Results 71 to 80 of about 70,459 (364)
A new lab facility for measuring bidirectional reflectance/emittance distribution functions of soils and canopies [PDF]
Recently, a laboratory measurement facility has been realized for assessing the anisotropic reflectance and emittance behaviour of soils, leaves and small canopies under controlled illumination conditions.
Bartholomeus, H. +7 more
core +5 more sources
International Journal of Metrology and Quality Engineering, 2016 We present a calibration method of UV index meters under a solar simulator based on a spectroradiometer as reference. The reference spectroradiometer is a double-grating-based type that can measure the erythemal effective irradiance ...
Zaini Helmi +3 more
doaj +1 more source
Spectral reflectance of whale skin above the sea surface: a proposed measurement protocol
Remote Sensing in Ecology and Conservation, 2020 Great whales have been detected using very‐high‐resolution satellite imagery, suggesting this technology could be used to monitor whales in remote areas.
Hannah C. Cubaynes +11 more
doaj +1 more source
Water vapour retrieval using the Precision Solar Spectroradiometer
, 2017 . The Precision Solar Spectroradiometer (PSR) is a new spectroradiometer developed at Physikalisch-Meteorologisches Observatorium Davos – World Radiation Center (PMOD–WRC), Davos, measuring direct solar irradiance at the surface, in the 300–1020 nm ...
P. Raptis +6 more
semanticscholar +1 more source
Measuring the Luminance Contrast Sensitivity Function in Peripheral Vision
Color Research &Application, EarlyView.Luminance contrast detection thresholds of frequencies at eccentricities for a person. ABSTRACT We measured luminance contrast sensitivity functions (CSF) of four subjects by using Gabor stimuli up to 56°, 49°, 84°, and 63° in the nasal, superior, temporal, and inferior directions, respectively, of the left‐eye visual field.
Kotaro Kitakami +2 more
wiley +1 more source
Sensors, 2008 The objective of this study was to determine the relationships between nitrogen (N), phosphorus (P), potassium (P), acid detergent fiber (ADF) and neutral detergent fiber (NDF) contents of sainfoin (Onobrychis sativa Lam.) pasture and canopy reflectance.
Sebahattin Albayrak
doaj +1 more source
New Spectroradiometers Complying with the NDSC Standards [PDF]
Journal of Atmospheric and Oceanic Technology, 2006 Abstract The investigation of the effect of solar ultraviolet (UV) and visible radiation on biological organisms and photochemical reactions requires spectral measurements of the desired radiation parameters of high accuracy. The Network for the Detection of Stratospheric Change (NDSC) and the World Meteorological Organization have set ...
Paul E. Johnston +6 more
openaire +2 more sources
Journal of the Science of Food and Agriculture, EarlyView.Abstract BACKGROUND Plants are subject to a variety of stressors that will eventually limit their development and yield. However, analysis of the combination of abiotic and biotic stresses is usually disregarded. The combination of stresses can have synergistic or antagonistic effects and, therefore, they require greater clarification for assertive ...
João Rafael Silva Soares +8 more
wiley +1 more source
EOS Science Poster Series: LAND- Our Changing Earth [PDF]
, 2007 This poster, one in a four-part series, highlights recent images from select NASA Earth Science spacecraft and showcases related research results. The back gives a brief overview of the science and missions behind NASA's study of LAND. Educational levels:
core
Upscaling key ecosystem functions across the conterminous United States by a water-centric ecosystem model [PDF]
, 2011 We developed a water-centric monthly scale simulation model (WaSSI-C) by integrating empirical water and carbon flux measurements from the FLUXNET network and an existing water supply and demand accounting model (WaSSI).
Caldwell, Peter +11 more
core +4 more sources