Greenland ice velocity during two lake drainage events (June 2011)

Data were collected during June of 2011 on the west coast of Greenland. Antennas were mounted on aluminum poles drilled into the ice with a portable steam drill to a depth of 6 m. GPS data were logged every 15 seconds, and positions were determined by carrier-phase differential processing using TRACK software with base station KAGA (25 km to the south) as a reference and final International GNSS Service satellite orbits. Each 15-second GPS time series was re-sampled to a six-minute interval, and a 1-hr moving average was then applied to reduce the siderial noise. Data are provided as a matlab structure variable with the following fields: T=time [julian days for the year 2011] X , Y, Z = position [in m] Mn_interval and mn_window [Internal descriptor] Goodfraction [Internal descriptor] V24 [24 hours averaged speed] V24q [internal descriptor] V12 [12 hours averaged speed] V12q [internal descriptor] V6 [6 hours averaged speed] V6q [6 internal descriptor] V1 [1 hour averaged speed] V1q [internal descriptor]