The Boeing Company

Theboeing Company

Reece Alexander Clothier

Brendan Patrick Williams

Neale Leslie Fulton

Sarah Anne Mecklem

Grace Shanti Garden

Solene Gabrielle Doreen Hegarty-Cremer

A rough initial estimate of Line of Sight range ('pseudo-range') is generated essentially immediately following the detection of an object by a passive sensor on a vehicle. The data are combined with prior detection likelihood and prior performance models for the sensor. These comparisons generate a posterior probability distribution of pseudo-range estimates. A pseudo-range estimate is derived from the probability distribution and output for use in detect and avoid decision-making and action planning. The pseudo-range estimate can be updated to improve its accuracy, such as by using a recursive filter (e.g., a Kalman filter). Other information, such as current atmospheric data, or known (or likely) vehicular activity in the region and at the current time, can be used in addition to the vehicle's spatial and temporal location, to improve accuracy.

Pseudo-range estimation from a passive sensor

A method includes determining data indicating velocity uncertainty, relative position uncertainty, or both, associated with an aircraft and a navigation hazard. The method also includes determining a set of bounding vectors based on the data and determining a plurality of candidate intersection points that together correspond to circular or spherical regions defined by the set of bounding vectors. The method also includes identifying a region of interest based on a projected intersection of the aircraft or the navigation hazard with a candidate intersection point and generating a situational awareness display based on the region of interest.

Aircraft flight information system and method

A method of generating an aircraft display includes determining an estimated first flight path of a first aircraft and determining an estimated second flight path of a second aircraft. The method also includes determining an estimated proximity of the first aircraft and the second aircraft based on the estimated flight paths. The method further includes, based on the estimated proximity indicating a projected separation violation condition, determining a navigation alert region. The method also includes generating a display that includes a map, a first graphical feature overlaying the map and representing of the first aircraft, a second graphical feature overlaying the map and representing of the second aircraft, and a third graphical feature overlaying the map and indicating dimensions of the navigation alert region.

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Melbourne, Australia

Reece Alexander Clothier