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

Costa Rica GPS Network - QSEC-Quebrada Seca P.S.
Start: 28-Apr-2006
End: 10-Apr-2022
Dixon, Timothy H., Protti, Marino, 2006, Costa Rica GPS Network - QSEC-Quebrada Seca P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5SF2TBM