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

Hawaii GPS Network - OUTL-Outlet P.S.
Start: 18-Apr-2008
End: 14-Nov-2022
Miklius, Asta, 2008, Hawaii GPS Network - OUTL-Outlet P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5WH2N7T