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

Northern Basin and Range GPS Network - TUNG-Tungsten P.S.
Start: 20-Jul-1996
End: 08-Feb-2006
Davis, James, 1996, Northern Basin and Range GPS Network - TUNG-Tungsten P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5D50KBS

Northern Basin and Range GPS Network - TUNG-Tungsten P.S.
Start: 20-Jul-1996
End: 14-Nov-2022
UNAVCO Community, Davis, James, 1996, Northern Basin and Range GPS Network - TUNG-Tungsten P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T58C9TMH

Northern Basin and Range GPS Network - TUNG-Tungsten P.S.
Start: 08-Feb-2006
End: 14-Nov-2022
UNAVCO Community, 1996, Northern Basin and Range GPS Network - TUNG-Tungsten P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5HX1B26