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

Costa Rica GPS Network - PNE2-Playa Negra 2 P.S.
Start: 12-Jul-2009
End: 14-Nov-2022
Dixon, Timothy H., Protti, Marino, 2010, Costa Rica GPS Network - PNE2-Playa Negra 2 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5D50K43