HR: 1330h
AN: SM22B-0250    [PDF]
TI: Applications of High Etendue Line-Profile Spectroscopy and Spectro-Polarimetry to the Study of the Atmospheric and Magnetospheric Environments of the Jovian Icy Moons.
AU: * Harris, W
EM: wharris@sal.wisc.edu
AF: University of Washington, Dept. of Earth and Space Sciences 360 Johnson Hall, Seattle, WA 90195
AU: Roesler, F
EM: roesler@wisp.physics.wisc.edu
AF: University of Wisconsin, Dept. of Physics 1150 University Ave., Madison, WI 53706
AU: Harlander, J
EM: jmharlander@stcloudstate.edu
AF: St. Cloud State University, Dept. of Physics 145 Math and Science Bldg., St. Cloud, MN 56301
AU: Oliversen, R
EM: ron@midnight.gsfc.nasa.gov
AF: Goddard Space Flight Center, Lab. for Astro. & Solar Phys. Code 681, Greenbelt, MD 20771
AU: Mierkiewicz, E
EM: emierk@wisp.physics.wisc.edu
AF: University of Wisconsin, Dept. of Physics 1150 University Ave., Madison, WI 53706
AU: Ballester, G
EM: gilda@vega.lpl.arizona.edu
AF: University of Arizona, Lunar and Planetary Laboratory 1040 E. 4th. St, Tucson, AZ 85721
AU: Morgenthaler, J
EM: jpmorgen@midnight.gsfc.nasa.gov
AF: Goddard Space Flight Center, Lab. for Astro. & Solar Phys. Code 681, Greenbelt, MD 20771
AU: Corliss, J
EM: corliss@wisp.physics.wisc.edu
AF: University of Wisconsin, Dept. of Physics 1150 University Ave., Madison, WI 53706
AB: Conditions in the close vicinity of the Jovian icy moons are determined by a complex mix of processes beginning with the production of a tenuous atmosphere from sputtering, evaporative, and possibly tectonic/volcanic sources, extending outward to an exosphere that interacts with ions and neutrals trapped in the massive Jovian magnetosphere. This environment can be very dynamic and strongly dependent on external factors including the density and energy distribution of plasma and neutrals in the jovian corona and that nature of the connection of the jovian magnetosphere to Jupiter and the external solar environment. An understanding of this environment requires specific knowledge of the brightness, distribution and dynamics of all of the different system elements. For the JIMO mission, a UV spatial heterodyne spectroscometer (UVSHS) instrument would provide a degree of sensitivity to atmospheric and coronal emissions that has previously been unobtainable from remote spacecraft where the mass and volume budgets are too limited to support large telescopes. We present here an initial design for a JIMO includes a three channel instrument at the focal plane of a small 20 cm aperture telescope-polarimeter combination that targets FUV emissions from satellite atmospheres, the jovian coronal and Jupiter's airglow and aurora. Because these features are spatially extended from the vantage point of the JIMO instrument and require both high etendue (due to their low surface brightness or the need for photometric precision in polarimetry) and high spectral resolution (to map velocities in the 1-10 km/sec range) to study in detail, the SHS technique is ideally suited to study them.
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
DE: 2720 Energetic particles, trapped
DE: 2756 Planetary magnetospheres (5443, 5737, 6030)
DE: 2794 Instruments and techniques
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting