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

Africa Array GPS Network - ULUB-UNILU P.S.
Start: 25-Nov-2009
End: 04-Aug-2014
Delvaux, Damien, 2010, Africa Array GPS Network - ULUB-UNILU P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5C53J2M