added rayonix doc

The timestamp interpretation is explained in the HS detector manual (attached) with the relevant excerpt below. You'd most likely be interested in the acquire_timestamp rather than save or header timestamps.

Timestamp

The headers of images collected with HS series detectors have a precise timestamp with nanosecond resolution. The interpretation of the timestamp is as follows:

char acquire_timestamp[32] MMDDhhmmYYYY.ss \0 XXXXXXXXX \0

where M = Months, D = Days, h = hours, m = minutes, Y = Years, s = seconds, \0 = Null, X = nanoseconds (the nine digits after the decimal). The same format applies for header_timestamp and save_timestamp.

Author: DHekstra