Here are some screenshots of the spectrum analyzer graphical user interface. Please note that the levels shown have not yet been tested with proper equipment. Proper tests and calibration will be done in the next hardware iteration.
Another sensor needed for higher accuracy during navigation and control was added to the IMU board. This sensor, a magnetometer, is responsible for measuring the orientation using the earth`s magnetic field. In a plane setup the current heading can be easily determined by making use of consecutive GPS measurements. This is because a plane is forced to move in a direction to stay in flight. On the other hand, a quadcopter does not need to move all the time and therefore needs a sensor that is able to measure its heading while hovering.
The compass is mounted to a I2C channel on the to of the IMU board as a small extra daughter board as seen in the following picture.
Running the mission planner command line interface some data was gathered to prove that the compass is functioning correctly.