Abstract: A navigation system includes a computer readable storage medium having a sequence of instructions stored thereon, which, when executed by a processor, causes the processor to acquire a plurality of parameters of a train comprising parameters measured after the train has begun a journey. The train includes a plurality of vehicles providing tractive effort and a consist coupled to the plurality of vehicles. The sequence of instructions also causes the processor to calculate the tractive effort of less than all of the plurality of vehicles based on the acquired plurality of parameters.

Abstract: A computer readable storage medium has a sequence of instructions stored thereon, which, when executed by a processor, causes the processor to acquire a plurality of actual train speed measurements from at least one sensor during a journey and acquire a train power parameter corresponding to each of the plurality of actual train speed measurements. The sequence of instructions further causes the processor to estimate a plurality of resistance parameters from the plurality of actual train speed measurements and the corresponding train power parameters.

Abstract: A system and method for determining and managing a slack state of a train and for is disclosed. The system acquires railway system parameters for a plurality of railway vehicles and for a track segment traversed by the plurality of railway vehicles, the parameters including a grade of the track segment at each of a plurality of locations therealong and an acceleration of each of the plurality of railway vehicles at each of the plurality of locations. The system calculates a coupler force for each of the plurality of railway vehicles at each of the plurality of locations based on the railway system parameters, determines a slack state for the plurality of railway vehicles based on the calculated coupler forces, and determines a limit on a tractive effort generated by locomotive consists included in the railway vehicles based on the determined slack state.

Abstract: A computer readable storage medium has a sequence of instructions stored thereon, which, when executed by a processor, causes the processor to acquire a plurality of actual train speed measurements from at least one sensor during a journey and acquire a train power parameter corresponding to each of the plurality of actual train speed measurements. The sequence of instructions further causes the processor to estimate a plurality of resistance parameters from the plurality of actual train speed measurements and the corresponding train power parameters.

Abstract: A navigation system includes a computer readable storage medium having a sequence of instructions stored thereon, which, when executed by a processor, causes the processor to acquire a plurality of parameters of a train comprising parameters measured after the train has begun a journey. The train includes a plurality of vehicles providing tractive effort and a consist coupled to the plurality of vehicles. The sequence of instructions also causes the processor to calculate the tractive effort of less than all of the plurality of vehicles based on the acquired plurality of parameters.