Machine and surveying applications aimed at boosting mine productivity and efficiency rely on accurate Real-time Kinematic (RTK) GPS positions. Accomplishing this typically requires tracking of a minimum of four satellites with good "geometry", a condition often not met in deep, open-pit mines.
GPS is a proven utility for determining positioning on the Earth's surface. However, in certain cases it requires augmentation in areas with obstructed views of the sky, such as near high walls in open pit mines and areas with overhead obstructions. A variety of technologies have been implemented to augment GPS, including the development of receivers that track GPS along with additional GNSS signals such as GLONASS, Galileo, and Compass, and the use of Terralite XPS technology, optical technology, inertial systems, laser augmented GPS and others . Open pit mining operations can enhance the continuity, efficiency and productivity of GPS applications by deploying the Terralite technology to have direct control of positioning coverage in their area.
Terralite XPS works by installing up a network of 4 or more Transmit Stations, or "Terralites," around the rim of the pit. Terralites broadcast a new positioning signal, called XPS, to mobile receivers mounted on machines.
These unique GPS+XPS receivers are capable of processing XYZ position data using a combination of GPS and Terralite signals. Terralite XPS can provide accurate data even with fewer than 4 satellites in view.
A complete Terralite XPS System consists of: