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

Guerrero Coast GPS Network - COYU-Coyuca P.S.
Start: 24-Mar-2003
End: 10-Oct-2009
Larson, Kristine, Kostoglodov, Vladimir, Santiago, Jose A., 2003, Guerrero Coast GPS Network - COYU-Coyuca P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5TQ5ZM2