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

Arenal Volcano GPS Network - AROL-Observatory Lodge P.S.
Start: 07-May-1995
End: 10-Feb-2013
Schwartz, Susan, 1995, Arenal Volcano GPS Network - AROL-Observatory Lodge P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5KD1W1T