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

Geopentech GPS Network - AR53-Area_53_CPCA2013 P.S.
Start: 04-Dec-2013
End: 14-Nov-2022
Walls, Chris, 2013, Geopentech GPS Network - AR53-Area_53_CPCA2013 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T58C9TCC