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

SAF Creeping Segment GPS Network - QCYN-San Benito Winery P.S.
Start: 23-Jan-2003
End: 12-Jun-2006
DeMets, Charles, 2004, SAF Creeping Segment GPS Network - QCYN-San Benito Winery P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T54J0C6T