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[CF-metadata] Reverse-time trajectory

From: Hattersley, Richard <richard.hattersley>
Date: Mon, 30 Apr 2012 14:36:54 +0100

Hi all,

The CF definitions of discrete sampling geometries define the "trajectory" feature type as "a series of data points along a path through space with monotonically increasing times". This is a stricter stance than the usual CF coordinate definition of "ordered monotonically". What was the reason behind the addition of the "increasing" constraint, and can it be relaxed? We have data sets where a model is run backwards in time.

Thanks,
Richard Hattersley AVD Iris Technical Lead
Met Office FitzRoy Road Exeter Devon EX1 3PB United Kingdom
Tel: +44 (0)1392 885702 Fax: +44 (0)1392 885681
Email: richard.hattersley at metoffice.gov.uk Website: www.metoffice.gov.uk

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