Patent ID: 8401776
Filing Date: 2013-03-19
Classification: G08G

Abstract:
1. A method of using airport surveillance data to determine a location of a delay and an amount of time a vehicle is subjected to the delay during a movement of the vehicle between a first location and a second location, the method comprising: obtaining a time-ordered sequence of data points representing the movement of the vehicle, each data point including an (x) position coordinate and a (y) position coordinate, at a particular time represented by a time stamp; creating a speed vector (sv) including a plurality of elements, each of the elements corresponding to one of the data points from the time ordered sequence, wherein one of the elements is a ground speed element associated with the data point; determining the ground speed elements in the speed vector (sv) that are less than a predetermined ground speed threshold or are not a number; performing a spatial density test on each data point in a sequence of data points having ground speed elements that are less than the predetermined ground speed threshold, wherein the data point passes the spatial density test when a determined number of the data points within a predetermined range of a selected data point is greater than or equal to a predetermined threshold value; defining a starting index and a stopping index within the vector (sv) for each consecutive sequence of data points as a preliminary hold where each data point in the sequence has a ground speed element that is less than the predetermined speed threshold and passes the spatial density test; determining whether to merge each identified preliminary hold with an adjacent identified preliminary hold into a single preliminary hold; determining a time duration of each identified preliminary hold and eliminating any identified preliminary hold having a determined time duration of less than a predetermined time duration; and outputting and saving the identified preliminary holds onto a computer readable medium for at least one of review by an individual, production of a graphical display on a computer terminal, and production of a presentation document identifying the identified preliminary holds.