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

Ecuador GPS Network - APEC-APEC_ApueECU2017 P.S.
Start: 06-Jul-2017
End: 03-Aug-2020
LaFemina, Peter, Freymueller, Jeffrey T., 2017, Ecuador GPS Network - APEC-APEC_ApueECU2017 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5W37V2T