This project walks you through the steps to download and install a program to analyze rocket data collected from flying a SensorTag on a model rocket. You’ll find out the G forces on the rocket, how fast it went, how high it went, and see the rotation and air pressure during the flight.
Here’s a link to the Maker project to built the ST-2 rocket that carried the iPhone in the movie. Build this rocket to collect your own data to analyze following the steps in this project.
You don’t need to know how to program to follow this project. You get the complete source code, though, so if you do know a little programming, you can tinker with the analysis program to learn even more.
The raw data will have a lot of extraneous information, as well as some valuable calibration information.
Find the start and end of the rocket flight. Enter the times in the Flight time fields. The plot will expand to show just the rocket flight.
Improve the accuracy by calibrating the device.
Sitting on the pad, the accelerometer should measure 1G.
Select about 10 seconds of data before the launch. Enter the times in the Calibration time fields to mathematically calibrate the sensor to 1G.
There's a story behind the data, as well as some important caveats about errors. See the Rocket Data Analysis portion of this blog if you would like to learn more about how the calculations are done and how reliable they are.
See this blog if you would like to learn more about creating user interfaces in techBASIC. This is what you need to know to modify the controls you see in the program.
See this blog to learn more about using plots and graphics in techBASIC. This tells you how to change and create plots like the five used in this program.
See this blog to explore how data is actually collected from Bluetooth low energy devices like the Texas Instruments SensorTag.