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

Hawaii GPS Network - SPIL-Pu`u `O`o Spillway P.S.
Start: 06-Jul-2007
End: 15-Jan-2013
Miklius, Asta, 2007, Hawaii GPS Network - SPIL-Pu`u `O`o Spillway P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5VH5M20