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

PBO GPS Network - P369-WildSafariOR2005 P.S.
Start: 12-Aug-2005
End: 26-May-2020
UNAVCO Community, 2005, PBO GPS Network - P369-WildSafariOR2005 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5HX19ND