The third edition of online Course on Satellite Communication & Satellite Navigation: Technologies & Applications was conducted at NESAC during October 09-13, 2023. A total of 55 participants registered for the course mainly from NITs and other Engineering Colleges. A total of 13 lectures were delivered by Scientists of SUD, NESAC as well as thematic experts from Space Applications Centre (SAC), Ahmedabad, Satcom Program Office (SATCOM PO), ISRO HQ and Industry Experts. The course covered topics like basics of Satellite Communication & Navigation, Ground Station, RF, Baseband technologies, and applications of SATCOM & SATNAV with special emphasis to High Throughput Satellites (HTS) for Internet Services, Mobile Satellite Services (MSS) applications for Disaster Management & NaVIC Applications. The Course was inaugurated by Shri H. Rayappa, Director, SATCOM PO, ISRO HQ. Sri Anjan Debnath, SUD, NESAC acted as the Course Officer while Sri Ramani K. Das, Head, SUD, NESAC was the Course Director for the Course.