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Ultrasound-assisted extraction optimization of Fructus Tribuli polysaccharides: How stir-frying processing alters structures and enhances antihypertensive efficacy. [PDF]

Ultrason Sonochem
Wang S, Sun H, Lv X, Li J, Du D, Guo F, Zhang C.   +6 more
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Absolute spectral radiance responsivity calibration of sun photometers

Review of Scientific Instruments, 2010
Sun photometers are designed to measure direct solar irradiance and diffused sky radiance for the purpose of atmospheric parameters characterization. A sun photometer is usually calibrated by using a lamp-illuminated integrating sphere source for its band-averaged radiance responsivity, which normally has an uncertainty of 3%–5% at present. Considering
Qiuyun, Xu, Xiaobing, Zheng, Zhengqiang, Li, Wei, Zhang, Xianhua, Wang, Jianjun, Li, Xin, Li   +6 more
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Design and feasibility analysis of shipboard sun-photometer

Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 2020
With the proposal of ocean strategic planning, the measurement of optical parameters and the study of atmospheric models have become particularly important. In order to solve the problem that traditional sun-photometer cannot track the sun accurately on the moving platform at sea, a design scheme of shipboard sun-photometer is proposed for the ...
Qing Liu, Honghua Huang, Heli Wei
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Three-wavelength sun photometer for aerosol characterization

SPIE Proceedings, 1996
A three-wavelength sun-photometer was designed and built. The attenuation of direct solar light, at wavelengths of 0.38 micrometers , 0.50 micrometers and 1.00 micrometers were measured. Silicon photodiodes and interference filters of 10 nm FWHM were used. Aerosols were characterized by angstrom's turbidity formula in terms of coefficients (alpha) and (
Jorge O. Tocho, Carmen Esteban, Amilcar Fasulo, Edmundo J. Rodriguez   +3 more
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Precipitable Water Measurements with Sun Photometers

Journal of Applied Meteorology, 1982
Abstract This paper presents a brief history of spectroscopic and radiometric methods of remotely sensing precipitable water. We demonstrate a new method of calibrating sun photometers with microwave radiometer data to obtain precipitable water, and a new expression is derived for obtaining precipitable water with the 940 nm band that is valid for 1.1 ...
R. E. Bird, R. L. Hulstrom
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An algorithm for the Sun photometer calibration

Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium, 2002
A simple algorithm, based on the traditional long Bouguer's (Langley plot) method, is proposed for calibration of the Sun photometer (SP) and evaluation its accuracy. It has been tested on two SP data sets, collected during 2 oceanic campaigns. >
A.M. Ignatov, I.L. Dergileva, S.M. Sakerin, D.M. Kabanov   +3 more
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Tropical cirrus cloud contamination in sun photometer data

Atmospheric Environment, 2011
Abstract Cirrus clouds are endemic to Southeast Asia and are a source of potential bias in regional passive aerosol remote sensing datasets. Here, performance of the cloud-screening algorithm for the ground-based Aerosol Robotic Network (AERONET) sun photometer data is evaluated for cirrus cloud contamination at Singapore (1.30° N, 103.77° E).
Chew, B.N., Campbell, J.R., Reid, J.S., Giles, D.M., Welton, E.J., Salinas, S.V., Liew, S.C.   +6 more
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Trace-gas measurements with an infrared sun photometer

SPIE Proceedings, 1994
Accurate assessment of the potential impact of greenhouse gases and aerosols on the Earth system can be enhanced by a global monitoring network and can be facilitated by the development of compact, portable optical instruments for field use. The more important of these gases, e.g., methane (CH 4 ), carbon dioxide (CO 2 ), and nitrous oxide (N 2 O ...
John E. Allen, Jr., R. N. Halthore, David A. Glenar, Brian L. Markham   +3 more
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