Daily composite wind fields from Oceansat-2 scatterometer

Oceansat-2 scatterometer (OSCAT) is an active microwave sensor, intended to provide ocean surface wind vectors over the global oceans. In the present work, an attempt has been made to generate daily composites of OSCAT Level-3 (L3) wind vectors using Data-Interpolating Variational Analysis (DIVA) me...

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Bibliographic Details
Published in:Remote sensing letters 2014-03, Vol.5 (3), p.258-267
Main Authors: Jayaram, Chiranjivi, Udaya Bhaskar, Tata V S, Swain, Debadatta, Rama Rao, Eluri Pattabhi, Bansal, Saurabh, Dutta, Dibyendu, Rao, Kalluri Hanumantha
Format: Article
Language:English
Subjects:
Applied geophysics
Deviation
Earth sciences
Earth, ocean, space
Exact sciences and technology
Indian Ocean
Internal geophysics
Interpolation
Mathematical analysis
oceans
Particulate composites
remote sensing
Scatterometers
Stresses
value-added products
Vectors (mathematics)
wind
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Summary:Oceansat-2 scatterometer (OSCAT) is an active microwave sensor, intended to provide ocean surface wind vectors over the global oceans. In the present work, an attempt has been made to generate daily composites of OSCAT Level-3 (L3) wind vectors using Data-Interpolating Variational Analysis (DIVA) method from ascending and descending passes over the Indian Ocean region. This could be useful for operational purposes and in generating value-added products like wind stress and curl of wind stress. The daily composite wind vectors of zonal (U) and meridional (V) components have been validated by comparing with Advanced Scatterometer (ASCAT) and wind from in situ buoys for the year 2012. Wind composites thus generated using DIVA are found to match well with in situ , and ASCAT wind products. Minor deviations are observed with respect to ASCAT wind, which could be attributed to the difference in interpolation techniques used for the two scatterometer products. Given that the repeat period of ASCAT is 5 days and that of OSCAT is only 2 days, OSCAT wind products could be conveniently used for real-time met-ocean studies.
ISSN:2150-7058
2150-704X
2150-7058
DOI:10.1080/2150704X.2014.898191