I attended the local club's rocket launch yesterday, and was able to get some actual flight data. The telemetry system worked pretty well, giving a 3d rendering of the position of the rocket while it collected the data and wrote to the log file. For this flight I used a G-64 motor with a 10 second delay. I was impressed that the 9dof sensors did not get confused seeing the higher g's. Processing was used to render the 3d position of the rocket, and the video was recorded from the computer at time of flight. I tried to get one more recording, but my small battery ran out of juice on the launch pad before the second flight.

There was a small bit of data loss, especially after getting down toward 100 feet above ground level. The transceivers I used are rated to about 2 miles line of sight with standard antennas. I used a directional patch antenna for the base station, pointed nearly directly upward, in the grass near the launch area. The rocket landed about 1800 feet away, and behind a small hill. So the area at the end of the graph shows the signal coming back into view as I walk around the hill back into line of sight. But at 230,400 baud, and a 400 mph rocket, where its a little hard to orient the antenna, I am really pleased by the results.





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