The IceBridge L1B Thinned Flight Lines data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) from 27 March 2009 to 19 April 2018.
This data set contains simplified, or thinned, flight lines from NASA Operation IceBridge Greenland, Arctic, Antarctic, and Alaska missions. The thinning was performed using a Python library called Shapely. The full resolution flight line data were collected as part of Operation IceBridge funded aircraft survey campaigns.
Data set DOI: https://doi.org/10.5067/C3HEIVPUW8FW