Numerical Techniques for Removing Instrumental Noise in the Solar Probe Plus/FIELDS Search Coil Magnetometer

Tuesday, 16 December 2014
Trevor A Bowen1, Stuart D Bale1, Davin E Larson2, Thierry Dudok de Wit3 and Robert J. MacDowall4, (1)University of California Berkeley, Berkeley, CA, United States, (2)Space Sciences Laboratory, Berkeley, CA, United States, (3)University of Orleans, Orleans, France, (4)NASA Goddard SFC, Greenbelt, MD, United States
The science goals for NASA's Solar Probe Plus (SPP) mission require broadband measurements of magnetic and electric fields in the inner heliosphere. The FIELDS instrument suite will provide SPP with high cadence vector measurements of the coronal magnetic field using two flux gate magnetometers (MAGs) and a single search coil magnetometer (SCM). The SPP spacecraft design places significant limitations on the length of the magnetometer boom. We demonstrate that the short separation distance between the magnetometers causes contaminated measurements of the magnetic field made by the SCM. A source of this contamination is the drive frequency, and harmonics, of the MAGs. We explore the use of numerical techniques, primarily based in Fourier transforms, to quantify and remove this noise from the SCM data.