公开(公告)号：US20220099444A1

公开(公告)日：2022-03-31

申请号：US17644029

申请日：2021-12-13

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Ganesh PATTABIRAMAN ,  Abijith KUMAR ,  Thomas WOLF ,  Gary PARSONS ,  Christian GATES ,  Deepak JOSEPH ,  Badrinath NAGARAJAN

IPC: G01C17/38 ,  G01C25/00 ,  G01C5/06 ,  G01S5/02 ,  G01C21/16 ,  G01S19/14 ,  G01C21/10

Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

公开(公告)号：US20170363423A1

公开(公告)日：2017-12-21

申请号：US15692142

申请日：2017-08-31

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Ganesh PATTABIRAMAN ,  Abijith KUMAR ,  Thomas WOLF ,  Gary PARSONS ,  Christian GATES ,  Deepak JOSEPH ,  Badrinath NAGARAJAN

IPC: G01C17/38 ,  G01C25/00 ,  G01C21/10

CPC classification number: G01C17/38 ,  G01C5/06 ,  G01C21/10 ,  G01C21/165 ,  G01C25/00 ,  G01C25/005 ,  G01S5/02 ,  G01S19/14 ,  G01S19/40

Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

公开(公告)号：US20240118081A1

公开(公告)日：2024-04-11

申请号：US18539991

申请日：2023-12-14

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Ganesh PATTABIRAMAN ,  Abijith KUMAR ,  Thomas WOLF ,  Gary PARSONS ,  Christian GATES ,  Deepak JOSEPH ,  Badrinath NAGARAJAN

IPC: G01C17/38 ,  G01C5/06 ,  G01C21/10 ,  G01C21/16 ,  G01C25/00 ,  G01S19/14

CPC classification number: G01C17/38 ,  G01C5/06 ,  G01C21/10 ,  G01C21/165 ,  G01C25/00 ,  G01C25/005 ,  G01S19/14 ,  G01S5/02

Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.

公开(公告)号：US20190317179A1

公开(公告)日：2019-10-17

申请号：US16456200

申请日：2019-06-28

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Thomas WOLF

IPC: G01S5/02 ,  G01C5/06 ,  G01S19/45

Abstract: Using atmospheric data from one or more reference nodes to estimate an altitude of a receiver. Assistance data associated with a set of reference nodes within a region is identified, and the assistance data is used to identify atmospheric reference data associated with a subset of selected reference nodes. An estimate of the receiver's altitude is generated using the atmospheric reference data from the subset of reference nodes.

公开(公告)号：US20190226842A1

公开(公告)日：2019-07-25

申请号：US16372638

申请日：2019-04-02

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Thomas WOLF ,  Arun RAGHUPATHY ,  Andrew SENDONARIS

IPC: G01C5/06 ,  H04W64/00

CPC classification number: G01C5/06 ,  H04W64/00

Abstract: Improving an estimated altitude of a receiver by mitigating the effects of transmitter heating. Systems and methods for improving estimates of a receiver's altitude determine a reference pressure at a reference altitude using a temperature measured at a transmitter or another temperature value, an altitude of the transmitter, and a pressure measured by the transmitter or another pressure value. A local reference pressure for a receiver is determined using the reference pressure and other reference pressures from other transmitters. Reference pressures from overheating transmitters may be weighted less than reference pressures from other transmitters when determining the local reference pressure. The local reference pressure is then used to estimate the altitude of the receiver.

公开(公告)号：US20170195984A1

公开(公告)日：2017-07-06

申请号：US15466704

申请日：2017-03-22

Applicant: NextNav, LLC

Inventor： Michael DORMODY ,  Thomas WOLF ,  Arun RAGHUPATHY ,  Andrew SENDONARIS

IPC: H04W64/00 ,  G01C5/06

CPC classification number: H04W64/00 ,  G01C5/06

Abstract: Improving an estimated altitude of a receiver by mitigating the effects of transmitter heating. Systems and methods for improving estimates of a receiver's altitude determine a reference pressure at a reference altitude using a temperature measured at a transmitter or another temperature value, an altitude of the transmitter, and a pressure measured by the transmitter or another pressure value. A local reference pressure for a receiver is determined using the reference pressure and other reference pressures from other transmitters. Reference pressures from overheating transmitters may be weighted less than reference pressures from other transmitters when determining the local reference pressure. The local reference pressure is then used to estimate the altitude of the receiver.