possible high precision time examples

Hi,
As you will be discussing time at the meeting later... (and apologies to Chris for getting any terminology wrong below !)
At the last F2F it was discussed whether there were real use cases for high accuracy/high precision time observations.
I've found a few recent applications in development for smartphones that use the internal magnetometer and accelerometer sensors for early earthquake detection [1] and for crowd sourcing changes in the geomagnetic field [2]. These are probably examples where accurate and precise recording of universal time matters (ie to the second or millisecond), though I'm still looking into the details. The internal time series recording of shaking in a smartphone could potentially be submitted after the event as a supplement to the human reports of felt intensity, so we could choose to include this as an extension to our Crowd sourced earthquake observation information use case.
There is also a platform in development for using smartphone accelerometers to crowd source the modal frequencies of vibrations of bridges and buildings for Structural Health Monitoring [3], but I presume these don't require an observation of universal time, just an accurate enough internal tick clock, so probably not relevant to us.
[1] http://myshake.berkeley.edu/
[2] http://www.ngdc.noaa.gov/geomag/crowdmag.shtml
[3] http://www.ncbi.nlm.nih.gov/pubmed/25643056
Regards,
Rachel

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