Fig.1 SSM GUISSM is a plugin component that allows an AP developer to provide his/her application software with the capability to replay multiple historical tracks created in a tracking application. Technically, it is an example of an "auxiliary client" of the SDM. An auxiliary client is a "pure" client of the SDM, i.e. it cannot expose methods through which the SDM can "talk back". This is a privilege reserved for the application client alone. (Recall that an application client can expose certain standard methods, to which the API can send messages, provided that the application client has registered itself with the SDM, via the initSvc method.) Each auxiliary client "talks" to the SDM through a private, specialized API, designed for that client alone.
SSM will allow users to choose multiple tracks, the beginning and end times for replay, and the replay speed with respect to the clock time. A friendly GUI is shown in Fig. 1
Fig.1 SSM GUI