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

Central Andean Tectonic Observatory Geodetic Array - VLZL-Valenzuela P.S.
Start: 26-Sep-2006
End: 18-Dec-2014
Simons, Mark, Galetzka, John E., Genrich, Jeff F., Ortega, Francisco, Comte, Diana, Glass, Bianca, Gonzalez, Gabriel, 2010, Central Andean Tectonic Observatory Geodetic Array - VLZL-Valenzuela P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T53J3B0J