The Ørsted Satellite Project

A Danish Microsatellite With a High Scientific Profile

Papers and reports


IMPROVED DETECTION OF OBSERVATORY CRUSTAL MAGNETIC BIASES USING ØRSTED

 

Mandea, M. (1) and B. Langlais (1)

  1. Institut de Physique du Globe de Paris, 4, Place Jussieu, B89, Tour 24, 75252 Paris Cedex 05, France, e-mail: mioara@ipgp.jussieu.fr

Abstract. Assuming a main-field model derived from Ørsted satellite, high-altitude magnetic measurements, the crustal influence on satellite data can be treated as random noise. The satellite data can thus be used in conjunction with magnetic observatory measurements to isolate the non-core field at the observatory locations. The anomaly biases for the horizontal northward X, eastward Y and vertical downward Z components are computed for all observatory locations where data are available for the year 1999. For a set of observatories operationg in 1979/1980 (MAGSAT epoch) and 1999/2000 (Ørsted epoch) the computed biases are compared and discussed.