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--- jive_in_nm [2025/09/17 19:35] – [Details of the Instrument] jasonj
+++ jive_in_nm [2025/09/17 19:36] (current) – [Details of the Instrument] jasonj
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 No such Jovian ground-based instrument with these capabilities exists, nor does one for current or planned space missions to the giant planets. JIVE is an imaging spectrometer specifically designed to help achieve the scientific goals of this project and to meet these technical specifications. It will measure the Doppler shift in solar absorption lines from light that is reflected by clouds in Jupiter's upper troposphere, providing spatially resolved line-of-sight velocity images of the whole planet at that altitude. More precisely, JIVE is a Fourier transform tachometer that will simultaneously produce a visible image and a Doppler-velocity image of the planet at a regular temporal interval.
-{{:wiki:jive:jupiter2.mp4?direct&300 | Europa and Jupiter. Credit: Sean Sellers}}
+{{:wiki:jive:jupiter2.mp4?direct&350 | Europa and Jupiter. Credit: Sean Sellers}}
 Jovian oscillation periods and wavelengths dictate the rate and resolution that JIVE samples the surface velocity. Thus, JIVE is designed to provide Doppler-velocity images every 1 minute with a spatial resolution of about 1 arcsec (dependent on seeing), corresponding on average to about 3000 km on Jupiter (diameter of 140,000 km), or about 6000 km on Saturn (diameter of 120,000 km). The velocity images will be used to compute seismic observables like power spectra for mode identification, and can be averaged to obtain a latitudinal profile of winds sensitive to 1-2 m/s fluctuations.