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

Costa Rica GPS Network - HATI-Hatillo P.S.
Start: 14-Jun-2006
End: 24-Jun-2020
Dixon, Timothy H., Protti, Marino, 2007, Costa Rica GPS Network - HATI-Hatillo P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5X34VM5