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

Telica Volcano GPS Network - CNG2-CerroNegrNIC2010 P.S.
Start: 22-May-2011
End: 12-Jan-2018
LaFemina, Peter, 2014, Telica Volcano GPS Network - CNG2-CerroNegrNIC2010 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5ZP445T