Projections, grids and model resolutions

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Rotated/Tilted Mercator Projection (2011)

Published on 25 September 2011

The rotated/tilted Mercator geometry is introduced. The associated computations are developed. These computations involve formulae for : the direct geometric transform, the reverse geometric transform, the quantities associated to Coriolis force, the map factor, the transformation of vectors (…)

Geometry package for ALADIN & AROME LAM (Dec 2009)

Published on 10 December 2009
by Patricia

Sommaire Projections used in ALADIN (…) Les projections utilisÃ©es (…)

(access to French version, pour version franÃ§aise)

This document describes the Fortran package for the management of the â€œgeometryâ€ of the ALADIN & AROME LAM. This â€œgeometryâ€ is a (…)

Graphics about possible future discretizations and resolutions in ArpÃ¨ge and Aladin-France (April 2007)

Published on 3 April 2007
by Patricia

Sommaire Map of ARPEGE horizontal (…) Vertical levels cast in (…) Vertical levels cast in (…) Truncature T358C2.4 T538C2.4 T799C2.4 for the whole sphere zoomed over Europe for all the atmosphere zoom at the tropopause 46 versus 60 levels

New geometry routines for ALADIN (January 2006)

Published on 19 January 2006
by Jean-Daniel GRIL

This document explains the new projection routines with an emphasis on bugfixes at the level of Cycle 29.t2 to 30.t1. It explains : the new "cadre" for ALADIN files, use of NCADFORM key, in depth description of parameter setup and checks in sufpg1, ...

Both English and French documentions are (…)

Published on June 2002

Projections in ALADIN by Jean-Daniel Gril, June 2002 : the different projections in ALADIN : secantes, tangentes, stereographic, polaire, ... the formulae Annex : Lambert(1) and Lambert(2)