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

Southeast Alaska GPS Network - MDFC-Million Dollar Falls Continuous P.S
Start: 04-Oct-2006
End: 24-Mar-2021
Freymueller, Jeffrey T., 2006, Southeast Alaska GPS Network - MDFC-Million Dollar Falls Continuous P.S, UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/S92T-2737