EMI in Deep Space: NASAs Experience With Jupiter-bound Spacecraft Such As Juno And Europa Clipper Mission
Pablo Narvaez
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29 Jun 2019
Abstract: Jet Propulsion Laboratory (JPL) implemented a comprehensive magnetic cleanliness program of the NASA JPL JUNO mission which is currently orbiting Jupiter and returning invaluable scientific data. Without the implementation of the magnetic cleanliness program, key scientific instruments such as the magnetometer science instrument as well the Microwave Radiometer (MWR) instrument would not be able to perform in the presence of high magnetic fields from the spacecraft and Jupiter. The magnetic cleanliness program was applied from early flight system development up through system level environmental testing. The JUNO magnetic cleanliness program required setting-up a specialized magnetic test facility for testing the flight system and a testing program with a facility for testing subsystem parts and subsystems at JPL. The magnetic modeling, simulation and analysis capability was set up and performed in order to provide qualitative and quantitative magnetic assessments of the magnetic parts, components, and subsystems prior to or in lieu of magnetic tests.
Because of the sensitive nature of the fields and particles scientific measurements as well as the microwave radar instrument being conducted by the JUNO space mission to Jupiter, the imposition of stringent magnetic control specifications required a magnetic control program to ensure that the spacecraft?s science magnetometers and plasma wave search coil were not magnetically contaminated by flight system magnetic interferences. With component and subsystem magnetic modeling, simulation and analysis as well as system modeling and comprehensive testing, the project accomplished a cost effective approach to achieving a magnetically clean spacecraft. The lecture will focus on the approach that was implemented and describe the the scientific results that benefited from the efforts to control spacecraft interference and magnetic contamination of science instruments.
This lecture presents lessons learned from the JUNO magnetic testing approach and modeling, simulation and analysis activities used to solve problems such as remnant magnetization, performance of hard and soft magnetic materials within the targeted space system in applied external magnetic fields and how these lessons learned are being applied to future Jupiter-bound spacecraft such as the Europa Clipper and Lander.
The NASA Europa Clipper spacecraft with its nine science instruments will orbit Jupiter?s icy moon Europa to investigate whether the icy moon could harbor conditions suitable for life. Of those nine science instruments, there are two magnetically sensitive ones: the Plasma Instrument for Magnetic Sounding (PIMS) and the Interior Characterization of Europa using Magnetometry (ICEMAG). The two instruments will measure the strength and direction of the moon?s magnetic field to determine the depth and salinity of its ocean, which hence leads to unique DC magnetic requirements. The lecture will also focus on the DC magnetic model analysis that was performed on Europa Clipper spacecraft to guide design trades and provide an early assessment for the spacecraft in order to ensure that the unique DC magnetic requirements can be met and validated by test in the future.
Because of the sensitive nature of the fields and particles scientific measurements as well as the microwave radar instrument being conducted by the JUNO space mission to Jupiter, the imposition of stringent magnetic control specifications required a magnetic control program to ensure that the spacecraft?s science magnetometers and plasma wave search coil were not magnetically contaminated by flight system magnetic interferences. With component and subsystem magnetic modeling, simulation and analysis as well as system modeling and comprehensive testing, the project accomplished a cost effective approach to achieving a magnetically clean spacecraft. The lecture will focus on the approach that was implemented and describe the the scientific results that benefited from the efforts to control spacecraft interference and magnetic contamination of science instruments.
This lecture presents lessons learned from the JUNO magnetic testing approach and modeling, simulation and analysis activities used to solve problems such as remnant magnetization, performance of hard and soft magnetic materials within the targeted space system in applied external magnetic fields and how these lessons learned are being applied to future Jupiter-bound spacecraft such as the Europa Clipper and Lander.
The NASA Europa Clipper spacecraft with its nine science instruments will orbit Jupiter?s icy moon Europa to investigate whether the icy moon could harbor conditions suitable for life. Of those nine science instruments, there are two magnetically sensitive ones: the Plasma Instrument for Magnetic Sounding (PIMS) and the Interior Characterization of Europa using Magnetometry (ICEMAG). The two instruments will measure the strength and direction of the moon?s magnetic field to determine the depth and salinity of its ocean, which hence leads to unique DC magnetic requirements. The lecture will also focus on the DC magnetic model analysis that was performed on Europa Clipper spacecraft to guide design trades and provide an early assessment for the spacecraft in order to ensure that the unique DC magnetic requirements can be met and validated by test in the future.
