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

Bangladesh GPS Network - BNTL-BNTL_Ass_BGD2019 P.S.
Start: 26-Jul-2019
End: 20-May-2022
Steckler, Michael, 2021, Bangladesh GPS Network - BNTL-BNTL_Ass_BGD2019 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/VT6X-SF54