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

CVO GPS Network - CSHR-MR_CSCHRMNWA2007 P.S.
Start: 13-Sep-2007
End: 17-Sep-2014
Lisowski, Michael, 2008, CVO GPS Network - CSHR-MR_CSCHRMNWA2007 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5M61HC0