Wide area positioning system

摘要

Systems and methods compute an estimated altitude of a receiver using atmospheric data, including a pressure measured at a location of the receiver, a temperature measured by at a reference location, and a reference pressure corresponding to the reference location. The reference pressure is based on a pressure measured at the reference location, the temperature measured at the reference location, and an altitude corresponding to the reference location. The receiver receives the reference pressure from a transmitter. The estimated altitude may be used for determining the three-dimensional position of the receiver.

主权项

1. A method for estimating an altitude of a mobile device, the method comprising:
computing an estimated altitude of a mobile device using a pressure measured at a location of the mobile device, a temperature measured at a reference location, and a reference pressure received from a transmitter, wherein the reference pressure is based on a pressure measured at the reference location, the temperature measured at the reference location, and an altitude corresponding to the reference location; and computing another estimated altitude of the mobile device using another pressure measured at another location of the mobile device, another temperature measured at the reference location, and another reference pressure, wherein the other reference pressure is based on another pressure measured at the reference location, the other temperature measured at the reference location, and the altitude corresponding to the reference location.