Title: TAMDEF: Transantarctic Mountains Deformation Network, GPS Measurements of Rock and Ice Motions in South Victoria Land, Antarctica
Description:
Abstract:
The TAMDEF (TransAntarctic DEFormation) GPS network consists of an
array of 25 primary sites located in the Transantarctic Mountains of
southern Victoria Land and on islands in the adjacent Ross Sea. Ohio
State University and the USGS Antarctic Mapping group jointly carried
out installation and surveying of the TAMDEF array between 1996 and
2001.
Willis et al., (In press; BPRC Report No. 20) provide detailed
information on field methods, data processing, and site
characterization for the TAMDEF network. Steel pins sunk directly into
bedrock were used for monuments. Fixed-height forced-centered level
mounts were used to accurately re-center the GPS antenna at each site
each year. Dorne-Margolin T style choke-ring antennae were exclusively
used to reduce signal interference. All measurements were made at
approximately the same time of year to minimize possible seasonal
fluctuations in the monument positions or atmospheric conditions.
Large multi-day data sets were collected. To be certain that local
periglacial processes did not contaminate the average motion of a
site, we installed a micro-footprint array consisting of at least
3 other GPS monuments around each primary pin. Short, highly accurate
baselines were recorded back to the central pin at least twice over
the 4-year period.
The raw data from the TAMDEF project are available from the UNAVCO
archive at &http://facility.unavco.org/data/data.html&
under &Campaign Data Holdings& and the &Antarctic Support& links. The
data are also available via a web site established at the Ohio State
University &http://www.geology.ohio-state.edu/~willis/&, contact
Michael Willis (willis.146@osu.edu) or Terry Wilson
(wilson.43@osu.edu) for data details and access information.
Raw data from UNAVCO is available via FTP under &Campaign Data Holdings&
and then by following the &Antarctic Support Links& for the 1996/1997,
1997/1998, 1998/1999, and 1999/2000 seasons.
