Corrections for delays in service improving positioning accuracy in Transport

High Accuracy Assistance Service (HAAS) is a high-precision, cloud-based corrections service. It contains highly accurate corrections for orbits, clocks, ionospheric and tropospheric delays. These corrections are delivered over terrestrial means via the same high availability infrastructure already supporting over a billion devices each day. The use of HAAS will enable horizontal position accuracy of ~50 cm with code phase-based positioning and ~20 cm with carrier phase-based positioning on receivers with external antenna in open sky conditions.