Discussion
Consider the following statements about sampling:
1. Sampling rate is matched to how quickly a parameter can change.
2. A parameter appearing once per one-second subframe is sampled at 1 hertz.
3. Every parameter is recorded at the same rate.
Which of the statements given above is or are correct?
Answer: D
Correct answer: 1 and 2 only
The first two are correct: rates are matched to how quickly each parameter can change, and one appearance per one-second subframe is one sample per second.
The third contradicts the first. Rates vary widely, from 8 Hz for vertical acceleration down to 0.25 Hz for fuel quantity, precisely because frame capacity is finite and must be spent where information exists. Equal sampling would waste bandwidth on slow parameters and starve the fast ones.
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