Wide area positioning system

摘要

Systems and methods for estimating a height of a mobile device are described. A reference pressure estimate is generated using atmospheric data from one or more reference locations. Various approaches for determining the reference pressure estimate are described. The reference pressure estimate is used, along with a pressure measurement at a position of a mobile device, to estimate the height of the mobile device.

主权项

1. A positioning system comprising at least one processor that:
determines a reference pressure estimate associated with a position of a mobile device, wherein the reference pressure estimate is based on reference data from one or more reference sensor units that are positioned at respective known locations; and determines an estimated elevation of the mobile device using the reference pressure estimate and atmospheric data collected by an atmospheric sensor of the mobile device, wherein the reference pressure estimate is generated based on a calculation using a first reference elevation pressure and a second reference elevation pressure, wherein the first reference elevation pressure is based on pressure and temperature measurements at a first location of a first reference sensor unit in addition to an elevation of the first reference sensor unit, and wherein the second reference elevation pressure is based on pressure and temperature measurements at a second location of a second reference sensor unit in addition to an elevation of the second reference sensor unit.