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

COCONet GPS Network - CN45-CN_Toco_GPS_2013 P.S.
Start: 15-Jun-2013
End: 12-Feb-2018
UNAVCO Community, 2014, COCONet GPS Network - CN45-CN_Toco_GPS_2013 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5445JS8