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

Puerto Rico RAPID GPS Network - NWRC-NWRC_CAR_PRI2021 P.S.
Start: 29-Jul-2021
End: 14-Nov-2022
Lopez, Alberto, 2021, Puerto Rico RAPID GPS Network - NWRC-NWRC_CAR_PRI2021 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/14JV-2J74