‘Clean’ observations of magnetic field fluctuations on planetary surfaces

Magnetic field measurements on planetary surfaces are disturbed by various internal and external sources. We discuss methods to reduce their influence on the quality of magnetic field experiments aboard surface stations. Our major emphasis is on terrestrial seismo-magnetic measurements, but magnetic cleanliness procedures for the ROSETTA lander magnetic field experiment is discussed too. We consider not only disturbing magnetic field sources as magnetized material or current loops but also environmental sources as the vibration of the magnetic field sensors and eddy currents in conducting material.