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

Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S.
Start: 27-Oct-2008
End: 14-Nov-2022
Lopez, Alberto, Wang, Guoquan, 2011, Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5BC3WW8

Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S.
Start: 08-Sep-2009
End: 01-Sep-2011
Wang, Guoquan, 2011, Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T56Q1VJT

Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S.
Start: 01-Sep-2011
End: 14-Nov-2022
Lopez, Alberto, 2011, Puerto Rico GPS Network - MOPR-Mona Island, Puerto Rico P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5G44NM0