26-246 Integrity of GNSS satellite orbit and clock products

Mission

High precision positioning using Global Navigation Satellite Systems relies on techniques such as Precise Point Positioning or Real Time Kinematic. In order to achieve accuracies and precisions at the centimeter level, these techniques require the use of precise products: GNSS satellite orbits and clocks, as well as satellite hardware biases and in some cases atmospheric products. In addition to the accuracy of such products, new applications of real-time PP such as autonomous driving systems require the integrity of the solution to be assured. The integrity is the trust that can be placed in the solution and includes the ability to detect gross errors which could compromise safety. 

The integrity of such PPP solutions depends upon the integrity of the products employed, that is the confidence in the solution depends upon the confidence of the input data, including the precise PPP products available from various providers (both organizational IGS...