Estimating Floor Numbers and Floor Labels in a StructureA method involves selecting a set of altitude envelope distribution constraints for a building and generating a set of altitude envelope distributions for the building in accordance with the constrain…DRIVE·Jun 4·1 min readFollowG01C21/206NextNav, LLC
SYSTEMS AND METHODS FOR EXTENDING THE SPATIAL COVERAGE OF A REFERENCE PRESSURE NETWORKExtending the spatial coverage of a reference pressure network. Particular embodiments described herein include machines that initially determine that an estimated position of a mobile device resides …DRIVE·May 16·1 min readFollowG01C5/06NextNav, LLC
SYSTEMS AND METHODS FOR CALIBRATING UNSTABLE SENSORSCalibrating 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 measureme…DRIVE·Apr 11·1 min readFollowG01C17/38NextNav, LLC
SYSTEMS AND METHODS FOR CALIBRATING WEATHER STATIONS USING MAXIMUM ALLOWED ALTITUDE ERRORSCalibrating weather stations using maximum allowed altitude errors. Particular embodiments described herein include machines that determine a maximum allowed pressure calibration error for a weather s…DRIVE·Feb 29·1 min readFollowG01W1/18NextNav, LLC
Constraining Barometric Pressure Sensor Calibration with Sporadic Data CollectionMultiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on…DRIVE·Feb 22·1 min readFollowG01L27/002NextNav, LLC
Estimating Floor Numbers and Floor Labels in a StructureA method involves selecting a set of altitude envelope distribution constraints for a building and generating a set of altitude envelope distributions for the building in accordance with the constrain…DRIVE·Nov 30·1 min readFollowG01C5/06NextNav, LLC
Calibrating A Pressure SensorCalibrating a pressure sensor of a mobile device includes determining a first plurality of calibration values for a first plurality of visits to a first revisit zone to which a mobile device repeatedl…DRIVE·Nov 30·1 min readFollowG01C17/38NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING WHEN TO CALIBRATE A PRESSURE SENSOR OF A MOBILE DEVICEA method involves determining weighted metric values for each metric of a plurality of metrics by applying a weight for each metric to a determined value of each metric. The method further involves us…DRIVE·Oct 26·1 min readFollowG01L27/005NextNav, LLC
Device Based Barometric Pressure Sensor CalibrationDevice-based barometric pressure sensor calibration involves determining a specific location of the mobile device; determining a general location of the mobile device that encompasses and obfuscates t…DRIVE·Aug 31·1 min readFollowG01C25/00NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING CALIBRATION VALUES FOR ATMOSPHERIC SENSORS THAT PROVIDE MEASURED PRESSURES USED FOR ESTIMATING ALTITUDES OF MOBILE DEVICESDetermining calibration values for atmospheric sensors that provide measured pressures used for estimating altitudes of mobile devices. Particular systems and methods determine if any uncalibrated ref…DRIVE·Aug 24·1 min readFollowG01C5/06NextNav, LLC
IDENTIFYING ERRONEOUS CALIBRATION VALUES OF BAROMETRIC AIR PRESSURE SENSORA method involves identifying multiple calibration values and corresponding calibration confidence values of an initial calibration dataset in which one or more calibration values were derived using a…DRIVE·Jul 13·1 min readFollowG01C25/00NextNav, LLC
Constraining Barometric Pressure Sensor Calibration with Sporadic Data CollectionMultiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on…DRIVE·May 25·1 min readFollowG01L27/002NextNav, LLC
IDENTIFYING PROBLEMATIC 2D POSITIONS FROM MOBILE DEVICESA method to identify a problematic 2D position of a mobile device can include: determining a reported 2D position of the mobile device; determining a piece of information about the mobile device; and …DRIVE·May 4·1 min readFollowH04W4/029NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING WHEN AN ESTIMATED ALTITUDE OF A MOBILE DEVICE CAN BE USED FOR CALIBRATION OR LOCATION DETERMINATIONDetermining when an estimated altitude of a mobile device can be used for calibration or location determination. Particular systems and methods determine an area in which the mobile device is expected…DRIVE·Apr 20·1 min readFollowG01C5/00NextNav, LLC
SYSTEMS AND METHODS FOR PRESSURE-BASED ESTIMATION OF A MOBILE DEVICE ALTITUDE OR CALIBRATION OF A PRESSURE SENSORPressure-based estimation of a mobile device altitude or calibration of a pressure sensor involves machines that determine if a reference-level pressure value based on one or more measurements of pres…DRIVE·Apr 13·2 min readFollowG01C5/06NextNav, LLC
SYSTEMS AND METHODS FOR EXTENDING THE SPATIAL COVERAGE OF A REFERENCE PRESSURE NETWORKExtending the spatial coverage of a reference pressure network. Particular embodiments described herein include machines that initially determine that an estimated position of a mobile device resides …DRIVE·Jan 26·2 min readFollowG01C5/06NextNav, LLC
Barometric Pressure Sensor Calibration Based On Activity ContextA wholistic activity context is used to determine whether to calibrate a barometric pressure sensor of a mobile device. A pair of activity transitions are determined from three activities of the mobil…DRIVE·Jan 26·1 min readFollowG01C25/00NextNav, LLC
SYSTEMS AND METHODS FOR ESTIMATING A DIFFERENCE IN HEIGHT BETWEEN TWO FLOORS IN A BUILDING FOR USE IN ESTIMATING A HEIGHT OR AN ALTITUDE OF ONE OF THE TWO FLOORSEstimating a difference in height between floors in a building for use in estimating a height or an altitude of one of the floors. A height difference is estimated between a first floor and a second f…DRIVE·Jan 5·1 min readFollowG01C5/06NextNav, LLC
CHARACTERIZING HEIGHT ABOVE TERRAIN CONFIDENCEA method involves determining, at a mobile device or a service, an uncertainty in height above a reference altitude, an estimated 2D position of the mobile device, and an uncertainty in terrain height…DRIVE·Nov 24·1 min readFollowH04W4/025NextNav, LLC
Constraining Barometric Pressure Sensor Calibration with Sporadic Data CollectionMultiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on…DRIVE·Aug 4·1 min readFollowG01L27/002NextNav, LLC
SYSTEMS AND METHODS FOR EXTENDING THE SPATIAL COVERAGE OF A REFERENCE PRESSURE NETWORKExtending the spatial coverage of a reference pressure network. Particular embodiments described herein include machines that initially determine that an estimated position of a mobile device resides …DRIVE·May 19·2 min readFollowG01C5/06NextNav, LLC
Calibrating A Pressure SensorCalibrating a pressure sensor of a mobile device incudes determining an absolute calibration value used to calibrate pressure measurements by a pressure sensor of a mobile device; determining a first …DRIVE·May 5·1 min readFollowG01C17/38NextNav, LLC
FLOOR HEIGHT ESTIMATION AND CALIBRATION OF A MOBILE DEVICEMethods and machines involve detecting when a mobile device is in a first area and a second area at different times, collecting pressure data from the mobile device and reference sensor(s) to estimate…DRIVE·Apr 28·1 min readFollowG01C5/06NextNav, LLC
SYSTEMS AND METHODS FOR CALIBRATING UNSTABLE SENSORSCalibrating 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 measureme…DRIVE·Mar 31·1 min readFollowG01C17/38NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING WHICH REFERENCE-LEVEL PRESSURES ARE USED WHEN ESTIMATING AN ALTITUDE OF A MOBILE DEVICEDetermining which reference-level pressures, from among a plurality of available reference-level pressures, are used when estimating an altitude of a mobile device. Different systems and methods deter…DRIVE·Mar 17·1 min readFollowG01C5/06NextNav, LLC
Constraining Barometric Pressure Sensor Calibration with Sporadic Data CollectionMultiple calibration results for calibrating a barometric pressure sensor based on data received from a device containing the sensor are determined and stored in a table. The table is updated based on…DRIVE·Dec 16·1 min readFollowG01L27/002NextNav, LLC
CHARACTERIZING HEIGHT ABOVE TERRAIN CONFIDENCEA method involves determining, at a mobile device or a service, an uncertainty in height above a reference altitude, an estimated 2D position of the mobile device, and an uncertainty in terrain height…DRIVE·Dec 16·1 min readFollowH04W4/025NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING WHEN TO CALIBRATE A PRESSURE SENSOR OF A MOBILE DEVICEDetermining when to calibrate a pressure sensor of a mobile device. Particular systems and methods determine values of a plurality of metrics, determine weights for the metric values, determine weight…DRIVE·Nov 18·1 min readFollowG01L27/005NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING CALIBRATION VALUES FOR ATMOSPHERIC SENSORS THAT PROVIDE MEASURED PRESSURES USED FOR ESTIMATING ALTITUDES OF MOBILE DEVICESDetermining calibration values for atmospheric sensors that provide measured pressures used for estimating altitudes of mobile devices. Particular systems and methods determine if any uncalibrated ref…DRIVE·Jun 3·1 min readFollowG01C5/06NextNav, LLC
FLOOR HEIGHT ESTIMATION AND CALIBRATION OF A MOBILE DEVICEMethods and machines involve detecting when a mobile device is in a first area and a second area at different times, collecting pressure data from the mobile device and reference sensor(s) to estimate…DRIVE·May 27·1 min readFollowG01C5/06NextNav, LLC
SYSTEMS AND METHODS FOR DETERMINING A REFERENCE PRESSURE FOR USE IN ESTIMATING AN ALTITUDE OF A MOBILE DEVICEIdentifying and estimating values of atmospheric conditions for use in estimating an altitude of a mobile device. Systems and methods for monitoring one or more conditions before estimating an altitud…DRIVE·Sep 6·2 min readFollowG01C5/06NextNav, LLC
SYSTEMS AND METHODS FOR ESTIMATING AN ALTITUDE OF A MOBILE DEVICE BASED ON DETECTED TEMPERATURE CONDITIONSIdentifying and estimating values of atmospheric conditions for use in estimating an altitude of a mobile device. Systems and methods for monitoring one or more conditions before estimating an altitud…DRIVE·Sep 6·2 min readFollowG01C5/06NextNav, LLC
