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If you know. of corrections or additions, please send. Where practical, we would like to include WWW links to information. HTML version of this document. Other useful guides to utilities that can handle net. CDF data include ARM's list of. ARM- tested net. CDF data tools, which includes some downloadable. NOAA Geophysical. Fluid Dynamics Laboratory. CDF utilities. Freely Available Software. The ARM Program has developed. ANDX (ARM. Net. CDF Data e. Xtract). a command- line utility designed for routine examination and. Data can be displayed. ASCII data. Whether displayed graphically or extracted. ASCII, results can be saved to disk or viewed on screen. Net. CDF ASCII e. Xtract) is a scaled- down version of ANDX - - it is. ASCII data. All features of ANDX pertaining. ANAX. The ARM Program has developed ANTS (ARM Net. CDF Tool. Suite), a collection of net. CDF tools and utilities providing. ANTS is based on. Chuck Denham. The utilities within nctools were. CDF library, the. ARM standard net. CDF. The original functions from nctools were intended mainly for the. CDF elements. ARM. CDF files. Additional functions have special support for. Functions have been added to. CDF files, comparing the structure or content of files. Essentially every type of net. CDF library function call is. ANTS. In this way then, this open- source collection of. CDF tasks. See the website for more information. ARGOS (inter. Active th. Ree- dimensional. Graphics Ob. Servatory) is a new IDL- based interactive 3. D visualization. tool, developed by David N. Bresch and Mark. A. Liniger at the Institute for Atmospheric Science at the Swiss Federal Institute. Technology, ETH, Zürich. A highly optimized graphical user interface allows quick and elegant creation. D graphics (volume rendering, isosurfaces..), including Z- buffered. Xray images, 3. D trajectories. The net. CDF. data format is preferred, but any other format can be read by providing an IDL. FORTRAN or C or C++) interface. Some toolboxes (for atmospheric model output. IDL, FORTRAN or C code). All interactive activities are tracked. ARGOS in batch script mode. Information about copyright and licensing. For further information and installation, please. E- mail to: bresch@atmos. The Climate Data Analysis Tool. CDAT), developed by the Program for Climate Model Diagnosis. Intercomparison (PCMDI) at Lawrence Livermore National Laboratory, provides. It provides the necessary tools to diagnose. It includes the ability to ingest. CDF, HDF, DRS, and Gr. ADS/GRIB format. the Visualization and Computation System (VCS) module, visually displays and. Library of AMIP Data Transmission. Standards (LATS) module outputs data in the machine- independent net. CDF or Gr. ADS/GRIB. In addition, the Command Line Interface (CLI) module allows. CDAT to receive argument and function input via the command line, and the Graphical. User Interface (GUI) allows CDAT to receive argument and function input via. The software, which runs as a standalone process or within PCMDI's. Visualization and Computation System (VCS), provides climate scientists with. CDAT includes a. set of pre- defined functions to allow the user to manipulate the data and. The software has a gradual learning curve, allowing. CDFconvert package provided by the Mesoscale Research Group. Mc. Gill University/SUNY Albany, is designed to address data conversion. COARDS. convention. CDFconvert converts regular Cylindrical Equidistant. Lat/Long) and Gaussian (Spherical) net. CDF grids into either the. Canadian RPN Standard File or GEMPAK file formats. MRG CDFconvert has the flexibility to handle. CDF files generated by a number of sources, including NCEP and. ECMWF. User- definable conversion tables make the extension of the. Joe Sirott of NOAA's Pacific Marine Environmental Laboratory has. CDF files over a network. Fast synchronization times are. It is. built on the Open Source rsync. Special handling of net. CDF files for faster synchronization. Much faster updates of large numbers of small net. CDF files. In- place updates of large net. CDF files. The latest version should run on Linux variants and Solaris. More information is available at the cdfsync website. Uwe Schulzweida at the Max Planck Institute for Meteorology has developed. CDO, a collection of. Operators to manipulate and analyze. Climate Data files. Supported file formats include net. CDF and GRIB. There are more than 3. The following. table provides a brief overview of the main categories. File information (info, sinfo, diff, ..). File operations (copy, cat, merge, split*, ..). Selection (selcode, selvar, sellevel, seltimestep, ..). Missing values (setctomiss, setmisstoc, setrtomiss). Arithmetic (add, sub, mul, div, ..). Mathematical functions (sqrt, exp, log, sin, cos, ..). Comparision (eq, ne, le, lt, ge, gt, ..). Conditions (ifthen, ifnotthen, ifthenc, ifnotthenc). Field statistics (fldsum, fldavg, fldstd, fldmin, fldmax, ..). Vertical statistics (vertsum, vertavg, vertstd, vertmin, ..). Time range statistics (timavg, yearavg, monavg, dayavg, ..). Field interpolation (remapbil, remapcon, remapdis, ..). Vertical interpolation (ml. Time interpolation (inttime, intyear). As an example of use of CDO, converting. GRIB to net. CDF can be as simple as. Gr. ADS). cdo - r - f nc copy file. ECMWF reanalysis on a reduced grid. R - f nc copy file. More information is available on the CDO homepage. The Center for Clouds Chemistry and Climate (C4) Integrated Data Systems (CIDS) group has developed several useful. CDF utilities. cdf. Writes an IDL script to read a Net. CDF file. cdf. 2c: Writes C code to read a Net. CDF file. cdf. 2fortran: Writes FORTRAN source code to read a Net. CDF file. cdf. 2asc: Dumps Net. CDF data to an ASCII file. The source for these utilities can be downloaded from CIDS Net. CDF Visualization. Tools site. The CSIRO MATLAB/net. CDF interface. is now available from the CSIRO Marine Laboratories. The CSIRO MATLAB/net. CDF interface is run from within MATLAB and has a simple. It has options for automatically handling missing values, scale factors. It is, however, limited to retrieving data from. CDF files. The basis of the interface is a machine- dependent mex- file called. Rather than call the mex- file. Chuck Denham's. net. CDF toolbox and the CSIRO MATLAB/net. CDF interface described here. For. read- only access to existing net. CDF data, the CSIRO interface has a simpler. CDF Toolbox, but the latter may also be used to create and. CDF variables and datasets. NOAA's Pacific Marine Environmental Laboratory (PMEL) has developed the EPIC software package for oceanographic. EPIC provides graphical display and data field manipulation for multi- dimensional. CDF files (up to 4 dimensions). PMEL has been using this software on Unix and. VMS several years. At present, they have. I/O library ( epslib, which. CDF library). epslib allows transparent access to multiple data file formats. MATLAB Mex. EPS. interface for using any supported EPIC file with MATLAB. EPIC programs. for graphics and analysis of hydrographic profile data and time series data. This software was developed on Sun/Unix and is also supported for DEC/Ultrix and. VAX/VMS as a system for data management, display and analysis system for observational. The EPIC software includes over. WWW. The developers are interested in coordinating with others who may be developing. CDF files. The EPIC software is available. FTP from ftp. noaapmel. To. obtain the EPIC software, please see Web pages at http: //www. For information about EPIC, please see the Web pages at http: //www. Contact epic@pmel. Nancy Soreide, nns@noaapmel. Several packages are available for accessing net. CDF data from. Microsoft Excel. Excel, and a Scientific Dataset (SDS) Library that supports a. Data. Set. Editor add- in for Excel to view and modify various. CDF. A FORTRAN library called Ez. Get has been developed. PCMDI to facilitate retrieval. DRS, net. CDF, Gr. ADS, and, if a control file is supplied, GRIB. You can specify. how the data should be structured and whether it should undergo a grid transformation. The Ez. Get library comprises a set of subroutines that can be linked to any. FORTRAN program. Ez. Get reads files through the cdunif interface, but use. Ez. Get does not require familiarity with cdunif. The main advantages of using.
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