Install astro-gdl by entering the following commands in the terminal:
sudo apt update sudo apt install astro-gdl
IDL/GDL packages for astronomy
GDL (GNU Data Language) is a free replacement for the commercial software IDL (Interactive Data Language). It has full syntax compatibility with IDL 7.1 and is usable for astronomical data analysis. This metapackage will install astronomy related packages usable with GDL; especially the IDL Astronomy Users Library.