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

Arenal Volcano GPS Network - LOL2-Los Lagos 2 (volcan Arenal) P.S.
Start: 11-Apr-2007
End: 26-Sep-2012
Protti, Marino, 2012, Arenal Volcano GPS Network - LOL2-Los Lagos 2 (volcan Arenal) P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5513WGW