Results 61 to 70 of about 52,709 (270)
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
Comparison of laboratory calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) at the beginning and end of the first flight season [PDF]
Spectral and radiometric calibrations of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) were performed in the laboratory in June and November, 1987, at the beginning and end of the first flight season.
Chrien, Thomas G. +4 more
core +2 more sources
Land Degradation &Development, EarlyView.ABSTRACT Forest ecosystem services (ESs) are garnering increasing public attention as awareness grows regarding society's fundamental dependence on them for well‐being. Forest fires, one of the major disturbances of ESs, are becoming more frequent and destructive, exacerbated in part by climate change.
Emanuele Spada +6 more
wiley +1 more source
MODISTools - downloading and processing MODIS remotely sensed data in R [PDF]
, 2014 Remotely sensed data – available at medium to high resolution across global spatial and temporal scales – are a valuable resource for ecologists. In particular, products from NASA's MODerate-resolution Imaging Spectroradiometer (MODIS), providing twice ...
Andy Purvis +6 more
core +2 more sources
Discomfort luminance level of head-mounted displays depending on the adapting luminance [PDF]
, 2020 The Images in an immersive head-mounted display (HMD) for virtual reality provide the sole source for visual adaptation. Thus, significant, near-instantaneous increases in luminance while viewing an HMD can result in visual discomfort.
Ha, Hyeyoung +3 more
core +1 more source
Spatiotemporal Fire Patterns and Post‐fire Forest Change in Peru (2000–2021)
Land Degradation &Development, EarlyView.ABSTRACT Fire is increasingly more frequent and severe in many tropical regions, leading to significant forest loss, diminished biodiversity, and reduced Nature's contributions to people (NCPs). In this study, we analyzed the spatiotemporal patterns of fire in Peru and its regions, focusing on: (1) burned area, (2) size, and (3) number of fires, using ...
Maricel Móstiga +3 more
wiley +1 more source
Detection of grapevine leaf stripe disease symptoms by hyperspectral sensor
Phytopathologia Mediterranea, 2018 Hyperspectral sensors can measure reflectance in a wide range of the electromagnetic spectrum. These can be used as an indirect method for detecting plant disease, by comparing the specific spectral signatures between symptomatic and asymptomatic ...
Amanda JUNGES +3 more
doaj +1 more source
Limnology and Oceanography: Methods, EarlyView.Abstract Benthic incubation chambers enclose a known volume of water overlying a known area to measure water chemistry changes and are typically used to quantify the metabolic activity of benthic organisms or communities. Here we present an economical benthic incubation chamber for shallow, low‐flow environments, built using off‐the‐shelf components ...
Luke D. Groff +2 more
wiley +1 more source
Estimating Cotton Nitrogen Nutrition Status Using Leaf Greenness and Ground Cover Information
Remote Sensing, 2015 Assessing nitrogen (N) status is important from economic and environmental standpoints. To date, many spectral indices to estimate cotton chlorophyll or N content have been purely developed using statistical analysis approach where they are often subject
Farrah Melissa Muharam +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