Results 311 to 320 of about 70,459 (364)

Development of a broadband spectroradiometer

2008 33rd IEEE Photovolatic Specialists Conference, 2008
Spectral measurements of the solar radiation at the Earth's surface are important for meteorological, environmental, photovoltaic, and biomass study etc. Especially a long-term measurements and in-situ measurements are valid and efficient methods. Two types of spectroradiometers were developed for making those measurements in all weather conditions ...
Takeshi Aoshima, Toshikazu Hasegawa, Kato Tadashi, Yanqun Xue   +3 more
openaire   +2 more sources

Improved diffusers for solar UV spectroradiometers [PDF]

AIP Conference Proceedings, 2013
Diffuser heads whose angular response is proportional to the cosine of the zenith angle are needed for global irradiance measurements. Various material samples were measured for their transmission properties to find out the most promising material candidate for use in an improved solar UV diffuser.
Pulli, Tomi, Kärhä, Petri, Mes, Joop, Schreder, Josef, Jaanson, Priit, Manoocheri, Farshid   +6 more
openaire   +5 more sources

Updates of Moderate Resolution Imaging Spectroradiometer on-orbit calibration uncertainty assessments

Journal of Applied Remote Sensing, 2018
. The Moderate Resolution Imaging Spectroradiometer (MODIS) instruments have successfully operated for more than 18 and 16 years, respectively, on-board the NASA’s Earth Observing System Terra and Aqua spacecraft.
X. Xiong, A. Angal, W. Barnes, Hongda Chen, V. Chiang, X. Geng, Yonghong Li, K. Twedt, Zhipeng Wang, T. Wilson, A. Wu   +10 more
semanticscholar   +1 more source

Calibration of a Field Spectroradiometer

Optical Engineering, 1973
The processes used to calibrate a field spectroradiometer are described. The spectro-radiometer uses four CVF's and four detectors with two of each in two separate instruments. Wavelength calibration procedure was to illuminate the aperture of the spectroradiometer with energy containing spectral lines at known wavelengths, and to note the linearity of
Anthony J. La Rocca, Ross W. Leamer
openaire   +2 more sources

A scanning spectroradiometer

Journal of Physics E: Scientific Instruments, 1968
An instrument is described by which the absolute spectral power distribution of light sources can be displayed directly on a pen-recorder. It is based on a grating monochromator which is motor driven at a scanning rate of 100 nm min−1, and the variation with wavelength of the overall instrument response is automatically compensated by an electrical ...
openaire   +3 more sources

A Recording Photoelectric Spectroradiometer

Journal of the Optical Society of America, 1938
A recording spectroradiometer has been constructed for use in absorption spectra measurements in the visible and near infra-red regions. A Hilger quartz monochromator and an emission type photoelectric cell are used. The photoelectric cell current is amplified by a d.c.
V. M. Albers, H. V. Knorr
openaire   +2 more sources

Autonomous field spectroradiometers

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
In field spectroscopy applications the autonomous field spectroradiometer is configured to measure the down-welling irradiance and up-welling radiance, from this it is possible to calculate the reflectance properties of the surface or canopy and how it may change over time and with illumination geometry. This paper reviews the merits and limitations of
openaire   +2 more sources

Diffraction effect in the calibration of the spectroradiometer [PDF]

SPIE Proceedings, 2013
In the imaging optical facility, the light source, the spectroradiometer and the optical path are the three fundamental elements. Most of time the light source is not a dot source and the radiation flux received by the spectroradiometer doesn’t only obey the rule of the geometry optics.
Cai-hong Dai, Jia-lin Yu, Zhi-feng Wu
openaire   +1 more source

Direct Spectral Irradiance Measurements from Rotating Shadowband EKO Grating Spectroradiometer

IEEE World Conference on Photovoltaic Energy Conference, 2018
In this paper, we explore a rotating shadow band (RSB) configuration for the EKO MS-711 spectroradiometer to measure the global, diffuse and direct components of spectral irradiance.
M. Pó, K. Hoogendijk, Will Beuttell, Shibayama Kazunori, E. Takeuchi   +4 more
semanticscholar   +1 more source

A new imaging FTIR spectroradiometer

SPIE Proceedings, 2009
ABB Bomem is expanding its line of infrared remote sensing products with the addition of a new imaging spectroradiometer. That hyperspectral instrument is based on the proven MR FTIR spectroradiometers. This field instrument, called the MR-i, is a fast imaging Fourier Transform spectroradiometer. It generates spectral data cubes in the MWIR and LWIR.
Claude Roy, Christian Vallières, Louis Moreau, Marc-André Soucy, Luc Levesque   +4 more
openaire   +2 more sources