KMAG (KPLO MAGnetometer) 

KPLO is the first lunar exploration mission in Korea. It is scheduled for launch in 1 August 2022 and its mission life will be one-year. KMAG is one of the instruments on KPLO. KMAG will measure DC and low-frequency magnetic field variations near the lunar surface and provide a 3-D map of lunar magnetic fields. Due to the very limited available volume and mass on the spacecraft, we have adopted the multi-sensor technique to subtract the spacecraft interference field from observational data. Three triaxial fluxgate magnetometers are installed on a 1.2-meter-long boom. Two magnetometers are located at the end of the boom and one is located near the spacecraft-end of boom. 

Major Instrument Specifications

• Magnetometer: Three-axis fluxgate

• Size of MAG unit: 1318 × 178 × 122 mm

• Size of FCE unit: 150 × 135 × 82 mm 

• Operational temperature of MAG unit: -55 °C ~ +70 °C

• Operational temperature of FCE unit: -20 °C ~ 50 °C

• Mass: Total 3.5 kg

• Power: Input: +28 V (unregulated +24 – 32.8 V)

• Power Consumption: 4.6 Watt

• Interface: RS-422, 115,200 bps

• Data generation: 295.3 Mbit/day (duty 100%)

Requirement Specifications of the KMAG Magnetometer

• • Magnetometer type: Fluxgate (racetrack)

  • Measuring range: ± 1000 nT

  • Resolution: < 0.2 nT at 10 Hz sampling rate

  • Noise : < 50 pT / √Hz at 1 Hz

  • Linearity: < 0.005

  • Axis alignment: < 1 degree

  • Magnetic cleanness: < 700 nT at the inner magnetometer (MAG 3) in the boom

KMAG Data homepage:  kmag.khu.ac.kr  

KMAG related information