Temat: backscattering - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters
Autorzy:: Pelevin, V.N.
Rostovtseva, V.V.
Powiązania:: https://bibliotekanauki.pl/articles/48226.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: bio-optical modelling
backscattering
sea water
shelf water
light absorption
irradiance
Opis:: A method for estimating the water backscattering coefficient was put forward on the basis of experimental data of diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance. Calculations were carried out for open sea waters of different types and the spectral dependencies were found (‘anomalous’ spectra) and explained. On this basis, a new model of light backscattering on particles in the sea is proposed. This model may be useful for modelling remote sensing reflectance spectra in order to solve the inverse problems of estimating the concentration of natural admixtures in shelf waters.
Źródło:: Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Spectral dependence of the correlation between the backscattering coefficient and the volume scattering function measured in the Southern Baltic Sea
Autorzy:: Freda, W.
Powiązania:: https://bibliotekanauki.pl/articles/47893.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: volume scattering function
backscattering coefficient
marine optics
Baltic Sea
optical property
sea water
spectral variability
Opis:: Direct measurements of the backscattering coefficient bb require the determination of the Volume Scattering Function (VSF) and its integration over a backward hemisphere. In sea water they are difficult and are therefore carried out very rarely. That is why the backscattering coefficient is much more frequently obtained with so-called single angle scattering meters: these operate by measuring the VSF for a fixed angle region of the backward hemisphere. This article examines the spectral variability of the correlation between directly measured backscattering coefficients and VSFs. Also presented are the averaged slopes of VSF spectra, measured in southern Baltic waters over a wide range of scattering angles.
Źródło:: Oceanologia; 2012, 54, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simple statistical formulas for estimating biogeochemical properties of suspended particulate matter in the Southern Baltic Sea potentially useful for optical remote sensing applications
Autorzy:: Wozniak, S.B.
Powiązania:: https://bibliotekanauki.pl/articles/47701.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: biogeochemical property
suspended particulate matter
particulate organic carbon
inherent optical property
chlorophyll a
light absorption
backscattering coefficient
remote sensing
Baltic Sea
Źródło:: Oceanologia; 2014, 56, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A comparison of ASCAT wind measurements and the HIRLAM model over the Baltic Sea
Autorzy:: Sluzenikina, J.
Mannik, A.
Powiązania:: https://bibliotekanauki.pl/articles/48369.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: backscattering
Baltic Sea
HIRLAM model
numerical weather prediction
ocean surface
sea surface
stormy season
wind direction
wind field
wind scatterometer
wind speed
Opis:: This paper presents a comparison of the wind data measured by the ASCAT polar-orbiting satellite scatterometer and winds forecast by the numerical weather prediction model HIRLAM in the Baltic Sea region during the stormy season in 2009. Two different resolution models were used in the comparison. Mutual quality and uncertainty characteristics of the measurements and predictions are determined. The results of the study show that the ASCAT wind data are well correlated with the HIRLAM predicted winds, which raises the credibility of both data sources in operational and hindcasting applications over the Baltic Sea. A case of phase error in a HIRLAM forecast of cyclonic activity over the Baltic Sea is discussed.
Źródło:: Oceanologia; 2011, 53, (1-TI)
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Revisiting the role of oceanic phase function in remote sensing reflectance
Autorzy:: Freda, W.
Piskozub, J.
Powiązania:: https://bibliotekanauki.pl/articles/48003.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: marine optics
remote sensing
scattering
backscattering
volume scattering function
angular variation
scattering light intensity
inherent optical property
sea surface
solar radiation
angular distribution
Opis:: The effect of angular structure differences between measured and best-fit analytical phase functions of the equivalent backscattering ratio on calculated reflectance values was studied and shown to be significant. We used a Monte Carlo radiative transfer code to check the effect of choosing different analytical (several Fournier- Forand (1994) and Henyey-Greenstein (1941)) phase functions with backscattering ratios identical to the ‘classical’ average Petzold function. We show that the additional variability of the resulting water leaving radiance is about 7% (4% between the Fournier-Forand functions themselves) for most scenarios. We also show a previously unknown maximum of the discrepancy (up to 10%) for highly scattering waters. We discuss the importance of relative differences in phase function for different angular ranges to this maximum and to the behaviour of the discrepancy as a function of solar zenith angle.
Źródło:: Oceanologia; 2012, 54, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki