NSSDCA ID: 1998-041A-09
Mission Name: NozomiThe Magnetic Field Investigation (MGF) consists of a three-axis fluxgate magnetometer mounted on a boom. The magnetometer is designed to study the martian magnetic field at high resolution during 150 km periapsis passes and the magnetic field environment out to its orbital apoapsis of 15 Mars radii. The primary scientific objectives of the MGF are to measure the intrinsic martian global magnetic field and the magnetic moment of Mars, and map the structure of the crustal magnetic field.
The magnetometer sensor has a ring-core geometry and is mounted on a 5 meter boom which extends outward from the side of the spacecraft, putting the magnetometer sensor 6 meters from the spacecraft spin axis. The sensor itself has a mass of 0.23 kg. The system consists of an amplifier, filter, phase-sensitive detector, integrator, and voltage-current converter and is essentially the same as the systems used on the Akebono and Geotail missions. The sensor has four dynamic ranges, +/- 16, 256, 1024, and 65536 nT. The sampling is synchronized with the 7.5 rpm spacecraft spin at 256 vectors/spin (32 vectors/second). The data compilation bit rate varies from 64 to 65,536 bps and the data are stored on the onboard data recorder. The electronics are shared with the UV Spectra and Electron Temperature Probe instruments.
Mass: 2.95 kg
Questions and comments about this experiment can be directed to: Dr. David R. Williams
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Takefumi Yamamoto | Principal Investigator | Institute of Space and Aeronautical Science |