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Work areas must have at least a value of 200 equivalent melanopic lux present for 75% or more work stations between the hours of 09:00 and 13:00 for each day of the year when daylight is incorporated into calculations. If daylight is not taken into account all workstations require lighting at the value of 150 equivalent melanopic lux or greater ...
Photosynthetically active radiation (PAR) designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis. This spectral region corresponds more or less with the range of light visible to the human eye.
The clouds are suspected to be a patchy haze layer over thick iron clouds. This patchy haze layer could be made of sodium sulfide, chromium or manganese sulfide. [17] Another group did observe PSO J318.5-22 with the NTT Js and Ks-band and found a rotation period of 8.45 ± 0.05 hours and an amplitude of 2.4 ± 0.2 % in Js and 0.48 ± 0.08 % in ...
These stellar outer layers can be modeled by different computer programs. Often, calculated models are used, together with other programs, to calculate synthetic spectra for stars . For example, in varying the assumed abundance of a chemical element, and comparing the synthetic spectra to observed ones, the abundance of that element in that ...
In recent years, very high resolution spectrographs on the world's most powerful telescopes have been used to observe and analyse DIBs. [10] Spectral resolutions of 0.005 nm are now routine using instruments at observatories such as the European Southern Observatory at Cerro Paranal, Chile, and the Anglo-Australian Observatory in Australia, and ...
Multispectral imaging measures light in a small number (typically 3 to 15) of spectral bands. Hyperspectral imaging is a special case of spectral imaging where often hundreds of contiguous spectral bands are available. [5]
The eruption of the Philippines volcano - Mount Pinatubo in June 1991 ejected roughly 10 km 3 (2.4 cu mi) of magma and "17 million metric tons"(17 teragrams) of sulfur dioxide SO 2 into the air, introducing ten times as much total SO 2 as the 1991 Kuwaiti fires, [8] mostly during the explosive Plinian/Ultra-Plinian event of June 15, 1991 ...
In the case of global energy flux, the W/m 2 value is obtained by dividing the total energy flow over the surface of the globe (measured in watts) by the surface area of the Earth, 5.1 × 10 14 m 2 (5.1 × 10 8 km 2; 2.0 × 10 8 sq mi). [3]