Tidal heights listed in these files are in meters and are relative to
a station-dependent datum. Tidal heights are measured every 12-min
using a digital tide guage and Campbell data logger. High and low tides
are determined by comparing a value to the preceeding and following 8
tide values, subject to the constraint that it does not vary by more
than 0.2 m from the previous or following value. 

The HOGI station is located on a post approximately 150 m west of the
Machipango Station on Hog Island, VA (UTM 440850 W, 4144830 N, Zone
18). Marcio Santos (pers. comm.)  estimated that mean sea level for
this station is 2.482774 m on the relative scale used at this station.
This estimate was based on 102 days of observation from August 1992
through February 1993. The post and sensor were destroyed by ice
during the winter of 1994-1995 so these constants apply only to data
prior to November 1, 1994.

The HOG2 station is located in a tidal creek underneath the Machipango
Station on northern Hog Island, VA. It was installed on March 27,
1995. Because of its location, it captures high tides, but may be out
of the water on low tides.

The REDB station is located on a dock in a tidal creek at in Redbank VA.

Please give credit where credit is due!

Citation for this data is:

Krovetz, D.O., J.R. Spitler and J.H. Porter. 19xx. Tide Data for the
Virginia Coast Reserve, 19xx.  Data of the Virginia Coast Reserve
Long-term Ecological Research Project.

Where xx is the year of the data used.

If you use VCR/LTER-generated data in a publication, please
acknowledge the VCR/LTER and cite support from NSF grants
BSR-8702333-06 and DEB-9211772. We would also like to receive a copy
of your publication(s). Please send them to: VCR/LTER, Department of
Environmental Sciences, Clark Hall, University of Virginia,
Charlottesville, VA 22903.