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Table 2 The SACFM-2 model input data in three categories, satellite (SAT), observatory (OBS) and geomagnetic repeat station (GRS) data

From: A harmonic spline magnetic main field model for Southern Africa combining ground and satellite data to describe the evolution of the South Atlantic Anomaly in this region between 2005 and 2010

  SAT OBS GRS
Number of data centres 645 4 35
Number of data points 6150 290 210
Weight of data 25 100 50