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

Rio Grande Rift GPS Network - RG26-RG26McCoy_CO2009 P.S.
Start: 28-Apr-2009
End: 29-Aug-2016
Sheehan, Anne, 2009, Rio Grande Rift GPS Network - RG26-RG26McCoy_CO2009 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5DR2SQT