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

Hawaii GPS Network - PUOC-Puu Oo Cone P.S.
Start: 17-Jun-2006
End: 01-May-2019
Miklius, Asta, 2006, Hawaii GPS Network - PUOC-Puu Oo Cone P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5J67F54