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FDSN / SeedLink

https://docs.fdsn.org/projects/seedlink/
Creative Commons Zero v1.0 Universal
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Question on extended resolution #2

Closed luca-s closed 2 years ago

luca-s commented 2 years ago

I read the changes introduced in version 4.0 of seedlink protocol (https://seedlink.readthedocs.io/en/latest/index.html) and I found the interesting new feature Extended time resolution (up to nanoseconds). I was interested in reading the detail of this feature but I couldn't find them.

I found the details of the start_time and end_time though, which are defined as:

The format of start_time and end_time is %Y-%m-%dT%H:%M:%S.%fZ, where %Y, %m, %d, %H, %M, %S denote year, month, day, hour, minute and second as in ANSI C strftime() function and optional .%f denotes decimal fractions of second

However that doesn't limit the resolution to nanoseconds, it can be actually even lower. So I am a little bit confused.

Would it be possible to point me to the exact part of the document where the nanosecond resolution is described?

Thank you!

luca-s commented 2 years ago

I may have understood it now. The nanoseconds limit is derived from the miniSEED 3 standard, whose start time resolution is nanoseconds. So the nanoseconds limit is not in the seedlink protocol itself, but depends on the streamed data format, correct?