Two Instruments for Atmospheric Optics Measurements*

Pritchard, Benjamin S.; Elliott, W. G.

doi:10.1364/josa.50.000191

Cited by 78 publications

(24 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratios of forward-to-backvward scaLtering were geneirally found tn increase with wavelength in agreement with the findings of others.-, 4 ) 6 As was ..g..ctcd by Gibbons,3 a possible e -lanation of the nature of this wavelength dependency is that with increasing wavelength the relative contribution of molecular and small particle scattering to total atmospheric scattering decreases rapidly.…”

Section: Atmospheric Angular Scattering Diagramssupporting

confidence: 87%

See 1 more Smart Citation

Transmission and Scattering Properties of the Los Angeles, California Atmosphere in August and September 1960

Schleiger¹,

Nichols²,

Laughridge³

1961

View full text Add to dashboard Cite

Program, as Progra-m A 2, Pronlern 7.j -U C ill. Descrin-tion of Work( Durine! FY 1.159 :c-,uipmecnr was desi ;ncd, fab-ricated, and uised a determinle the raLm ation atenua~irse propertie s of clear atrro~hcres at cisc Nevada Tes-t Site. In BY 100C the -qui-mient was modified aad measuremc.,tz ode in atusospiirrs with overcast cl'oud conditions at the same :.oeatioi. In IY 961 aire-furtheir equipment nmodificction .rr~easnrrl:"teSr 'were zaeill the Sullmer atm.osnhercit of Lo Anacles ,0 Jaiornia. The measurements wzere made at wavelengths .. 40,, 0.5a, -0.77 and 0.88p (microns) with receiver fields of view up to 64"degrees half-angle. From these data attenuation coefficients were calculated for collimated transmission and aureoled transmission (km source and flat receiver facing the source).-Also calculated for aureoled transmission were values of R, the ratio of "scatteredin" radiation to direct radiation received -y the f lat rcie at various distances from the source. Angular scattering diagrams and attenuation coefficients for scattering were measured for radiation of wavelengths 0.40, 0.451 0.50 and 0.55%1. Relations between these optical characteristics of the atmosphere and meteoro'logical.characteristics such as visibility, relative humidity,, and contaminant contents were examined. Investigations of transmission variabilitywith respect to both time end space were made. Curves wer6 prepared from these and other experimental, data showing transmittances 'of four typical atmospheres as a function of range for the case of flat receivers and radiation from a 4n black body source at 6000 degrees K. 0The Problem:The amount of thermal tadiation delivered to a g ven receiverfrom the fireball of a nuclear explosion depends on the transmittance of the atmosphere as a function of wavelength, the spectral 4istri-.. * butio4 of the radiation, thq receiver field of view, the range, the albedo of the terrain, and the amount and height above the ground of clouds piesentMTh6 purpose of thit experiment was to'determine the. range of transmittance values of the Los Angles nighttime atmoshiI ie during the:months of Aughst and September 1960.-The Findings: 0 A Xenon flaslilamp 4r source and mobile photomultiplier receivers * w th adjustable fields of view and filters are used to determine atteuation coefficients for colllmaed transmisaion and aureoled A * transmission (4U-source and flat receiver and for calculating P,, the ratio of "scaPttered-in" to direct irradlance, at source-r ceiver dis-00 o .tanees ranging from 0.90 to 6 -,77 statute miles.

show abstract

Section: Atmospheric Angular Scattering Diagramssupporting

confidence: 87%

“…In the case of the two longer wavelength combinations the effect of the shift would be to narrow the band width somewhat without affecting the location of the peaks. The Pritchard polar nephelometer described earlier ' 14 6 ' was again used to determine angular scattering characteristics of the Los Angeles atmosphere.…”

mentioning

confidence: 99%

Transmission and Scattering Properties of the Los Angeles, California Atmosphere in August and September 1960

Schleiger¹,

Nichols²,

Laughridge³

1961

View full text Add to dashboard Cite

show abstract

“…The earliest known work was carried out by Pritchard and Elliott (1960). They designed a polar nephelometer to measure six elements of the Mueller matrix for fog and clear air.…”

Section: Literature Surveymentioning

confidence: 99%

Radiative properties of char, fly-ash, and soot particles in coal flames. Technical progress report, second year, October 1994--December 1994

Menguec¹,

Manickavasagam²,

Govindan³

et al. 1995

View full text Add to dashboard Cite

“…Incident righthand circularly polarized light, when scattered, may contain some left-hand circularly polarized light that can be detected by using a "crossed" analyzer. Pritchard and Elliott (1960) made some initial studies of pola.rization in the atmosphere using a conventional light source. Their results indicated, as do ours, that an initial diagonal polarization can be represented by the sum of equal components of parallel and perpendicular polarizations and the scattering of each component treated independently.…”

Section: Particle Characteristics From Light Scattering Measurementsmentioning

confidence: 99%

Particle characteristics from light scattering measurements<sup>1</sup>

Harris

1969

Tellus A: Dynamic Meteorology and Oceanography

View full text Add to dashboard Cite

Two Instruments for Atmospheric Optics Measurements*

Cited by 78 publications

References 7 publications

Transmission and Scattering Properties of the Los Angeles, California Atmosphere in August and September 1960

Transmission and Scattering Properties of the Los Angeles, California Atmosphere in August and September 1960

Radiative properties of char, fly-ash, and soot particles in coal flames. Technical progress report, second year, October 1994--December 1994

Particle characteristics from light scattering measurements<sup>1</sup>

Contact Info

Product

Resources

About