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An unsung hero

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R M Trigo and J M Vaquero highlight the careful and methodical work of D João de Castro, a 16th-century sailor whose rigorous approach adds value to his geomagnetic observations even today.

Document Type: Research Article


Affiliations: 1: Centro de Geofísica da Universidade de Lisboa, Lisbon, Portugal, and Departamento de Eng. Civil da Universidade Lusófona, Lisbon. 2: Departamento de Física Aplicada, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10071 Cáceres, Spain.

Publication date: 2008-04-01

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