angular acceleration data are combined in a vector form and stored on the on board flash memory 40 three axis of acceleration and three axes of angular acceleration results in six degrees of freedom 6of the processed sensor data is both stored on the flash 40 and transmitted in real time using a personal area network which can include bluetooth wi fi and other radio protocols providing truly untethered telemetry data fig2 shows an embodiment 200 of the modular sensor unit 250 observing motion from the point of reference of spring mass system in a classroom experiment in the analysis of a spring mass system 200 affixed to a reference point 230 the sensor unit 250 can be attached to the mass 210 at the end of the spring 220 as the mass oscillates up and down due to the pull of gravity the displacement 240 from floor 270 increases and decreases respectively the sensor unit 250 measures this distance using the waves 260 transmitted and reflected from the floor 270 and at the same time records and stores the linear and angular acceleration data for the user observing the experiment fig3 shows another embodiment of for a person to person situational awareness application 300 of using multiple modular sensor units 310 320 330 and more located at different location points of a moving body in front of a 2d two dimensional camera 340 on a support mount surface 345 take the case of an athlete 300 shadow performing in front of a wall 345 in some.