GRASP: How to apply external feed data to the analysis

This video explains and illustrates how to use realistic feed data in reflector antenna analysis in GRASP. Such realistic feed data could come from measurements of an antenna feed or from simulation of a feed model. Table of contents: 00:00: Introduction to video 00:39: Introduction to ideal and realistic feeds in GRASP 01:24: Dual-offset reflector antenna wizard geometry and radiation pattern 01:55: Setup of realistic feed, Tabulated Pattern 02:28: Replace ideal feed with realistic feed 02:48: Antenna radiation pattern with realistic feed, before feed normalisation 03:03: Realistic feed normalisation 03:32: Antenna radiation pattern with realistic feed, after feed normalisation 03:45: Realistic feed phase centre analysis and feed position adjustment 05:56: Antenna radiation pattern with realistic feed, after feed normalisation and feed position adjustment 06:14: Realistic feed, number of modes included and minimum sphere 08:50: Setup of realistic feed, Tabulated SWE Coefficients (SWE = Spherical Wave Expansion) 09:28: Update commands to use Tabulated SWE Coefficients as feed 10:21: Antenna radiation pattern with realistic feed, Tabulated SWE Coefficients