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| faq [2011/11/25 07:48] – arve | faq [2024/12/22 23:58] (current) – [How to convert to the new syntax?] admin |
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| There are several sources that describe the inner workings of DISORT. Please check out: | There are several sources that describe the inner workings of DISORT. Please check out: |
| * [[ftp://climate1.gsfc.nasa.gov/wiscombe/Multiple_Scatt/DISORTpaper.pdf|The DISORT paper]] for a brief description. | * [[https://www.osapublishing.org/ao/abstract.cfm?uri=ao-27-12-2502|The DISORT paper]] for a brief description. |
| * [[ftp://climate1.gsfc.nasa.gov/wiscombe/Multiple_Scatt/DISORTReport1.1.pdf|The DISORT report]] for a detailed description. Highly recommended. | * {{::disortreport1.1.pdf|The DISORT report}} for a detailed description. Highly recommended. |
| * [[ftp://climate1.gsfc.nasa.gov/wiscombe/Multiple_Scatt/DISORT2.0beta/DISORT.doc|The DISORT IO documentation]] for a description of all input/output to DISORT. | * {{::disort2.doc|The DISORT 2.0 IO documentation}} for a description of all input/output to DISORT. |
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| ==== Where is the tools directory? ==== | |
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| The directory structure has changed a bit from version 1.3 to version 1.4. We made libRadtran a bit more compliant to the "standard" source code structure. All the sources are now in src, the library sources in libsrc_c and libsrc_f, and the binaries go into bin. While this is not a big improvement in itself, one may now use "make install" as with most other UNIX/Linux tools. | |
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| ==== How to redirect uvspec output ==== | ==== How to redirect uvspec output ==== |
| before calling configure. | before calling configure. |
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| ==== I have problems compiling libRadtran under Mac OS X ==== | ==== I have problems compiling libRadtran under MacOS ==== |
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| To be able to build the libRadtran C and Fortran libraries and associated | Please be assured that libRadtran works nicely under MacOS since some of the developers work on a Mac. To be able to build the libRadtran C and Fortran libraries and associated |
| tools, XCODE from apple is first needed. It either is included with | tools, you will need a number of packages provided by either |
| your computer on a DVD or you may get it from | [[https://www.macports.org|macports]] or [[https://brew.sh/index_de|Homebrew]]. Both build upon the Apple developer tools Xcode, available in the App Store. Please note that Xcode is not sufficient because it does not provide a Fortran compiler. |
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| http://developer.apple.com/tools/xcode/ | E.g. for macports that implies that you install the GNU C compiler, |
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| The gcc that comes with xcode will not compile libRadtran. Thus, please install | |
| gcc and gfortran from http://www.macports.org using the port command (you have to install the port command first) in a terminal window: | |
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| sudo port install gcc | sudo port install gcc |
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| Also add the following lines to your .profile file and remember to "source .profile" afterwards. | and a number of other packages like the GNU Scientific Library |
| | (libgsl), the GNU Multiple Precision Library (libgmp), and the NetCDF library |
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| export LDFLAGS="-L/opt/local/lib -L/usr/X11/lib" | sudo port install gsl |
| export CPPFLAGS="-I/opt/local/include -I/usr/X11/include" | sudo port install gmp |
| export PATH=/opt/local/bin:/opt/local/sbin:$PATH | sudo port install netcdf |
| | ... |
| |
| The rest is easy. Open a terminal under Max OS X and following the | The rest is easy. Open a terminal under Max OS X and follow the standard libRadtran installation instructions. |
| standard libRadtran instructions in the README file. | |
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| BUT THAT IS NOT ALL! | |
| |
| Alas, two things will be missing with the above installation procedure. Thus | |
| not all functionality is included. To get the rest you need the gnu scientific library | |
| (libgsl), the gnu multiple precision library (libgmp), and the (NETCDF) | |
| Network Common Data Form) library | |
| |
| Get these also from http://www.macports.org and install with: | |
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| sudo port install gsl | |
| sudo port install gmp | |
| sudo port install netcdf | |
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| ==== How to implement loops in libRadtran ==== | ==== How to implement loops in libRadtran ==== |
| |
| for sza in 0 15 30 45; do | for sza in 0 15 30 45; do |
| sed s/SZA/$sza/ uvspec.template uvspec.template > uvspec.inp | sed s/SZA/$sza/ uvspec.template > uvspec.inp |
| ../bin/uvspec < uvspec.inp >> uvspec.out | ../bin/uvspec < uvspec.inp >> uvspec.out |
| done | done |
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| See [[http://www.libradtran.org/doku.php?id=user_area:netcdf_under_cygwin|here]]! | See [[http://www.libradtran.org/doku.php?id=user_area:netcdf_under_cygwin|here]]! |
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| | |
| | ==== User defined aerosol ==== |
| | |
| | The most general method to setup your own aerosol (or cloud) properties is the following: |
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| | profile_file aer1 1D your_aerosol1.dat |
| | profile_properties aer1 your_aerosol1.cdf interpolate |
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| | profile_file aer2 1D your_aerosol2.dat |
| | profile_properties aer2 your_aerosol2.cdf interpolate |
| | |
| | ... |
| | |
| | This way you may combine as many aerosol species as you need. The profile_file includes mass concentration altitude profiles and particle size. The netcdf profile_properties_files include the aerosol optical properties (extinction, single scattering albedo, phase matrix, Legendre polynomials of phase matrix ... ) and can be generated using e.g. the Mie tool in libRadtran, where you can specify refractive index and size distribution parameters (see examples/MIE_2.INP). Run |
| | bin/mie < examples/MIE_2.INP |
| | and you may use the output wc.mie.cdf as example for an optical properties file. |
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