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

Santorini GPS Network - MKMN-Nea Kameni P.S.
Start: 13-Jan-2012
End: 01-Oct-2012
Parsons, Barry, 2012, Santorini GPS Network - MKMN-Nea Kameni P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T547483N