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

TZVOLCANO - OLO7-OLO7_OLO_TZA2017 P.S.
Start: 18-Apr-2017
End: 13-Nov-2022
Stamps, D. Sarah, Saria, Elifuraha, Hyeun Ji, Kang, Jones, J. Robert, Ntambila, Daud, Daniels, Mike, Mencin, Dave, 2017, TZVOLCANO - OLO7-OLO7_OLO_TZA2017 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5F47MW0