Effects of Different Illumination and Observation Techniques of Cultivated Soils on Their Hyperspectral Bidirectional Measurements Under Field and Laboratory Conditions
PBN-AR
Instytucja
Wydział Geografii i Studiów Regionalnych (Uniwersytet Warszawski)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
ISSN
1939-1404
EISSN
Wydawca
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI
URL
Rok publikacji
2014
Numer zeszytu
99
Strony od-do
2525 - 2530
Numer tomu
PP
Link do pełnego tekstu
Identyfikator DOI
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Słowa kluczowe
en
Bidirectional reflectance factor (BRF)
field and laboratory measurements
hyperspectral directional reflectance
soil surface roughness
Streszczenia
Język
en
Treść
This paper evaluates the fitting of the hyperspectral bidirectional reflectance data of soil surfaces formed by a cultivator, a pulverizing harrow, and a smoothing harrow, collected in field conditions as illuminated by direct and diffuse solar radiation, to their bidirectional reflectance equivalents measured in the laboratory with only a direct radiation component using the same soil materials shaped such that their roughness was similar to that formed in the field by the farming tools mentioned above. Both kinds of data were measured by the same ASD FieldSpec 3 spectrophotometer attached to goniometric devices, which observed the soil surfaces under the same directions, pointing at various fragments of the surface under field conditions and always pointing at the center of the soil samples under laboratory conditions. The worst average fit for the analyzed soil surfaces did not exceed 36%. The fit was weaker if the soil was spectrally darker with a lower spectrum level, especially at lower solar zenith angles and higher soil surface roughness. It was found that the fit increased from 400 to 450 nm, and decreased especially for wavelengths between 1950 and 2300 nm. A less significant decrease in fit was revealed at around of 700, 940, and 1140 nm.
Cechy publikacji
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:449885
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