公开(公告)号：US20230336656A1

公开(公告)日：2023-10-19

申请号：US18338583

申请日：2023-06-21

Applicant: NextNav, LLC

Inventor： William ALBERTH, JR. ,  Michael DORMODY

IPC: H04M1/72454 ,  H04W4/029 ,  H04W4/16

CPC classification number: H04M1/72454 ,  H04W4/029 ,  H04W4/16 ,  H04M2250/02 ,  H04M2250/12

Abstract: Determining one or more heights of one or more mobile devices above surfaces. Particular embodiments described herein include machines that retrieve first data (e.g., measurement value(s) determined by sensor(s) of a mobile device or estimated position(s) of the mobile device), determine a location context based on the first data, identify second data (e.g., measurement value(s) determined by sensor(s) of the mobile device or status indicator value(s) of feature(s) of the mobile device) to retrieve for use in determining an estimated height above a surface at which the mobile device is located based on the determined location context, retrieve the second data, and determine an estimated height above a surface at which the mobile device is located based on the retrieved second data.

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.