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

British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica
Start: 02-May-2013
End: 31-Dec-2014
Whitehouse, Pippa, Clarke, Peter, King, Matt, 2017, British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica, UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/JPE9-MN35

British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica
Start: 10-Dec-2018
End: 31-Dec-2014
Whitehouse, Pippa, Clarke, Peter, 2017, British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica, UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/A193-FN92

British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica
Start: 02-May-2013
End: 10-Dec-2018
King, Matt, 2017, British Antarctic Survey GPS Network - MELM-Mid-Ellsworth Mountains P.S. - West Antarctica, UNAVCO, GPS/GNSS Observations Dataset, 
https://doi.org/10.7283/T5PR7TC4