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

RAPID Alaska Response GPS Network - STEM-STEM_WAS_USA2019 P.S.
Start: 24-Aug-2019
End: 14-Nov-2022
Elliott, Julie L., Freymueller, Jeffrey T., 2020, RAPID Alaska Response GPS Network - STEM-STEM_WAS_USA2019 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/TQPA-R111