Results 21 to 30 of about 26,343 (300)

The evolved circumbinary disk of AC Her: a radiative transfer, interferometric and mineralogical study [PDF]

, 2015
We aim to constrain the structure of the circumstellar material around the post-AGB binary and RV Tauri pulsator AC Her. We want to constrain the spatial distribution of the amorphous as well as of the crystalline dust.
de Vries, B. L., Hillen, M., Menu, J., Min, M., Mulders, G. D., Van Winckel, H.   +5 more
core   +2 more sources

Machine Learning Automatic Model Selection Algorithm for Oceanic Chlorophyll-a Content Retrieval

Remote Sensing, 2018
Ocean Color remote sensing has a great importance in monitoring of aquatic environments. The number of optical imaging sensors onboard satellites has been increasing in the past decades, allowing to retrieve information about various water quality ...
Katalin Blix, Torbjørn Eltoft
doaj   +1 more source

Empirical Remote Sensing Algorithms to Retrieve SPM and CDOM in Québec Coastal Waters

Frontiers in Remote Sensing, 2022
In most coastal waters, riverine inputs of suspended particulate matter (SPM) and colored dissolved organic matter (CDOM) are the primary optically active constituents. Moderate- and high-resolution satellite optical sensors, such as the Operational Land
Raphaël Mabit, Raphaël Mabit, Carlos A. S. Araújo, Rakesh Kumar Singh, Simon Bélanger   +4 more
doaj   +1 more source

Infrared High-Resolution Spectroscopy of Post-AGB Circumstellar Disks. I. HR 4049 - The Winnowing Flow Observed? [PDF]

, 2007
High-resolution infrared spectroscopy in the 2.3-4.6 micron region is reported for the peculiar A supergiant, single-lined spectroscopic binary HR 4049. Lines from the CO fundamental and first overtone, OH fundamental, and several H2O vibration-rotation ...
Bakker E. J., Bakker E. J., Beintema D. A., David L. Lambert, Grevesse N, Kenneth H. Hinkle, Mathis J. S., Sean D. Brittain, van Winckel H., Waelkens C., Waelkens C., Waelkens C., Waters L. B. F. M., Waters L. B. F. M.   +13 more
core   +3 more sources

Empirical Formulas for Estimating Backscattering and Absorption Coefficients in Complex Waters from Remote-Sensing Reflectance Spectra and Examples of Their Application

Sensors, 2019
Many standard methods used for the remote sensing of ocean colour have been developed, though mainly for clean, open ocean waters. This means that they may not always be effective in complex waters potentially containing high concentrations of optically ...
Sławomir B. Woźniak, Mirosław Darecki, Sławomir Sagan   +2 more
doaj   +1 more source

Classification of Several Optically Complex Waters in China Using in Situ Remote Sensing Reflectance

Remote Sensing, 2015
Determining the dominant optically active substances in water bodies via classification can improve the accuracy of bio-optical and water quality parameters estimated by remote sensing.
Qian Shen, Junsheng Li, Fangfang Zhang, Xu Sun, Jun Li, Wei Li, Bing Zhang   +6 more
doaj   +1 more source

Spatio-Temporal Variability of Phytoplankton Primary Production in Baltic Lakes Using Sentinel-3 OLCI Data

Remote Sensing, 2020
Phytoplankton primary production (PP) in lakes play an important role in the global carbon cycle. However, monitoring the PP in lakes with traditional complicated and costly in situ sampling methods are impossible due to the large number of lakes ...
Tuuli Soomets, Kristi Uudeberg, Kersti Kangro, Dainis Jakovels, Agris Brauns, Kaire Toming, Matiss Zagars, Tiit Kutser   +7 more
doaj   +1 more source

CAAS: an atmospheric correction algorithm for the remote sensing of complex waters [PDF]

Annales Geophysicae, 2012
The current SeaDAS atmospheric correction algorithm relies on the computation of optical properties of aerosols based on radiative transfer combined with a near-infrared (NIR) correction scheme (originally with assumptions of zero water-leaving ...
P. Shanmugam
doaj   +1 more source

A close look into the carbon disk at the core of the planetary nebula CPD-568032 [PDF]

, 2006
We present high spatial resolution observations of the dusty core of the Planetary Nebula with Wolf-Rayet central star CPD-568032. These observations were taken with the mid-infrared interferometer VLTI/MIDI in imaging mode providing a typical 300 mas ...
A. A. Zijlstra, A. Acker, A. Collioud, A. Rothkopf, Akeson, B. Lopez, Chesneau, Chesneau, Chesneau, Chevalier, Cohen, Cohen, Cohen, Corradi, Crowther, De Marco, De Marco, De Marco, De Marco, Draine, E. Lagadec, G. C. Clayton, Gorny, Iben, Icke, Joblin, Kwok, Lagadec, Leinert, Markwick-Kemper, Mathis, O. Chesneau, O. De Marco, Richichi, S. Wolf, Sahai, Sahai, Sahai, Sahai, Schertl, Shakura, Stasinska, Waters, Waters, Waters, Wolf, Wolf, Wood, Zijlstra   +48 more
core   +6 more sources

Extended rotating disks around post-AGB stars [PDF]

, 2013
There is a group of binary post-AGB stars that show a conspicuous NIR excess, usually assumed to arise from hot dust in very compact possibly rotating disks.
Alcolea, J., Bujarrabal, V., Castro-Carrizo, A., Santander-Garcia, M., Van Winckel, H.   +4 more
core   +2 more sources