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

Panama GPS Network - PTPA-PetTerAtlPAN2014 P.S.
Start: 20-May-2014
End: 14-Nov-2018
LaFemina, Peter, 2014, Panama GPS Network - PTPA-PetTerAtlPAN2014 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5BZ642D