We recorded usable temperature, altitude, pressure, and accelerometer data from the flight until the Raspberry Pi stopped receiving power. During the first flight, the sensors threw an error during the program and the Pi did not record data. For the second flight, we updated the program with more “try except” functionality that prevented the errors from ending the program.
The temperature vs. altitude graph demonstrates a decrease in temperature up to around midway through the flight and a gradual increase in temperature. Yet, in comparing our data to previously recorded temperature tables, our temperature at maximum altitude is far above the actual readings. One source of error may have been exposing the BMP 180 to low temperatures.
The pressure vs. altitude data is far more uniform and falls on the expected exponential function. Apart from a small number of erroneous readings, the data les along the expected curve.
We also graphed accelerometer X, Y, and Z against the time (measured in number of readings) during the flight. One initially discernable feature from the graph is the shift from negative to positive acceleration on the Z axis. As the accelerometer was mounted upside down, this moment was likely when the balloon popped and began to fall.
Following the launches, we compiled the GoPro videos (approximately 90 GB in total) into various 30 second trailers and a longer five minute video about the project. The longer video includes details regarding the balloon’s trip, including altitude, speed, and time at periodic intervals.