1. An engine system, comprising: an engine; a sensor configured to generate a sensor signal indicative of a power generated by the engine; a speed sensor configured to generate a speed signal indicative of a speed of the engine; and a controller configured to: receive the sensor signal and the speed signal; generate an operating histogram based on the sensor signal and the speed signal; receive modal points for the engine, the modal points having associated emissions limits, each modal point including the speed of the engine and an amount of output power of the engine corresponding to the speed; assign weights to the modal points based on the operating histogram; generate a calibration parameter set for the operating histogram based on the weights; and apply the calibration parameter set to the engine.