cassbeam software package provides Cassegrain antenna modelling, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install cassbeam
cassbeam is installed in your system.
Make ensure the cassbeam package were installed using the commands given below,
$ sudo dpkg-query -l | grep cassbeam *
You will get with cassbeam package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | cassbeam |
| Version | 1.1-1 |
| Description | Cassegrain antenna modelling |
| Sub Section | Science |