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

Denali Fault GPS Network - FRIG-Refrigerator Rock P.S.
Start: 09-Nov-2002
End: 01-Sep-2020
Freymueller, Jeffrey T., Burgmann, Roland, 2003, Denali Fault GPS Network - FRIG-Refrigerator Rock P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5Z60MFV