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

SCIGN USGS GPS Network - FCTF-Factor Building-UCLA P.S.
Start: 13-Jan-2011
End: 11-Jan-2021
Hudnut, Kenneth, King, Nancy, Aspiotes, Aris G., Borsa, Adrian A., Determan, Daniel N., Galetzka, John E., Stark, Keith F., 2013, SCIGN USGS GPS Network - FCTF-Factor Building-UCLA P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5B856DF