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

COCONet GPS Network - CN28-Contadora_Is_PAN P.S.
Start: 14-Mar-2013
End: 16-May-2019
UNAVCO Community, 2013, COCONet GPS Network - CN28-Contadora_Is_PAN P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T51C1V5W