The phrase "absolute irradiance" is correct and usable in written English.
It can be used in scientific contexts, particularly in fields like physics or astronomy, to refer to the total power of radiation received per unit area.
Example: "The absolute irradiance measured at the surface of the planet provides crucial data for understanding its climate."
Alternatives: "total irradiance" or "overall irradiance".
The moon-planet separation distance will be smaller than for the planet-star system; the absolute irradiance of the moon will be very small; the planet itself is not resolvable as more than a single pixel.
White is a glossy white PVC sheet, and Alu is a tube of aluminium foil kept in place towards the wall by stiff ring-formed plastic tubings Open image in new window Fig. 3 Differences in absolute irradiance spectrum between mesocosm tanks with three different surfaces on the inside walls.
The mesocosm tanks were filled with tap water, the absolute irradiance was measured at 0.3, 1, 2, 3, 4 and 4.4 m in depth, the water-column irradiance was calculated by trapezoid depth integration, and the results shown are relative to those for Alu.
The illumination spectra I in the forest were measured as the absolute irradiance spectra using the USB2000 spectrometer calibrated with a 3100 K tungsten halogen calibration light source (LS-1-CAL, Ocean Optics).
Accordingly, we next calculated their steady-state firing as a function of absolute irradiance.
The spectroradiometer setup was calibrated for absolute irradiance following the same procedure described in the Characterization of background conditions section.
An absolute irradiance-calibrated Laser Induced Incandescence (LII) technique and a standard particle image velocimetry (PIV) technique were utilized to collect quantitative data on soot volume fraction and corresponding flow strain rates of diluted ethylene-air non-premixed counterflow flames.
The absolute NIR irradiance level was measured with an irradiance sensor attached to a calibrated spectroradiometer (Jaz ULM-200, Ocean Optics, USA).
The absolute total irradiance was scaled to the PMOD composite (Fröhlich and Lean 1998; Fröhlich 2006) by a factor of 0.9965.
In absolute terms, irradiance differences decreased with depth (Fig. 2a c), whereas relative differences between both Alu and White and Alu and Black could reach between 200 and 300% in the region 500 650 nm in the deeper part of the water column.
The SOLSPEC instrument measures the absolute solar spectral irradiance from 200 to 2500 nm.
