An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere

Details An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....6484g&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #6484

Physics

Scientific paper

On November 5, 2002, the Galileo spacecraft, which is in orbit around Jupiter, made a pass in to a radial distance of 1.98 RJ (Jovian radii) from Jupiter, much closer than on any previous orbit. Data were successfully acquired during the entire inbound pass through the hot and cold plasma torii, and through the region inside the cold torus to a radial distance of 2.32 RJ, at which point the data system went into safing due to the intense radiation in the inner region of the magnetosphere. The purpose of this paper is to give an overview of the results obtained from the plasma wave investigation during this pass, which is designated A34. As on previous passes through the Io plasma torus a narrowband electrostatic emission at the upper hybrid resonance frequency provided a very accurate measurement of the electron density. The peak electron density, 2.6 x 103 cm-3, occurs just before the inner edge of the hot torus, which is at 5.62 RJ. As the spacecraft enters the cold torus the electron density drops to about 6.0 x 102 cm-3 and then gradually increases as the spacecraft approaches Jupiter, reaching a peak of about 2.5 x 103 cm-3 at 4.86 RJ, shortly before the inner edge of the cold torus. At the inner edge of the cold torus, which occurs at 4.76 RJ, the electron density drops dramatically to levels on the order of 1 cm-3. The electron density in this inner region is difficult to interpret because the upper hybrid emission can no longer be clearly identified, and there are numerous narrowband emissions with cutoffs that may or may not be associated with the local electron plasma frequency. As in the hot torus, the low density region inside the cold torus has a persistent level of plasma wave noise below about 103 Hz that is tentatively interpreted as whistler mode noise. The intensity of the whistler mode noise increases noticeably as the spacecraft crosses Thebe's orbit at 3.1 RJ, and increases markedly as the spacecraft crosses Amalthea's orbit at 2.6 RJ. The wideband waveform data show considerable evidence of dust impacts at radial distances inside of about 3 RJ, at rates as high as a few impacts per second.

Affiliated with

Also associated with

No associations

Rating

An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An overview of plasma wave observations obtained during the Galileo A34 pass through the inner region of the Jovian magnetosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-843439