I wrote a blog about installing libRadtran in the virtual machine ubantu environment before, but recently I found that using a virtual machine to run libRadtran consumes too much computer resources when doing experiments. When doing large-scale parallel computing, the speed will be very slow, so Transferred libRadtran to WSL, this blog also talks about how to install libRadtran in WSL.

The main contents of this blog include:

1.WSL environment configuration
2. The installation and basic use of libRadtran

1. Configuration of WSL environment

WSL is the linux system of windows. The following mainly introduces how to install WSL:

The official configuration tutorial can refer to this link: https://learn.microsoft.com/zh-cn/windows/wsl/setup/environment

1. Open Control Panel -> Programs, turn on Windows Features (enable or disable Windows feature options)

2. Open cmd in administrator mode and check whether wsl has been installed (use wsl -l -v command)

Because I have installed ubantu's wsl environment, there is output. If it is not installed, the following window will appear:

3. To install wsl, we can download and install directly through the Microsoft store, search for ubantu, and then choose the version you want to install (version 20.04.5 is recommended, the latest version 22 is not recommended, and there are still many bugs)

Opening after downloading will load the data

Open it after installation, we will be asked to enter a new user name and password to create a user, the password is invisible after entering, and then it looks like the picture below

You can also set the mirror source of wsl. Readers who are interested can find relevant information by themselves, so I won’t introduce it here

4. Configure the development environment of vscode+wsl

First, let's go to the vscode official website to download and install vscode:

Official website link: https://code.visualstudio.com/

After downloading and installing, just keep next without thinking. Of course, this is without modifying the installation path. If you need to customize the installation path, remember to modify it during the installation process.

Then we open vscode and download the WSL plugin:

Finally, we open the ubantu terminal and enter code .

If ubantu appears in the lower left corner, it means that we are linked to the linux subsystem of ubantu

2. Install libRadtran

The installation process is basically the same as my last tweet. This time I will briefly introduce the process without going into details.

First, you need to download all the installation packages needed to install libRadtran:

The installation mainly needs to install make,gcc,gfortran, etc., among which make,gcc,gfortran, etc. can be installed using the sudo apt-get install xxx command, and GSL,zlib,hdf5,curl,netcdf-c,netcdf need to be installed manually -fortran and libRadtran, the protagonist of this tweet.

**The following is an installation introduction in two parts:

1. The part of using apt to install

2. Manual installation part **

Do you think it will be installed directly later, of course not, first we need to modify the python version of wsl, because the default Python version of ubantu20 version is python3, but the python code of libRadtran uses python2 version, For specific switching steps, please refer to this blog:

https://blog.csdn.net/My_CSDN_IT/article/details/114323834

1. The part of using apt to install

Here are the installation commands for all parts that can be installed using apt:

sudo apt-get install make
sudo apt install build-essential
sudo apt-get install gfortran
sudo apt-get install flex bison
sudo apt install perl

2. The part of manual installation

The commands for manual installation in the following content are all entered in the terminal of wsl-ubantu

Before starting the installation, you need to make sure Installation location, my installation location is /opt/netcdf, use mkdir /opt/netcdf to create a folder (you can modify it according to your needs)

1. First install GSL: . GSL download address

installation steps:

Enter gsl The directory where it is located is decompressed: tar –xvf gsl-2.7.tar.gz
 Enter the decompressed directory: cd gsl-2.7
 Start compiling:./configure --prefix=/opt/netcdf(This is the folder created above, which can be modified according to the actual situation, and the following software installation path is also the same)
make
make install

1. Install zlib: zlib Home Site

installation method:

Enter zlib The directory where it is located is decompressed: tar –xvf zlib-1.2.11.tar.gz
 Enter the decompressed directory: cd zlib-1.2.11
 Start compiling:./configure --prefix=/opt/netcdf
make
make install

1. Install hdf5:. Download HDF5® - The HDF Group

installation method:

tar -xvf hdf5-1.10.1.tar.gz
cd hdf5-1.10.1
./configure --with-zlib=/opt/netcdf --prefix=/opt/netcdf
make
make install

1. Install curl:. curl - Download

installation method:

tar -xvf curl-7.55.1.tar.gz
cd curl-7.55.1
./configure --with-zlib=/opt/netcdf --prefix=/opt/netcdf
make
make install

Below we are about to install netcdf-c and netcdf-fortran, but before installing these two, it is best to set the environment variables first, the setting method is as follows:

First set the system environment variable: vim ~/.bashrc
 Move the cursor to the last line and insert the following environment variables:
export NETCDF=/opt/netcdf(This is the installation path created earlier)
export PATH=${NETCDF}/bin:$PATH
export LD_LIBRARY_PATH=${NETCDF}/lib:${LD_LIBRARY_PATH}
export LD_RUN_PATH=${NETCDF}/lib:${LD_RUN_PATH}
export CPPFLAGS=-I/opt/netcdf/include
export LDFLAGS=-L/opt/netcdf/lib
 After copying and pasting, press<ESC>key to exit editing, enter ": wq"exit save;
source ~/.bashrc Make the environment variable take effect.

1. Install netcdf-c:. NetCDF

installation steps:

tar -xvf netcdf-c-4.8.0.tar.gz
cd netcdf-c-4.8.0
./configure --prefix=/opt/netcdf 
##If the above compilation command reports an error, it can be replaced with the following command
##./configure --prefix=/opt/netcdf LDFLAGS=-L/opt/netcdf/lib CPPFLAGS=-I/opt/netcdf/include
make
make install

1. Install netcdf-fortran:. NetCDF-fortran

installation method:

tar -xvf netcdf-fortran-4.5.3.tar.gz
cd netcdf-fortran-4.5.3
./configure --prefix=/opt/netcdf
##If the above compilation command reports an error, it can be replaced with the following command
##./configure --prefix=/opt/netcdf LDFLAGS=-L/opt/netcdf/lib CPPFLAGS=-I/opt/netcdf/include
make
make install

1. Install libRadtran

Find a location, create a new folder named libradtran2.0.4 (folder name can be specified by yourself) (command line: mkdir ibradtran2.0.4), and then install the software to this directory

installation steps:

1,Unzip: tar -xvf libradtran-2.0.4.tar.gz
2,Compile and install:
cd libRadtran-2.0.1
./configure --prefix=/opt/libradtran2.0.1
make
make install
 Check if the installation is complete: make check

Finally, for the convenience of operation, we set some environment variables under individual users:

Open the environment variables of ordinary users: vim ~/.bashrc (note that .bashrc is a hidden file, if you want to view this file, you can use "`ls –

a` View") In the last line of .bashrc, add the following lines of settings:

export LIBRAD=/opt/libradtran2.0.4(This can be changed to the reader himself libRadtran installation path, be sure to pay attention to the case of the file name)
export DATA=${LIBRAD}/share/libRadtran/data 
export INP=${LIBRAD}/share/libRadtran/examples 
export PATH=${LIBRAD}/bin:$PATH 
export LD_LIBRARY_PATH=${LIBRAD}/lib:${LD_LIBRARY_PATH} 
export LD_RUN_PATH=${LIBRAD}/lib:${LD_RUN_PATH}

Exit and save, source ~/.bashrc to make the environment change take effect.

At this point, the installation of libRadtran in wsl is complete. Now we can use the terminal of wsl to enter code . to open vscode to write and process related files.

We can view the sample file of libRadtran in libRadtran2.0.4 as shown in the figure below, and we can also write the INP file

If you want to run the INP file, switch to the libRadtran-2.0.4/examples path, and then enter uvspec <xxx.INP> xxx.out in the wsl terminal.

So far, the content of this blog post has been introduced. If you have any questions, you can communicate with private messages. The software can be obtained by replying to [libradtran] in the background of the official account [Programmer’s Additional Issue Log].