Science Seminars

6/06/2017 – Marzia Parisi, William Folkner; Juno gravity science experiment: early results

Speaker: Marzia Parisi, William Folkner (The Jet Propulsion Laboratory, Caltech)
Date: Sunday, Jun 06, 2021
Time: 4:00 PM
Location: SPSC W120

Seminar Abstract:

The Juno spacecraft entered orbit about Jupiter on July 5, 2016 with orbit period of 53 days. Doppler measurements of the Juno radio signal at periapsis (perijoves) are used to estimate the Jupiter gravity field in order to constrain models of the jovian interior and differential rotation. We report on the Doppler measurement accuracy and estimates of Jupiter’s gravity field from the first two dedicated gravity perijoves after orbit insertion. Different sets of estimated parameters have been studied in order to assess the stability of the gravity solution and obtain realistic uncertainties.