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

Southern Basin and Range GPS Network - FRED-Fredonia P.S.
Start: 29-May-1999
End: 21-Nov-2005
Wernicke, Brian P., 1999, Southern Basin and Range GPS Network - FRED-Fredonia P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T54J0CFZ

Southern Basin and Range GPS Network - FRED-Fredonia P.S.
Start: 29-May-1999
End: 14-Nov-2022
UNAVCO Community, Wernicke, Brian P., 1999, Southern Basin and Range GPS Network - FRED-Fredonia P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T589145P

Southern Basin and Range GPS Network - FRED-Fredonia P.S.
Start: 21-Nov-2005
End: 14-Nov-2022
UNAVCO Community, 1999, Southern Basin and Range GPS Network - FRED-Fredonia P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5D21VX2