نتایج جستجو برای: uv–vis spectrophotometry

تعداد نتایج: 9311  

2007
Halldór Ármannsson

Sampling and analysis provide the data for all geochemical interpretation and thus it is imperative that these tasks be performed by trained personnel with insight into possible errors. Different types of containers (glass, or plastic, amber or transparent) and different pre-treatment (filtering, freezing, addition of chemicals) is needed for the various constituents determined. Some constituen...

2003
Mark S. Robinson Erick Malaret Travis White

[1] We have successfully characterized the Clementine HIRES multispectral sensor entirely from inflight measurements. Relative calibration is obtained through dark subtraction (additive) and sensor spatial nonuniformity (multiplicative) on a pixel-by-pixel basis. Relative residuals from frame-to-frame are typically less than 1%. Absolute coefficients are obtained through comparisons with calibr...

2005
P. G. Lucey

Introduction: Lunar basalts exhibit obvious variations in ultraviolet-visible (UVVIS) color and these variations have been attributed to Ti content [1], the major compositional variable in mare basalts. Charette [2] first showed that Ti content in lunar samples is correlated with telescopic measurements of UVVIS ratio in mature (agglutinate rich) basaltic regolith, whereby samples with high TiO...

2009
MAPPER G. Kramer J.-P. Combe T. McCord C. Pieters J. Head L. Taylor M. Staid

Introduction The Moon Mineralogy Mapper (M), which flew on India’s Chandrayaan-1 has provided the lunar science community with a richest view of our Moon to date. Information of the lunar surface returned by M provided the first conclusive evidence of the presence of OH, and possibly H2O at the poles, and in isolated locations as far down as the equator [1]. The coming discoveries and new views...

2015
Md. Kudrat E. Zahan Md. Abdul Alim Al Bari Md. Abul Bashar Laila Arjuman Banu M. M. Haque M. Saidul Islam

The synthesis and characterization of mixed ligand complexes of Fe (III) with tartaric acid/succinic acid and heterocyclic amines. These complexes were characterized on the basis of elemental analysis, conductometric, magnetic measurements, UVvis, IR spectral studies. All the complexes were found electrolytic and paramagnetic in nature with high spin octahedral structure. The synthesized comple...

2003
Lin Li John F. Mustard

[1] Multiple end-member spectral mixture analysis (MESMA) was applied to the Clementine UVVIS global 1 km multispectral data set, and the resulting highland material fraction image was used to investigate highland contamination of mare surfaces by impact cratering. MESMA decomposes each pixel with the number of end-members fewer than the number of the spectral bands of Clementine UVVIS data. Th...

2005
J. J. Gillis P. G. Lucey B. A. Campbell B. R. Hawke

CLEMENTINE 2.7 μm DATA AND 70-CM EARTH-BASED RADAR DATA PROVIDE ADDITIONAL CONSTRAINTS FOR UVVIS-BASED ESTIMATES OF TiO2 CONTENT FOR LUNAR MARE BASALTS. J. J. Gillis, P. G. Lucey, B. A. Campbell, and B. R. Hawke, Hawaii Institute of Geophysics and Planetology, University of Hawaii, 1680 East-West Road, POST 515, Honolulu, HI 96822 ([email protected]), 2Center for Earth and Planetary Studie...

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