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

MAGNET - LNRD-LNRD P.S.
Start: 01-Jul-2011
End: 02-Aug-2017
Blewitt, Geoff, Hammond, William C., Kreemer, Corne, 2011, MAGNET - LNRD-LNRD P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5FF3QJB