Results 41 to 50 of about 21,471 (126)
Limnology and Oceanography: Methods, Volume 23, Issue 4, Page 261-272, April 2025.Abstract Photosynthetic available radiation (PAR) is the light usable by photosynthetic organisms. Photosynthetic available radiation measurements at depth are required to quantify the light availability for primary production. Direct PAR measurements may be measured with full‐spectrum quantum sensors for the range 400 to 700 nm.
Jaime Pitarch +7 more
wiley +1 more source
Space Weather, Volume 23, Issue 4, April 2025.Abstract Accurate modeling of thermospheric impact of high solar and geomagnetic activities is crucial for safeguarding our space‐based infrastructure. However, current modeling capabilities are still unable to accurately predict thermospheric density, which is a key parameter for calculating satellite drags.
Atishnal E. Chand +3 more
wiley +1 more source
, 2019 A new physically based method to estimate hemispheric-directional reflectance factor (HDRF) from lightweight multispectral cameras that have a downwelling irradiance sensor is presented.
Cubero-Castan, Manuel +3 more
core +1 more source
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 6, 28 March 2025.Abstract Long‐term variability and tendencies in monthly mean semidiurnal tide (12‐hr) in zonal (U12) and meridional (V12) winds are investigated in northern polar mesosphere and lower thermosphere (MLT; ∼80–100 km) using meteor radar observations during 1999–2022 over Esrange (67.9°N, 21.1°E). The climatological mean of U12 and V12 amplitudes peak (up
K. Ramesh +3 more
wiley +1 more source
Determination of combustion gas temperatures by infrared radiometry in sooting and nonsooting flames [PDF]
Flame temperatures in nonsooting and sooting environments were successfully measured by radiometry for pre-mixed propane-oxygen laminar flames stabilized on a water-cooled, porous sintered-bronze burner. The measured temperatures in the nonsooting flames
Gracia-Salcedo, Carmen M. +1 more
core +1 more source
Quantum Cloning for Absolute Radiometry
Physical Review Letters, 2010 In the quantum regime information can be copied with only a finite fidelity. This fidelity gradually increases to 1 as the system becomes classical. In this article we show how this fact can be used to directly measure the amount of radiated power. We demonstrate how these principles could be used to build a practical primary standard.
Sanguinetti, Bruno +4 more
openaire +6 more sources
Basic data requirements for microwave radiometer systems [PDF]
Microwave radiometry has emerged over the last two decades to become an integral part of the field of environmental remote sensing. Numerous investigations were conducted to evaluate the use of microwave radiometry for atmospheric, oceanographic ...
Lawrence, R. W.
core +1 more source
Multilayer infrared beamsplitter film system [PDF]
, 1969 Multilayer infrared beamsplitter film system on a potassium bromide crystal substrate is operational over a wavelength range of 2.5 to 25 microns with nearly equal broadband reflectance and transmittance.
Bastien, R. C., Heinrich, P. L.
core +1 more source
Ground data investigations Mt. Lassen, site 56-mission 76 [PDF]
Microwave radiometry and infrared photography for meteorological ...
Brennan, P. A. +2 more
core +1 more source
Tropospheric Phase Calibration in Millimeter Interferometry
, 1999 We review millimeter interferometric phase variations caused by variations in the precipitable water vapor content of the troposphere, and we discuss techniques proposed to correct for these variations.
Asaki +40 more
core +2 more sources