HR: 1330h
AN: GP13A-02    [Abstracts]
TI: Spherical Cap Harmonic Modeling of the Antarctic Magnetic Anomaly Map
AU: * Gaya-Pique, L R
EM: luis@geology.ohio-state.edu
AF: Istituto Nazionale di Geofisica e Vulcanologia - Roma 2, Via di Vigna Murata 605, Rome, 00143 Italy
AU: * Gaya-Pique, L R
EM: luis@geology.ohio-state.edu
AF: Department of Geological Sciences - The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210-1308 United States
AU: Kim, H
EM: kimhr@core2.gsfc.nasa.gov
AF: GEST/UMBC at Planetary Geodynamics Branch, Goddard Space Flight Center / NASA, Greenbelt, MD 20771 United States
AU: von Frese, R R
EM: vonfrese@geology.ohio-state.edu
AF: Department of Geological Sciences - The Ohio State University, 275 Mendenhall Laboratory, 125 South Oval Mall, Columbus, OH 43210-1308 United States
AU: Chiappini, M
EM: chiappini@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Roma 2, Via di Vigna Murata 605, Rome, 00143 Italy
AU: Taylor, P T
EM: Patrick.T.Taylor@nasa.gov
AF: Planetary Geodynamics Branch, Goddard Space Flight Center / NASA, Greenbelt, MD 20771 United States
AU: Golynsky, A V
EM: sasha@vniio.nw.ru
AF: All-Russian Research Institute for Geology and Mineral Resources of the World Ocean - VNIIOkeangeologia, 1 Angliysky Ave., St. Petersburg, 190121 Russian Federation
AB: During the last decade the Antarctic Digital Magnetic Anomaly Project (ADMAP) produced a representation of the Antarctic crustal magnetic anomalies. All the ground, marine and aeromagnetic data collected south of 60°S since the IGY 1957-58 were compiled and reprocessed to produce a regional crustal magnetic anomaly map with a 5-km grid interval. Satellite-altitude crustal anomalies from the CHAMP (400 km) and Ørsted (700 km altitude) missions were also processed and used to fill in regional gaps in the near-surface survey coverage. In this paper, we report on our efforts to develop a Spherical Cap Harmonic (SCH) model of the multi-altitude crustal magnetic observations. The purpose of our work is to produce a regional model that will depict the crustal magnetic anomalies anywhere between the surface and satellite altitude with an accuracy not achieved by global-Earth models. The new SCH model synthesizes almost 50 years of magnetic survey observations to facilitate our future studies of the Antarctic magnetic field.
DE: 1517 Magnetic anomaly modeling
DE: 1532 Reference fields (regional, global)
DE: 1545 Spatial variations (all harmonics and anomalies)
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2005 Joint Assembly