The following information obtained from UNAVCO's online DOI system:
(https://www.unavco.org/data/doi/search/search.html)

Antarctica PI Continuous - GZ19-WIS_GroundingZone_19 P.S.
Start: 25-Jan-2014
End: 22-Nov-2016
Siegfried, Matthew R., Fricker, Helen Amanda, Tulaczyk, Slawek, 2014, Antarctica PI Continuous - GZ19-WIS_GroundingZone_19 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T53R0RPD