MAG consists of a pair of identical magnetometers which each measure the Magnetism is one of the basic forces of the universe. A magnetic field is a region of magnetism, which is caused by either moving electric charges or magnetic materials. in three directions in the vicinity of the spacecraft. The magnetometers are both mounted on a boom to minimize The phenomenon where waves, such as radio signals or light waves, overlap and combine, affecting the accuracy of measurements. This can occur when signals from different sources mix, leading to distortion of data or reduction in the clarity of received information. from the spacecraft; two sensors at different distances on the boom are used to help characterize the spacecraft signals.
The Magnetometer (MAG) instrument measures the strength and direction of the magnetic field in interplanetary space as the field is carried past the IMAP spacecraft by the solar wind. It consists of two fluxgate magnetometers installed on a boom arm that will deploy post-launch, extending the instruments away from the spacecraft to minimize magnetic interference of spacecraft and instrument electrical systems. contributes to our understanding of the acceleration and transport of charged particles in the The bubble-like region surrounding the solar system inflated by the solar wind, shielding the solar system from interstellar radiation.. Magnetic fields control how charged particles travel across the solar system, and they are also central to the processes that accelerate these particles, such as shocks and turbulence.
MAG also provides measurements for the IMAP Active Link for Real-A measure of the flow of events. (The IMAP Active Link for Reat-Time (I-ALiRT) system provides a high-cadence stream of near-real time space weather data from the HIT, CoDICE, SWAPI, SWE, and MAG instruments to scientists on Earth via a network of antenna partners located around the globe, including the DSN. This enhanced data stream will assist in improving overall reliability and timing of Earthbound space weather predictions, providing data to forecasters in time for users to take protective action.) The conditions and activity observed in interplanetary space caused by the Sun’s activity, such as solar flares, solar storms, and coronal mass ejections (CMEs). Severe space weather conditions directed towards Earth can impact infrastructure and technology on Earth, as well as satellites, spacecraft, and astronauts in its trajectory. monitoring service. With I-ALiRT, IMAP enables new ways of forecasting space weather by streaming real-time observations of conditions headed towards Earth to operators on the ground.
MAG design and assembly is led by Imperial College London.

The Interstellar Mapping and Acceleration Probe (IMAP) magnetometer sensors after installation to the boom.
Image Credit: NASA/Johns Hopkins APL/Princeton/Ed Whitman
