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

TZVOLCANO - OLO4-OLO4_OLO_TZA2016 P.S.
Start: 26-Jun-2016
End: 02-Jan-2017
Stamps, D. Sarah, Saria, Elifuraha, Hyeun Ji, Kang, Jones, J. Robert, Ntambila, Daud, Daniels, Mike, Mencin, Dave, 2016, TZVOLCANO - OLO4-OLO4_OLO_TZA2016 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T55M64H7