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

HoustonNet GPS Network - UHKD-University of Houston Katy deep P.S.
Start: 20-Dec-2018
End: 04-Aug-2022
Wang, Guoquan, 2019, HoustonNet GPS Network - UHKD-University of Houston Katy deep P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/TPMK-9682