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

Wasatch GPS Network - ALUT-Alta, Utah P.S.
Start: 07-Oct-2005
End: 05-Jan-2020
Smith, Robert B., 2005, Wasatch GPS Network - ALUT-Alta, Utah P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5319T5P