GNSS measurements at a basal melt channel of the southern Filchner Ice Shelf, Antarctica

Five short-period GPS were located at a cross-section of the channel, located east outside the channel (GPS_oe), at the eastern steepest flank of the surface depression (GPS_se), within the channel at the lowest surface depression (GPS_low), at the western steepest flank (GPS_sw) and west outside the channel (GPS_we).

All five GPS operated for 9 to 13 days with a measuring interval of 15 seconds (GPS_oe, GPS_se, GPS_sw, GPS_low) or 1 second (GPS_ow). The long-period GPS (GPS_se_long) operated at the steepest eastern flank of the channel for 103 days with a measuring interval of 15 seconds. The short-period GPS were operated parallel to an autonomous phase-sensitive radar (ApRES, see doi:10.1594/PANGAEA.932413) intended to measure basal melt rates.