xshr1

The 1 day sampled data represent a merger between the older instrument, installed
in 1971, and its replacement, installed ~1985. That instrument was on
telemetry until 1997; from then until 2017, only manual, micrometer measurements
were made. The instrument was destroyed in 2017.  In 2020, a replacement
instrument was installed and that is on telemetry.  The manual and 1-day
sampled data files are for the data up to 2017; the 10-min file is for the
data after 2020.