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What is the difference between the sgpallruc20isobX1.00 and sgpallruc20hybrX1.00 datastreams?

April 26, 2017datastreams difference

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What is the difference between the sgpallruc20isobX1.00 and sgpallruc20hybrX1.00 datastreams?

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The sgpallruc20isobX1.00 are isobaric files. The sgpallruc20hybrX1.00 are hybrid. The hybrid data uses a combination of two types of vertical coordinates – isentropic and sigma. Hybrid is short for “hybrid-b isentropic-sigma coordinate”.