Results 91 to 100 of about 70,459 (364)

High Antarctic coastal productivity in polynyas revealed by considering remote sensing ice‐adjacency effects

Limnology and Oceanography Letters, EarlyView.
Abstract Ocean color‐based estimates of Antarctic net primary productivity (NPP) have indicated low nearshore productivity in ice‐adjacent waters, contrasting with coupled physical–biogeochemical models. To understand this discrepancy, we assessed satellite records of polynya NPP by comparing field data with two satellite imagery datasets derived using
Hilde Oliver, Jessica S. Turner, Alexandre Castagna, Henry Houskeeper, Heidi Dierssen   +4 more
wiley   +1 more source

Early detection of Bactrocera zonata infestation in peach fruit using remote sensing technique and application of nematodes for its control

Kuwait Journal of Science
Early detection and monitoring of the internal aspects of Bactrocera zonata infestation in fruits and vegetables are important for sustainable agriculture. The present study depends on the non-destructive detection of B.
Noura H. Heikal, Magda H. Rady, Bouthaina A. Merdan, Talal S. El-Abbassi, Mervat A. El-Genaidy, Ahmed M. Azazy, Mona S. Yones, Eman E. Essa   +7 more
doaj   +1 more source

A semi‐analytical Bayesian estimate retrieval algorithm for the inversion of remote‐sensing reflectance in optically deep and shallow waters

Limnology and Oceanography: Methods, EarlyView.
Abstract The inverse problem in remote sensing of aquatic environment consists in retrieving optically significant constituents (OSCs) from a spectral measurement of the remote sensing reflectance (Rrs$$ {R}_{\mathrm{rs}} $$).Optically significant constituent includes chlorophyll a concentration (Chl a$$ Chl\ a $$), a proxy of phytoplankton biomass ...
Soham Mukherjee, Raphaël Mabit, Simon Bélanger   +2 more
wiley   +1 more source

RPV Model Parameters Based on Hyperspectral Bidirectional Reflectance Measurementsof Fagus sylvatica L. Leaves

Remote Sensing, 2009
The bidirectional reflectance parametric and semi-empirical Rahman-Pinty-Verstraete (RPV) model was inverted based on Bidirectional Reflectance Factor (BRF) measurements of 60 Fagus sylvatica L.
Dimitrios Biliouris, Dimitry van der Zande, Willem W. Verstraeten, Jan Stuckens, Bart Muys, Philip Dutré, Pol Coppin   +6 more
doaj   +1 more source

Estimating spectral irradiance from measurements in seven spectral bands

, 2003
Accurate measurement and characterisation of fluctuations in the irradiance environment is important for many areas of optical remote sensing. This paper reports a method of estimating spectral irradiance over the VNIR region (400 - 1100nm) from the ...
Milton, E.J., Rollin, E.M.
core  

Spectral emission measurement of igneous rocks using a spectroradiometer [PDF]

, 1970
Spectroradiometer is used for either close or remote identification of rocks not heated to high temperatures. Instrument yields reproducible data spectra with excellent signal-to-noise ratios and readily identifiable spectral details, including ...
Hunton, W. D.
core   +1 more source

Relaxation of the leaf economics spectrum within and across quaking aspen Populus tremuloides genotypes

Oikos, EarlyView.
Plant functional traits typically show strong covariation, e.g. as in the worldwide leaf economics spectrum (LES). Covariation is thought to arise from selective forces and physical constraints. However, processes shaping covariation at interspecific scales may differ from those at intraspecific scales.
Jolanta Rieksta, Bente J. Graae, Kenny Helsen, Rozália E. Kapás, Richard Strimbeck, Benjamin W. Blonder   +5 more
wiley   +1 more source

Spectral measurements of underwater downwelling radiance of inland water bodies

Tellus: Series A, Dynamic Meteorology and Oceanography, 2013
The apparatus exploited in this work is composed of an optical cable linked to a portable FieldSpec UV/VNIR that records the spectral downwelling radiance in underwater environment, allowing us to calculate the shortwave attenuation coefficient in water.
Miguel Potes, Maria João Costa, Rui Salgado, Daniele Bortoli, AntãNio Serafim, Patrick Le Moigne   +5 more
doaj   +1 more source

Evaluation and Normalization of Cloud Obscuration Related BRDF Effects in Field Spectroscopy

Remote Sensing, 2009
The impact of target bidirectional reflectance in dual field of view spectroscopy was described and quantified using field measurements and ray-tracing simulations.
Jan Stuckens, Ben Somers, Willem W. Verstraeten, Rony Swennen, Pol Coppin   +4 more
doaj   +1 more source

The temporal dynamics of calibration target reflectance

, 2003
A field experiment investigated the hypothesis that the nadir reflectance of calibration surface substrates (asphalt and concrete) remains stable over a range of time-scales.
Anderson, K., Milton, E.J., Rollin, E.M.
core