which software application published by TICRA that has a feature/module/file called 'estec_add_on'? What is estec_add_on?

The software application published by TICRA that includes a feature or module called 'estec_add_on' is **GRASP**. The 'estec_add_on' is a specific component or extension within GRASP designed to enhance the software's capabilities, particularly for applications related to electromagnetic simulations, antenna design, and analysis. The 'estec_add_on' typically facilitates the modeling and analysis of complex antenna systems, incorporating features that may be useful for users engaged in European Space Research activities or similar applications. For precise details about the functionalities and usage of 'estec_add_on', it's advisable to refer to TICRA’s official documentation or user manuals associated with GRASP.