Acceleration:: Select a value, and then choose whether acceleration should be above or below that value. Acceleration is positive upwards, so accelerating towards the ground would produce negative numbers. Acceleration during descent is noisy and inaccurate, so be careful when using it during these phases of the flight. Vertical speed:: Select a value, and then choose whether vertical speed should be above or below that value. Speed is positive upwards, so moving towards the ground would produce negative numbers. Speed during descent is a bit noisy and so be careful when using it during these phases of the flight. Height:: Select a value, and then choose whether the height above the launch pad should be above or below that value. Orientation:: TeleMega and EasyMega contain a 3-axis gyroscope and accelerometer which is used to measure the current angle. Note that this angle is not the change in angle from the launch pad, but rather absolute relative to gravity; the 3-axis accelerometer is used to compute the angle of the rocket on the launch pad and initialize the system. [NOTE] ==== Because this value is computed by integrating rate gyros, it gets progressively less accurate as the flight goes on. It should have an accumulated error of less than 0.2°/second (after 10 seconds of flight, the error should be less than 2°). The usual use of the orientation configuration is to ensure that the rocket is traveling mostly upwards when deciding whether to ignite air starts or additional stages. For that, choose a reasonable maximum angle (like 20°) and set the motor igniter to require an angle of less than that value. ==== Flight Time:: Time since boost was detected. Select a value and choose whether to activate the pyro channel before or after that amount of time. Ascending:: A simple test saying whether the rocket is going up or not. This is exactly equivalent to testing whether the speed is > 0. Descending:: A simple test saying whether the rocket is going down or not. This is exactly equivalent to testing whether the speed is < 0. After Motor:: The flight software counts each time the rocket starts accelerating and then decelerating (presumably due to a motor or motors burning). Use this value for multi-staged or multi-airstart launches. Delay:: This value doesn't perform any checks, instead it inserts a delay between the time when the other parameters become true and when the pyro channel is activated. Flight State:: The flight software tracks the flight through a sequence of states: * Boost. The motor has lit and the rocket is accelerating upwards. * Fast. The motor has burned out and the rocket is decelerating, but it is going faster than 200m/s. * Coast. The rocket is still moving upwards and decelerating, but the speed is less than 200m/s. * Drogue. The rocket has reached apogee and is heading back down, but is above the configured Main altitude. * Main. The rocket is still descending, and is below the Main altitude * Landed. The rocket is no longer moving. You can select a state to limit when the pyro channel may activate; note that the check is based on when the rocket transitions *into* the state, and so checking for “greater than Boost” means that the rocket is currently in boost or some later state. When a motor burns out, the rocket enters either Fast or Coast state (depending on how fast it is moving). If the computer detects upwards acceleration again, it will move back to Boost state.