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

Rio Grande Rift GPS Network - RG15-RG15McCoy_CO2006 P.S.
Start: 30-Aug-2006
End: 29-Apr-2009
Sheehan, Anne, 2006, Rio Grande Rift GPS Network - RG15-RG15McCoy_CO2006 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5RX99BK