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

Santorini GPS Network - NOMI-Thera Greece P.S.
Start: 09-May-2006
End: 19-Jan-2016
Newman, Andrew, 2006, Santorini GPS Network - NOMI-Thera Greece P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5BC3WPK