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Application of satellite magnetic observations for estimating near-surface magnetic anomalies

Earth, Planets and Space volume 56, pages 955–966 (2004)Cite this article

Abstract

Regional to continental scale magnetic anomaly maps are becoming increasingly available from airborne, shipborne, and terrestrial surveys. Satellite data are commonly considered to fill the coverage gaps in regional compilations of these near-surface surveys. For the near-surface Antarctic magnetic anomaly map being produced by the Antarctic Digital Magnetic Anomaly Project (ADMAP), we show that near-surface magnetic anomaly estimation is greatly enhanced by the joint inversion of the near-surface data with Ørsted satellite observations compared to Magsat data that have order-of-magnitude greater measurement errors, albeit collected at much lower orbital altitudes. The CHAMP satellite is observing the geomagnetic field with the same measurement accuracy as the Ørsted mission, but at the lower orbital altitudes covered by Magsat. Hence, additional significant improvement in predicting near-surface magnetic anomalies can result as lithospheric magnetic anomaly data from the CHAMP mission become available. Our analysis also suggests that a further order-of-magnitude improvement in the accuracy of the magnetometer measurements at minimum orbital altitude may reveal considerable new insight into the magnetic properties of the lithosphere.

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Authors and Affiliations

  1. Goddard Earth Science and Technology Center (GEST), University of Maryland, Baltimore County and Code 921, Goddard Space Flight Center/NASA, Greenbelt, Maryland, 20771, USA

    Hyung Rae Kim

  2. Department of Geological Sciences and Byrd Polar Research Center, The Ohio State University, Columbus, Ohio, 43210, USA

    Ralph R. B. von Frese

  3. VNIIOkeangeologia, St. Petersburg, 190121, Russia

    Alexander V. Golynsky

  4. Geodynamics Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771, USA

    Patrick T. Taylor

  5. Department of Geoinformation Engineering, Sejong University, Seoul, 143-747, Korea

    Jeong Woo Kim

Authors
  1. Hyung Rae Kim
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  2. Ralph R. B. von Frese
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  3. Alexander V. Golynsky
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  4. Patrick T. Taylor
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  5. Jeong Woo Kim
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Correspondence to Hyung Rae Kim.

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Kim, H.R., von Frese, R.R.B., Golynsky, A.V. et al. Application of satellite magnetic observations for estimating near-surface magnetic anomalies. Earth Planet Sp 56, 955–966 (2004). https://doi.org/10.1186/BF03351793

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