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

MAGNET - BOUL-BOUL P.S.
Start: 23-Mar-2007
End: 10-Apr-2018
Blewitt, Geoff, Hammond, William C., Kreemer, Corne, 2009, MAGNET - BOUL-BOUL P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5BG2M4R