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

Wasatch GPS Network - SUR1-Surveyor 1 P.S.
Start: 24-Feb-1997
End: 08-Aug-1998
Smith, Robert B., Meertens, Charles, 1998, Wasatch GPS Network - SUR1-Surveyor 1 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5X928K0