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

Costa Rica GPS Network - OVSI-Observatorio Vulcanologico y Sismologico de Costa P.S.
Start: 07-Oct-2002
End: 21-Aug-2013
Protti, Marino, 2014, Costa Rica GPS Network - OVSI-Observatorio Vulcanologico y Sismologico de Costa P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T51C1V4F