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

Africa Array GPS Network - EKON-Buea -Ekona P.S.
Start: 30-Jan-2011
End: 30-Dec-2014
Nyblade, Andy, 2011, Africa Array GPS Network - EKON-Buea -Ekona P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5RR1W9D