Erebus GPS timeseries

We use NASA's Jet Propulsion Laboratory's (JPL) GipsyX software in PPP mode with ambiguity resolution
applied to 24 hour segments of data to generate daily position solutions. We use JPL's orbit and
clock products and International GNSS Service (IGS) antenna phase center models. Where available,
we use JPL's second order ionospheric corrections, otherwise we fall back on those provided by the
IGS. To correct tropospheric delays, we use the GPT2 model as implemented in GipsyX. Ocean tidal
loading corrections utilize the TPXO7.2 and ATLAS model, a combination of hydrodynamic model and
altimetry data, with respect to Earth's Center of Mass implemented in SPOTL. We obtain position
solutions for each station day in a fiducial-free reference frame, which we then transform into
the 2014 International Reference Frame using JPL's transformation coefficients and generate
timeseries of position change relative to the first epoch, given in the *.series files which
are ASCII files with the following columns:

decimal year
displacement east (m)
displacement north (m)
displacement up (m)
sigma east (m)
sigma north (m)
sigma up (m)
east-north covariance
east-up covariance
north-up covariance
Year (YYYY)
Month (MM)
Day (DD)
Hour (hh)
Minute (mm)
Second (ss)
Solution path

We generate position time series relative to stable Antarctic plate by removing the plate velocities
modeled by Argus et al (2010). These are provided in the *.npy files that be readily read into
python scripts:

pos_ts = np.load('test.npy').flatten()[0]

pos_ts['itrf'] provides the ITRF data as above
pos_ts['plate'] provides the data with Antarctic plate motion removed.