1. A method of determining an elevation of a tracked object, the method comprising: (a) identifying a set of latitude and longitude coordinates of the tracked object at a fixed reference point at a certain point in time; (b) identifying a reference elevation value corresponding to the set of latitude and longitude coordinates at the certain point in time; (c) measuring a first apparent altitude of the tracked object at the fixed reference point at the certain point in time; (d) comparing the first apparent altitude with the reference elevation value; (e) based at least in part upon a comparison of the first apparent altitude with the reference elevation value, determining a correction factor that can be applied to the first measured apparent altitude to adjust the first measured apparent altitude to be consistent with the reference elevation value; (f) measuring one or more additional apparent altitudes of the tracked object over a duration of time to obtain a set of measured altitude values; (g) storing the set of measured altitude values; and (h) adjusting one or more of the measured altitude values, based at least in part on the correction factor, to obtain a set of adjusted altitude values.