GNSS stands for Global Navigation Satellite System, and it refers to a system of satellites and ground-based receivers that are used to determine the location, speed, and time of an object on or near the Earth's surface. GNSS systems use signals from satellites to determine the position of a receiver, and they are used for a wide range of applications, including aviation, transportation, and scientific research.
There are several different GNSS systems in operation, including the Global Positioning System (GPS), which is operated by the United States, and the Global Navigation Satellite System (GLONASS), which is operated by Russia. Other GNSS systems include the European Union's Galileo system, China's BeiDou system, and India's NavIC system.
In the aerospace industry, GNSS systems are used for a variety of purposes, including navigation, positioning, and timing. For example, GNSS systems are used in aviation to help pilots navigate and to provide precise positioning information for aircraft. GNSS systems are also used in space exploration, to help spacecraft navigate and to perform scientific research.
Overall, GNSS systems are an important part of the aerospace industry, enabling the precise determination of location, speed, and time for a wide range of applications.