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

CVO GPS Network - WBR2-WBR2 P.S.
Start: 04-Oct-2018
End: 16-Oct-2019
Dzurisin, Daniel, 2020, CVO GPS Network - WBR2-WBR2 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/4SM7-CD76