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IEEE IAS Society Distinguished Lecturer Talk: Results of the JUNO Jupiter Mission and the Difficulty in Designing the Spacecraft to Operate in Harsh Environment Existing in Jupiter, and Lessons Learned Applied to the Upcoming Europa Clipper Mission

on October 24, 2019 from 6:00 PM to 8:30 PM

Speaker Pablo Simon Narvaez
Topic Info

Topics: 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 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.

Speaker Bio

Speaker Bio:  Pablo Narvaez is the subject matter expert for the National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory (JPL) in flight spacecraft Electromagnetic Compatibility and Magnetic environments (EMC/Mag). Pablo has held the title of Principal in the area of EMC/Mag for fourteen years and has continued to contribute and become a Laboratory resource in all aspects of Spacecraft Electromagnetic Compatibility. Currently, he is the Lead Environments Engineer for the NASA flagship mission Europa Clipper. He is a Senior Member of the Institute of Electronic and Electrical Engineers (IEEE). In addition, he is recognized in the professional community (government, NASA and industry) as a subject matter expert and is the Vice Chairman of the Institute of Electrical and Electronic Engineers (IEEE) EMC Technical Committee 8 (TC-8) on Aeronautics and Space EMC. In addition, he represents the United States on the International Organization for Standardization (ISO) Technical Committee 20 Subcommittee 14 for Space Systems and Operations (SC14) and is the Project Lead for the international standards in EMC and Magnetics requirements and testing. Also, Pablo was elected to be one of twenty-five national committee members of the American Institute of Aeronautics and Astronautics

(AIAA) EMC Committee on Standards S-121, who oversaw the development and revision of EMC requirements for space systems, which was officially approved in December 2017 and released to the nation on January 2018.


He led the EMC/Mag efforts for the following spacecraft and science instruments: Galileo Spacecraft (from 1985, up to launch in 1989; post-Challenger re-design for Venus Earth Gravity Assist or VEEGA mission), Ulysses Spacecraft, instruments flown on the Shuttle (Shuttle Radar Topography Mission or STRM, Shuttle Imaging Radar or SIR-C, Lambda Point Experiment, Drop Physics Module), Cassini Spacecraft, Mars Exploration Rovers, CloudSat Spacecraft, Deep Impact Spacecraft, Dawn Spacecraft, OCO-2 Spacecraft, Aquarius/SAC-D Spacecraft, Juno Spacecraft and the just recently launched Grace Follow-On twin spacecraft. He is currently overseeing the EMC/Mag efforts for of the following spacecraft: Europa Clipper, Mars 2020, Surface Wave Ocean Topography, and non-NASA projects.


As a result of his many contributions, Pablo received the NASA Manned Space Flight Awareness Honoree in September 2000, NASA Exceptional Service Award 2005, JPL Ranger Award for Outstanding Leadership on International Team 2009, JPL Explorer Award for Scientific and Technical Excellence 2009, JPL Magellan Award for Leadership and Excellence in a Field of Knowledge 2016, and the NASA Exceptional Engineering Achievement Award 2017.


Pablo has been involved with the EMC/Mag design and testing for all JPL missions since the mid-1980s starting with Galileo. With the focus on radar missions with sensitive instruments (CloudSat, Aquarius/SAC-D, Soil Moisture Active Passive or SMAP, JASON series, Surface Water and Ocean Topography or SWOT, NASA-ISRO Synthetic Aperture Radar or NISAR) and missions with magnetometers (Galileo, Ulysses, Cassini, Juno, Insight, Europa Clipper, Psyche), his expertise is crucial to enable these sensitive instruments to acquire their science within the context of an observatory system. In particular for Europa Clipper, the combination of fluxgate and vector helium magnetometers on ICEMAG, the Plasma Instrument for Magnetic Sounding (PIMS) and the Radar for Europa Assessment and Sounding: Ocean to Near-surface or REASON radar (in addition to a large array of solar panels and batteries) makes the EMC/Mag design for that mission very complex. 

Location Building: Advanced Test Equipment Rentals

10401 Roselle St, San Diego, CA    

Agenda 6:00 - 6:30 refreshments, Networking
6:30 - presentation
wrap up by 8:00 pm

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