Global Positioning Systems: Over Land and Under Sea

Abstract

Introduction Imagine with me a pre-COVID world. We are at an Acoustical Society of America (ASA) meeting in, say, Chicago, IL. We’ve just enjoyed a stimulating afternoon session, and our brains are fried. We need to find a coffee shop for a chat and some caffeine. What’s the first thing we do? We quickly pull out our mobile phones and open a Yelp or Google Maps app to find a location within a five-minute walk of the conference venue with a fouror five-star review, and we are on our way, following turnby-turn directions until we reach the destination. This mapping solution is delivered courtesy of a Global Navigation Satellite System (GNSS).