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.TH Lagrantohelp
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.SH NAME
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.B Lagranto -
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calculate trajectories for ECMWF analyses and forecasts
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.SH SYNOPSIS
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.B lagrantohelp [topic|tutorial|reference|future] -
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show this man page or the one corresponding to a specific topic. All
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.I
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underlined
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names in this document have their own man page. If "tutorial" is chosen,
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a detailed tutorial for Lagranto is opened. For "reference" a PDF document with all man pages is opened. Finally, with option "future" plans for additional features will be listed.
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.SH DESCRIPTION
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Lagranto is a software tool (UNIX shell-scripts and Fortran programs) to analyze
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Lagrangian aspects of atmospheric phenomena. It requires a time-series of
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3-dimensional wind fields (and if necessary further variables) on netCDF files.
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.SH CORE PROGRAMS
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.TP 15
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.I create_startf
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create starting files
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.TP 15
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.I caltra
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calculate trajectory positions
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.TP 15
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.I trace
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trace meteorological fields along trajectories
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.TP 15
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.I select
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select trajectories based on several criteria
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.TP 15
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.I density
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create netCDF files with trajectory densities
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.SH TRAJECTORY TOOLS
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.TP 15
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.I extract
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extract single trajectories, times or columns from a trajectory file
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.TP 15
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.I list2lsl
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transform a (longitude,latitude,pressure) list into a trajectory file
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.TP 15
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.I lsl2list
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transform a trajectory file into a (longitude,latitude,pressure) list
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.TP 15
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.I mergetra
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merge two trajectory files
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.TP 15
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.I reformat
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change the format of a trajectory file
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.TP 15
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.I timeres
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change the time resolution of a trajectory file with interpolation
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.TP 15
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.I trainfo
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write some information about a trajectory file
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.TP 15
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.I difference
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calculate the difference between two trajectory files
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.SH NETCDF TOOLS
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.TP 15
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.I changecst
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change the constants filename on a netCDF file
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.TP 15
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.I changet
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change the time on a netCDF file
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.TP 15
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.I getmima
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get the minimum and maximum value of a field on a netCDF file
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.TP 15
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.I getvars
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get a list of fields on a netCDF file
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.SH GENERAL TOOLS
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.TP 15
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.I newtime
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get a new date from an initial date and an offset in hours
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.TP 15
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.I gettidiff
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get the time difference between two dates
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.SH VISUALISATION
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Lagranto comes with two packages for visualisation of trajectories: one based on Matlab (www.mathworks.com) and one based on NCL (www.ncl.ucar.edu). Examples are provided in folder "figure" of the Lagranto installation.
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.SH AUTHOR
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Written by Michael Sprenger and Heini Wernli (January 2011)
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