D
Dan Major
- Jan 1, 1970
- 0
I was pondering over on the model rocket newsgroup about a simple way to
measure the velocity of a model rocket. One poster had come up with the
idea of using a "surplus" police radar set on e-bay. The problem with this
is the extremely small RCS of a paper-and-balsa rocket traveling away from
the radar. My idea was to put a small fixed-frequency transmitter in the
rocket. A ground-based receiver tuned to the same frequency would notice a
doppler shift as the rocket accellerated away.
Questions:
1) is this practical?
2) could the error signal from a phase locked loop be used to indicate the
doppler shift?
3) can this be easily/cheaply (under $50) implemented?
measure the velocity of a model rocket. One poster had come up with the
idea of using a "surplus" police radar set on e-bay. The problem with this
is the extremely small RCS of a paper-and-balsa rocket traveling away from
the radar. My idea was to put a small fixed-frequency transmitter in the
rocket. A ground-based receiver tuned to the same frequency would notice a
doppler shift as the rocket accellerated away.
Questions:
1) is this practical?
2) could the error signal from a phase locked loop be used to indicate the
doppler shift?
3) can this be easily/cheaply (under $50) implemented?