IVO: Io Volcano Observer
An image of Io, moon of Jupiter

IVO is a mission concept that will be dedicated to studying the Jovian moon Io, the most volcanically active world in the solar system.

The proposed design and payload will transform our understanding of this unique world and how tidal heating shapes planetary worlds across the cosmos.



The University of Arizona

Principal Investigator
Regents’ Professor Alfred McEwen
Science operations
potential student collaboration camera
United States Geological Survey

Deputy Principal Investigator
Dr. Laszlo Kestay
data processing
Johns Hopkins Applied Physics Laboratory
Mission and spacecraft design, build
and management; cameras;
Plasma Instrument for Magnetic Sounding (PIMS)
University of California

Dual fluxgate magnetometers
German Aerospace Center (DLR)

Thermal Mapper
University of Bern

Ion and Neutral Mass Spectrometer (INMS)
Jet Propulsion Laboratory

Radio science, navigation