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

Galapagos GPS Network - GV08-GV08 P.S.
Start: 31-Aug-2018
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, 2006, Galapagos GPS Network - GV08-GV08 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/GY33-F024

Galapagos GPS Network - GV08-GV08 P.S.
Start: 30-Jun-2006
End: 31-Aug-2018
Chadwick, Bill W., Geist, Dennis, 2006, Galapagos GPS Network - GV08-GV08 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5CN725H

Galapagos GPS Network - GV08-GV08 P.S.
Start: 30-Jun-2006
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, Chadwick, Bill W., Geist, Dennis, 2006, Galapagos GPS Network - GV08-GV08 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/8YYQ-3B89