公开(公告)号：US20230161074A1

公开(公告)日：2023-05-25

申请号：US18157428

申请日：2023-01-20

Applicant: NextNav, LLC

Inventor： Cristina SEIBERT ,  Jerome VOGEDES ,  William ALBERTH

IPC: G01W1/10 ,  H04W4/029 ,  G01S5/00 ,  G01S5/02 ,  G01W1/06 ,  H04H60/71 ,  H04W4/02

CPC classification number: G01W1/10 ,  H04W4/029 ,  G01S5/0063 ,  G01S5/0284 ,  G01W1/06 ,  H04H60/71 ,  H04W4/025

Abstract: Determining, broadcasting and using reference pressure data in a network of transmitters. Particular embodiments described herein include machines that select atmospheric data from weather stations within a transmitter network, use the selected atmospheric data to determine a reference atmospheric value, and transmit the reference atmospheric value from a transmitter to a mobile device for use in estimating an altitude of the mobile device. The atmospheric data may include any of reference pressures form the weather stations, measured temperatures from the weather stations, or reference temperatures from the weather stations. The reference atmospheric value may include a reference pressure value of a reference altitude, or a reference temperature value.

公开(公告)号：US20230228566A1

公开(公告)日：2023-07-20

申请号：US18174986

申请日：2023-02-27

Applicant: NextNav, LLC

Inventor： Jerome VOGEDES ,  William ALBERTH, JR.

IPC: G01C5/06 ,  G01N33/00

CPC classification number: G01C5/06 ,  G01N33/004

Abstract: Determining when a barometric-based approach for estimating an unknown altitude of a mobile device should not be used. Different approaches determine if estimating an unknown altitude of a mobile device using a measured atmospheric condition will result in an estimated altitude having acceptable or unacceptable error. If use of the measured atmospheric condition would result in acceptable error, the measured atmospheric condition is used to estimate the unknown altitude. If use of the measured atmospheric condition would result in unacceptable error, the measured atmospheric condition is not used to estimate the unknown altitude. The resultant altitude estimate is then used to locate the mobile device.