Characterization of the angular response of a multi-directional spectroradiometer for measuring spectral radiance

Abstract. A bi-lateral intercomparison of erythemal broadband radiometers was performed between seven UV calibration facilities. The owners calibrations were compared relative to the characterisation and calibration performed at PMOD/WRC in Davos, Switzerland. The calibration consisted in the determination of the spectral and angular response of the radiometer, followed by an absolute calibration performed outdoors relative to a spectroradiometer which provided the absolute reference. The characterization of the detectors in the respective laboratories are in good agreement: The determination of the angular responses have deviations below ±4% and the spectral responses agree within ±20%. A "blind" intercomparison of the erythemally weighted irradiances derived by the respective institutes and PMOD/WRC showed consistent measurements to within ±2% for the majority of institutes. One institute showed slightly larger deviation of 10%. The differences found between the different instrument calibrations are all within the combined uncertainty of the calibration.

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Intercomparison of erythemal broadband radiometers calibrated by seven UV calibration facilities in Europe and the USA

Atmospheric Chemistry and Physics ◽

10.5194/acp-8-4865-2008 ◽

2008 ◽

Vol 8 (16) ◽

pp. 4865-4875 ◽

Cited By ~ 11

Author(s):

G. Hülsen ◽

J. Gröbner ◽

A. Bais ◽

M. Blumthaler ◽

P. Disterhoft ◽

...

Keyword(s):

Absolute Calibration ◽

Angular Response ◽

The Usa ◽

Combined Uncertainty ◽

The Absolute ◽

Spectral Responses ◽

Good Agreement

Abstract. A bi-lateral intercomparison of erythemal broadband radiometers was performed between seven UV calibration facilities. The calibrations provided by the instruments owners were compared relative to the characterisation and calibration performed at PMOD/WRC in Davos, Switzerland. The calibration consisted in the determination of the spectral and angular response of the radiometer, followed by an absolute calibration performed outdoors relative to a spectroradiometer which provided the absolute reference. The characterization of the detectors in the respective laboratories are in good agreement: The determinations of the angular responses have deviations below ±4% and the spectral responses agree within ±20%. A "blind" intercomparison of the erythemally weighted irradiances derived by the respective institutes and PMOD/WRC showed consistent measurements to within ±2% for the majority of institutes. One institute showed slightly larger deviation of 10%. The differences found between the different instrument calibrations are all within the combined uncertainty of the calibration.

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Design and characterization of a large aperture spectral radiance source integrating sphere for calibration of satellite remote sensors

10.1117/12.2069881 ◽

2014 ◽

Author(s):

Houping Wu ◽

Yingwei He ◽

Chundi Zheng ◽

Guojin Feng ◽

Chi Chen ◽

...

Keyword(s):

Spectral Radiance ◽

Integrating Sphere ◽

Remote Sensors ◽

Large Aperture

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Iridescent Techniques in Ceramics: Physico-Chemical Analysis and Colorimetric Characterization of the Headquarters of the Botín Foundation in Santander

Applied Sciences ◽

10.3390/app9081521 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1521 ◽

Cited By ~ 1

Author(s):

Víctor Echarri-Iribarren ◽

Ángel González-Avilés ◽

Valentín Viqueira-Pérez

Keyword(s):

Chemical Properties ◽

Deposition Process ◽

Spectral Radiance ◽

Natural Light ◽

Building Envelopes ◽

Research And Innovation ◽

Physico Chemical ◽

Spherical Caps ◽

Colorimetric Characterization

In recent years, the use of porcelain stoneware in building envelopes has opened new lines of research and innovation favoring energy efficiency and the reduction of environmental impacts. However, there has been little research on its relationship with light vibration and reflectivity, visual perception, and integration in the urban environment and landscape. In this study, an analysis was conducted on the production and application of crafted pieces of porcelain stoneware, shaped in spherical caps, at the headquarters of the Botín Foundation in Santander (Spain). Various enamels with an iridescent-nacreous finish and metallic reflection were applied to the stoneware to generate a vibrant skin that would constantly change with natural light and the environment. A vitrification and metal deposition process were designed through successive applications of enamels and firings. The physico-chemical properties of the enameling and the microcracking factors that produced the iridescent effect were characterized. A colorimetric characterization was performed evaluating the goniochromatic or iridescent colors, measuring the spectral radiance factor of the light, and comparing these results with other ceramic pieces.

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Morphological Characterization of Mycobacteriophage R1

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100051281 ◽

1974 ◽

Vol 32 ◽

pp. 254-255

Author(s):

B. L. Soloff ◽

T. A. Rado

Keyword(s):

Carbon Source ◽

Stationary Phase ◽

Growth Phase ◽

Minimal Medium ◽

Morphological Characterization ◽

Logarithmic Growth Phase ◽

Complete Lysis ◽

Lysogenic Culture ◽

Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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