Events

January 9, 2024 11:00 - 12:00 EST

A Brief Description of the JPL Uranian Radiation Model (UMOD)

Webinar Zoom Link

Presenter: Dr. Henry Garrett & Insoo Jun (Caltech/NASA JPL)
This talk describes a comprehensive radiation model (UMOD) of the Uranian environment for JPL mission planning. It defines the high energy electron (0.022-2.5 MeV) and proton (0.028-3.5 MeV) flux environments and the magnetic field at Uranus that can be used for spacecraft or instrument design. The data are based on the Voyager 2 Cosmic Ray Subsystem Electron Telescope and the Applied Physics Laboratory Low Energy Charged Particle Detector. B-L coordinates are for the Q3 magnetic field model. The model (as are models for Jupiter, Saturn, and Neptune) is available on-line and as a compiled version from JPL.

Registration not yet open.

Questions? Jodi.Berdis@jhhuapl.edu

Related Documents:

• Ice Giants Seminar Series Connection Information.pdf

April 9, 2024 11:00 - 12:00 EDT

The Ever-changing Ionosphere of Uranus

Webinar Zoom Link

Presenter: Dr. Henrik Melin (University of Leicester)
Abstract: The upper atmosphere of the giant planets has two principal components, the neutral thermosphere and the charged particle ionosphere, with the latter acting as an important interface between the magnetosphere and the underlying atmosphere. Emissions from the ionospheric ion H3+ can be observed in the near-infrared, and via spectral analysis we can determine the temperature of the upper atmosphere and the density of the ions. H3+ was first detected at Uranus in 1992, and it has been observed using a variety of ground-based telescopes since. Analysis of all available observations have shown that the upper atmosphere has been slowly cooling on time-scales of decades, at a rate of about 8 K/year, and the reason for this remains largely unknown, and is not seen at either Jupiter or Saturn. As the upper atmosphere cools, H3+ emissions are becoming weaker, and the observations require longer and longer exposure times. Luckily, however, we have recent observations from the James Webb Space Telescope which greatly help our understanding of this enigmatic planet. In this seminar, I will discuss our current understanding of the ionosphere of Uranus, and explore opportunities for future missions to investigate the processes that occur in the upper atmosphere.

Registration not yet open.

Questions? mallory.kinczyk@jhuapl.edu

Related Documents:

• Ice Giants Seminar Series Connection Information.pdf

May 8, 2024 11:00 - 12:00 EDT

Cool Joules: Remote Sensing of the Ice Giants in the Thermal Infrared

Webinar Zoom Link

Presenter: Dr. Conor Nixon (NASA Goddard)

Registration not yet open.

Questions? mallory.kinczyk@jhuapl.edu

Related Documents:

• Ice Giants Seminar Series Connection Information.pdf