| Retrieval of Tropospheric Profiles from IR Emission Spectra: Field Experiment and Sensitivity Study |
30 JUN 1993 |
28 pages |
| Authors:
J. M. Theriault; G. P. Anderson; J. H. Chetwynd; E. Murphy; V. Tuner; PHILLIPS LAB HANSCOM AFB MA
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 | This presentation includes technical comparisons of different atmospheric modeling instruments. For this report, results of the DBIS (Double Input Beam Interferometer Sounder) were compared to models such as FASCOD3 and MODTRAN2/L. The goal of this project was the retrieval of atmospheric temperature and water vapor profiles and possibly over relevant information on clouds and aerosol properties from high resolution IR emission measurements with a ... |
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| Users Guide to LOWTRAN 7 |
16 AUG 88 |
146 pages |
| Authors:
F. X. Kneizys; E. P. Shettle; L. W. Abreu; J. H Chetwynd; G. P. Anderson; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| LOWTRAN 7 is a low-resolution propagation model and computer code for predicting atmospheric transmittance and background radiance from 0 to 50,000 cm -1 at a resolution of 20 cm -1. The code is based on the LOWTRAN 6 (1983) model. Multiple scattered radiation has been added to the model as well as new molecular band model parameters and new ozone and molecular oxygen absorption parameters for the UV. Other modifications ... |
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| AFGL Atmospheric Constituent Profiles (0.120km) |
15 MAY 86 |
46 pages |
| Authors:
G. P. Anderson; S. A. Clough; F. X. Kneizys; J. H. Chetwynd; E. P. Shettle; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| An atmospheric data base consisting of volume mixing ratios (o0 to 12okm) for twenty eight (28) minor and trace gases has been assembled for use with spectral radiance transmittance models. Six references atmospheres, each defining temperature, pressure and density as a function of altitude (selected from the U.S. Standard Supplements, 1966 and the U.S. Standard Atmosphere, 1976) provide a range of climatological choices. Analogous zonal-mean descriptions for 2O, O3, N2O, ... |
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| Methods for Energy Release Rate Calculation, |
NOV 1984 |
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| Authors:
G. P. Anderson; L. P. Abrahamson; MORTON THIOKOL INC BRIGHAM CITY UT WASATCH DIV
|
 | This paper compares four methods for obtaining fracture mechanics parameters from finite element computer programs. Total energy release rate values are obtained using numerical differentiation, crack closure integral, modified crack closure integral, and crack opening displacements. A commonly used method, numerical differentiation of strain energy, does not yield the correct energy release rate when displacement and traction loads are applied simultaneously. The authors found that the relatively new crack closure ... |
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| Stratospheric Determination of Effective Photodissociation Cross Sections for Molecular Oxygen: 191-204 nm |
20 OCT 1983 |
22 pages |
| Authors:
G. P. Anderson; L. A. Hall; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
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| Balloon-borne spectrometer measurements of solar ultraviolet irradiance have been used to provide direct estimates of effective photodissociation cross-sections (sigma sub i to the e power i = 10Ta lambda interval) for molecular oxygen appropriate for altitudes between 30 and 40 km. The calculations from which can be determined are based on an internally consistent, two-part analysis of ascent spectra. The fine resolution 02 absorption cross section derived from the fractional ... |
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| Adhesive Fracture Mechanics, |
19 JUN 1977 |
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| Authors:
M. L. Williams ; G. P. Anderson
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| The similarity from the mechanics viewpoint in treating either cohesive or adhesive fracture is reviewed, as well as highlighting certain difficulties in the latter category. Some recent results are reported for adhesive debonding between the fiber and the matrix in a composite material. (Author). |
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| the peel test in experimental adhesive-fracture mechanics |
JAN 76 |
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| Authors:
G. P. Anderson; K. L. Devries; M. L. Williams
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| several test specimens have been proposed for obtaining adhesive- fracture energy, gamma sub a, in bond systems. these tests include blister, cone, lap-shear and peel tests. peel tests have been used for many years to compare relative strengths of different adhesives, different surface-preparation techniques, etc. this paper demonstrates the potential use of peel tests in obtaining gamma sub a values. there are several reasons for developing the peel test for ... |
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