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

Alaska Volcano Observatory GPS Network Okmok - OKNC-Okmok Cone B P.S.
Start: 24-Jul-2010
End: 14-Nov-2022
Freymueller, Jeffrey T., Grapenthin, Ronni, 2010, Alaska Volcano Observatory GPS Network Okmok - OKNC-Okmok Cone B P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5KH0KQQ