<- Back to Tools

Apogee Estimator

Estimate the highest point that your rocket reaches.

This gets an estimate of the angle based on the rotation around your z-axis.

Then, you can enter a horizontal distance to your rocket and click "Set bottom" after sighting your rocket.

Now, sight your rocket and hold at the peak. Your chain of data will be shown, including your estimated rocket height.

None of this data leaves your device.

Calculations

  1. The gravity only acceleration data is calculated using (acceleration with gravity) - (acceleration without gravity)
  2. The angle is calculated as shown below. The x,y,z correspond to the acceleration in that direction. 
             /|
        / |
       /  |
      /   |z
     /    |
    /     |
   /Θ     |
  ---------
sqrt(x^2+y^2)
    The hypotenuse should always be 9.8 m/s^2, but the calculations are done as the atan of theta.
  3. The vertical to bottom and vertical to top are easily calculated using the angles. A negative sign means that the location is below the phone, while a positive sign means that the location is above the phone.
  4. The rocket height is the (vertical to top) - (the vertical to bottom).

Accelerometer - only gravity

datapoints: 0
interval: 0 ms

Main Data

Horizontal distance: meters