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

CVO GPS Network - SEPR-September Lobe Reset P.S.
Start: 27-Sep-2017
End: 14-Nov-2022
Montgomery-Brown, Emily, 2018, CVO GPS Network - SEPR-September Lobe Reset P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/5998-QC16