Vector sample timing
This question came up:
| Quote |
| Once decoded, the Vector gives a time for first and last measurement. These are only given to the second, and on a test I ran yesterday, this resulted in the sample rate being 63.9186 Hz and not 64 Hz, calculated from the start/end elapsed time and the number of samples. Is there a better time stamp to use for the start and end times (something out to hundreths of a second) or a way to get more accuracy from the clock? Which should we trust when determining sample rate, elapsed time/ num. of samples or the sample rate set in the software? |
The timing of the sensor data is coarse and can not be used to derive the sample times. The most accurate sample timing is found from the time stored in the velocity header, combined with the sample number and the sample rate set in software. This is described in detail here.
Best regards,
Sven Nylund
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