Analysis
There are 3 separate errors attributed to the sensors themselves that can cause an effect called drift. They are: sensor bias, a constant offset of the recorded motion compared to the actual experienced motion; scale factor error, which is the same as sensor bias except that it is a percentage of the actual experienced motion being added or subtracted from the measurements; and noise, a constant, small rapid fluctuation of the recorded motion, even when it is not moving. The results came as we expected. Immediately noticeable, a strong sensor bias was apparent, but was easily removed due to the short run and the fact that it was constant. In our original runs, with sensor bias included, it was so strong that the the final location measured out to be 60 meters below the ground. Even with that sensor bias removed, a small negative scale factor error is apparent that led to it travelling 2 meters into the ground after 70 seconds. Sensor noise was near negligible due to the fact that it was not constant.