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

• Main Authors: Marco Tedesco, M. J. Hoffman, I.C. Willis, P. M. Alexander, A. F. Banwell
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2013
• Subjects: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MOTION/ICE SHEET MOTION; EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > POSITIONING/NAVIGATION > GPS > GPS RECEIVERS; FIELD SURVEY; POINT; HOURLY TO DAILY; 1 MINUTE TO 1 HOUR; Greenland; Survey Point; glacier; Ice Sheet
• Online Access: https://search.dataone.org/view/urn:uuid:30b8baca-e59d-4ed6-b3f6-63f6ee359ddc

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]