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Observatory crustal magnetic biases during MAGSAT and Ørsted satellite missions
Author(s) -
Mandea Mioara,
Langlais Benoit
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013693
Subject(s) - observatory , satellite , geology , geodesy , magnetic anomaly , remote sensing , geophysics , physics , astronomy
Computing main‐field models derived from MAGSAT and Ørsted satellite magnetic measurements, the crustal influence on satellite data can be treated as random noise. Satellite data can thus be used in conjunction with magnetic observatory measurements to isolate the non‐core field at the observatory locations. Crustal biases for the horizontal northward X , eastward Y and vertical downward Z components are computed for all magnetic observatories where data are available for MAGSAT (1979–1980) and Ørsted (1999–2000) epochs, to study their correlation over twenty years. For a set of observatories installed after 1979 new crustal biases are computed.