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

MAGNET - WLLS-WLLS P.S.
Start: 28-Apr-2008
End: 12-Sep-2022
Blewitt, Geoff, Hammond, William C., Kreemer, Corne, 2010, MAGNET - WLLS-WLLS P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5XG9PCN