| Generation of Dense Fogs for Infrared Multiple Scattering Applications. |
FEB 1979 |
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| Authors:
W. Cheng; J. Ebersole; M. Camac; M. Martinez-Sanchez; S. Kallelis; AERODYNE RESEARCH INC BEDFORD MASS
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 | A continuous flow fog chamber was built with the fog generated by a commercially available spray nozzle. The droplet size spectrum produced resembles that natural fog and is 10 to 100 times denser. An optical depth of 3 to 5m was obtained with the present setup, and it is feasible to decrease the optical depth (i.e., increase the fog particle density) by an order of magnitude by using multiple spray ... |
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| Initiation Phenomena in Pulsed Chemical Lasers. |
OCT 1978 |
99 pages |
| Authors:
James P. Moran; R. Bruce Doak; AERODYNE RESEARCH INC BEDFORD MASS
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 | It has been proposed that trace addition of ClF3 to conventional gas mixtures in photo-initiated HF/DF pulsed lasers might substantially improve chain reaction initiation and consequently, system electrical efficiency. It has further been proposed that steady flow of a spatially tailored trace addition of ClF3 might improve uniformity of initiation and, hence, cavity homogeneity in reptitively pulsed devices by providing enhanced initiation (F-atom production) in regions of diminished lamp illumination. ... |
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| A User's Guide to MIDTRAN - A Combination of LOWTRAN and HITRAN Technologies. |
JUN 1978 |
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| Authors:
D. Robertson; R. Specht; AERODYNE RESEARCH INC BEDFORD MASS
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| This report describes how to use the MIDTRAN computer code for calculation of atmospheric transmission and radiation in the 2-5 micrometers spectral region. The code contains the flexibility of the LOWTRAN code and the high resolution technology of the HITRAN compilation of spectral lines to yield a flexible code with a spectral resolution of approximately 0.1/cm 1. The code can be used for a variety of paths (horizontal, vertical, slant, ... |
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| Analysis of Electron Retarding Potential Analyzer Measurements of Vehicle Skin Potential in the Precede Experiment. |
JAN 1978 |
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| Authors:
Fritz Bien; AERODYNE RESEARCH INC BEDFORD MASS
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| A 2 kW electron accelerator was launched as the initial launch in the EXCEDE series of artificial auroral experiments. The launch, designated PRECEDE, was supported by a number of ground based optical systems to record the electron induced atmospheric emissions as a remote diagnostic technique of accelerator performance in addition to recording emissions of aeronomic interest in a controlled artificial aurora. The electron source, square wave modulated at 0.5 Hz, ... |
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| Measurements of Nitric Oxide Ion Vibrational Absorption Coefficient and Vibrational Transfer to N2, |
SEP 1977 |
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| Authors:
Fritz Bien; AERODYNE RESEARCH INC BEDFORD MASS
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| The line locations absorption coefficient and quenching of NO(+) vibration in the v = 1 and v = 2 by N2 have been experimentally determined. Integrated absorption coefficients corrected for a thermal equilibrium distribution are: S sub lu(1 - 2 P15) = 420/sq.cm./atm at 2291.63/cm and S sub lu(2 - 3 R2) = 653/sq.cm./atm at 2286.72/cm. Quenching of NO(+)(v) by N2 at 297 K was found to give rates of ... |
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| A CW HF Laser with Supersonic Premixing and Stationary Shock Initiation. |
APR 1977 |
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| Authors:
James P. Moran; Charles E. Kolb; AERODYNE RESEARCH INC BEDFORD MASS
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| Formation of HF by the chain reaction is initiated by the simultaneous reaction NO + F2 yields NOF + F. A detonable mixture of the reactants, H2, F2, and NO in argon or helium diluent, is achieved by secondary injection of H2 and NO along the trailing edges of a two-dimensional nozzle array into a cold supersonic stream of premixed F2 plus diluent. Mixing of the secondary injectants is achieved ... |
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| Measurements of the Infrared Optical Characteristics of Fog. |
JAN 1977 |
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| Authors:
James P. Moran; AERODYNE RESEARCH INC BEDFORD MASS
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| The current contract is directed to the achievement of fog generation on a laboratory scale. The objective is the production and measurement of fog which has a realistic droplet size distribution and which is of sufficient density to provide an optical depth at 3.8 micrometers of at least 10 cm. Steady state operation will be achieved in a continuously flowing system with a spatially uniform experimental volume of one cubic ... |
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| MRDA - A Medium Resolution Data Analysis Code for the HP 2100 Computer. |
JAN 1977 |
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| Authors:
D. Kryger; D. Robertson; AERODYNE RESEARCH INC BEDFORD MASS
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| This report describes the Medium Resolution Data Analysis Code (MRDA) which is a computer software code developed to run on the HP2100 mini-computer at the Air Force Geophysics Laboratory. The code calculates the atmosphere transmittance of radiation in the 1800-6000/cm range. The code can be used for a variety of paths(horizontal, vertical, downward, to space, etc). The user has the option of using either the 1962 U.S. Standard Model atmosphere ... |
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| MEASUREMENTS OF THE INFRARED PROPERTIES OF AEROSOLS, IN: NASA-CP-2004 PTUA9-1/TUA9-4 |
13 DEC 1976 |
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| Authors:
J.F. EBERSOLE; AERODYNE RESEARCH INC BEDFORD MASS
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| Growth of Carbon Particles in Rocket Exhaust. |
NOV 1976 |
36 pages |
| Authors:
David M. Mann; AERODYNE RESEARCH INC BEDFORD MASS
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| The specific approach taken in this work was to study particle formation in a cooling jet of carbon vapor diluted by an inert carrier gas. Vapor was produced by the evaporation of a resistance heated graphite tube. The carbon vapor, mixed with carrier gas, flowed into a light scattering chamber where spectroscopic measurements were used to monitor concentrations of molecular species. Particles were also collected for electron microscopy. An initial ... |
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| Plume Attenuated Radar Cross Section Code: User's Manual. |
JUN 1976 |
78 pages |
| Authors:
J. Rickman; K. Tait; D. Mann; AERODYNE RESEARCH INC BEDFORD MASS
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| The PARCS CODE calculates the coherent, incoherent, and overdense surface radar cross sections of a rocket plume. The modified Born approximation calculation includes attenuation, local index of refraction, Doppler shift and range cell truncation. The program accepts plume data directly from the AeroChem LAPP code, but may be interfaced with other sources of plume definition. (Author) |
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| Aerosol Attenuation in the 2-4 Micrometers Region. |
MAR 1976 |
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| Authors:
Robert C. Sepucha; David M. Mann; AERODYNE RESEARCH INC BEDFORD MASS
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| This report describes an experimental facility constructed to measure the extinction and scattering of DF laser radiation by atmospheric aerosols. The details of the apparatus, the theory of the measurements, and calibration results are presented. (Author) |
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| Experimental Measurement of NO(+) Radiative Lifetime. |
NOV 1975 |
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| Authors:
Fritz Bien; AERODYNE RESEARCH INC BEDFORD MASS
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| The location and integrated absorption coefficient of the R-3 line for the v = 1 to v = 2 vibrational transition in NO(+) has been experimentally measured. The location of the line center was determined to be 2327.20 + or - 0.01/cm, 0.07/cm higher than the previosly calculated value. The line was found to be Doppler broadened, giving an integrated absorption coefficient of 240 + or - (+100, -75)/sq cm ... |
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| Growth of Carbon Particles. |
OCT 1975 |
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| Authors:
David M. Mann; AERODYNE RESEARCH INC BEDFORD MASS
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| The specific approach taken in this work was to study particle formation in a cooling jet of carbon vapor diluted by an inert, carrier gas. Vapor was produced by the evaporation of a resistance heated graphite tube. The carbon vapor, mixed with carrier gas, flowed into a light scattering chamber where spectroscopic measurements were used to monitor concentrations of molecular species. Particles were also collected for electron microscopy. An initial ... |
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