurements of global have been developed for Blytheville, Arkansas. These models are compared to the current NOAA models used in the SOLMET weather tapes. The accuracies of the NOAA cloud cover model and the Randall and Whitson direct normal model are compared to recorded solar data in both Blytheville and Houston, TX. The results indicate good accuracy for the models in terms of yearly predictions, but the Randall and Whitson direct normal model, particularly, is subject to very large (+-20%)more » variations from month to month.« less
  • In this paper we apply the theoretical entry model of ReVelle (2001c) to the large Leonid bolide of November 17, 1998. We modeled the entry both using hypersonic aerodynamics and compared the results to the infrasonic detection and interpretation of the event by ReVelle and Whitaker (1999).