Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)

• Main Authors: Young, Duncan A., Holt, John W., Blankenship, Donald D.
• Format: Dataset
• Language: unknown
• Published: IEDA: US Antarctic Program Data Center 2017
• Subjects: Antarctic Earth Sciences; GIMBLE; Gravity; Navigation; Potential Field; Antarctica; Glaciers/Ice Sheet; Cryosphere; Solid Earth; Marie Byrd Land; US Antarctic Program Data Center (USAP-DC); Antarctic; West Antarctica; Byrd; Antarc*; Ice Sheet
• Online Access: http://get.iedadata.org/metadata/iso/601003

Abstract: GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading "#" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GGCMG2 contains line based data relating to gravity disturbance, processed from raw acceleration and position data by propriety software from Gravimetric Technologies and Novatel. The raw data was obtained a Canadian MicroGravity GT-1A gravimeter in ICP5, and a GT-2A gravimeter in ICP6. Data reduction was led by T. Richter.