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.