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

Galapagos GPS Network - GV07-GV07 P.S.
Start: 31-Aug-2018
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, 2006, Galapagos GPS Network - GV07-GV07 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/AB0J-SZ80

Galapagos GPS Network - GV07-GV07 P.S.
Start: 30-Jun-2006
End: 31-Aug-2018
Chadwick, Bill W., Geist, Dennis, 2006, Galapagos GPS Network - GV07-GV07 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5RX9994

Galapagos GPS Network - GV07-GV07 P.S.
Start: 30-Jun-2006
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, Chadwick, Bill W., Geist, Dennis, 2006, Galapagos GPS Network - GV07-GV07 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/WSXX-VM46