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

Guerrero Coast GPS Network - OAXA-Oaxaca P.S.
Start: 01-Mar-2001
End: 25-Nov-2002
Kostoglodov, Vladimir, Santiago, Jose A., 2002, Guerrero Coast GPS Network - OAXA-Oaxaca P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5B856BJ