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

CAP Andes GPS Network - DUAO-Duao P.S.
Start: 25-Mar-2010
End: 19-Sep-2013
Bevis, Michael, 2010, CAP Andes GPS Network - DUAO-Duao P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5ZC80XF