user subsystem
3.User interface subsystem and Application specification subsystem are important part of ARTs-EDB.In this system, user interface subsystem is in charge of receiving user command and displaying the result information, and application specification subsystem is an advanced language interface which is responsible for dealing with database application.
8.Data capture and down sample subsystem realizes the sampling of ocean bottom magnetotelluric signal at different sample frequency according to user input parameter, and realizes real time anti alias filter and down sample based on user input sample frequency when user set frequency is lower than the lowest sample frequency of hardware of instrument.

