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

Rio Grande Rift GPS Network - RG17-RG17EmpireCO2006 P.S.
Start: 31-Jul-2006
End: 19-Sep-2022
Sheehan, Anne, 2006, Rio Grande Rift GPS Network - RG17-RG17EmpireCO2006 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T59Z934Q