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The Io Input/Output observatory (IoIO): Near real-time monitoring of the release of material from Io and its supply to the Jovian magnetosphere — context for Io volcanic, atmospheric, and Jovian magnetospheric studies

Presentation #103.06 in the session Fire and Ice: Io and Beyond (Oral Presentation)

Published onOct 23, 2023
The Io Input/Output observatory (IoIO): Near real-time monitoring of the release of material from Io and its supply to the Jovian magnetosphere — context for Io volcanic, atmospheric, and Jovian magnetospheric studies

We present the largest collection of contemporaneously recorded Jovian sodium nebula and Io plasma torus (IPT) images assembled to date. Observations are recorded by the Planetary Science Institute’s 35 cm Io Input/Output observatory (IoIO). Our narrow-band coronagraphic imaging of the Na nebula and IPT began March 2017 and has been conducted on a near-nightly basis over each subsequent 7-month Jovian opposition period. Observations on a ~10 minute cadence have been recorded on over 550 nights, resulting in a dataset with over 10,000 images. The IoIO dataset provides a comprehensive record of the departure of material from Io’s atmosphere and its supply to Jupiter’s magnetosphere. This makes the data an excellent complement to studies of the processes that release material from Io’s surface and transport it through its atmosphere. The data also provide critical context to Juno and supporting observations of Jupiter’s magnetosphere and aurorae. Because observations are ongoing and reduced within 24 hours of being recorded, IoIO is able to provide timely alerts concerning enhancements in material escape from Io to inform spacecraft operations and Earth-based target-of-opportunity programs.

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