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

Galapagos GPS Network - GV06-GV06 P.S.
Start: 31-Aug-2018
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, 2002, Galapagos GPS Network - GV06-GV06 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/61RQ-0887

Galapagos GPS Network - GV06-GV06 P.S.
Start: 01-Jun-2002
End: 30-May-2022
LaFemina, Peter, Amelung, Falk, Geist, Dennis, Chadwick, Bill W., Meertens, Charles, 2002, Galapagos GPS Network - GV06-GV06 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/V0Q7-CQ20

Galapagos GPS Network - GV06-GV06 P.S.
Start: 01-Jun-2002
End: 31-Aug-2018
Geist, Dennis, Chadwick, Bill W., Meertens, Charles, 2002, Galapagos GPS Network - GV06-GV06 P.S., UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5M61HHS