Associated RFAs:

1
FUV and EUV Imaging of the Thermosphere and
Ionosphere from GEO K. Wood and K. Dymond, NRL

• Science Objectives
• What is the prompt global-scale ionospheric
  response to geomagnetic storms?
• What are the extended responses of the
  thermosphere and the global scale ionosphere to
  geomagnetic storms?
• How do traveling ionospheric disturbances develop
  and propagate?
• What affects the day to day variability of the
  equatorial ionosphere?
• What are the temporal and spatial properties of
  high latitude upflows and outflows?

• Associated RFAs
• F2. Understand the plasma processes that
  accelerate and transport particles (Q4)
• F3. Understand the role of plasma and neutral
  interactions in nonlinear coupling of regions
  throughout the solar system (Q1,2,3)
• F3,Q3. How do the magnetosphere and the
  ionosphere-thermosphere systems interact with
  each other?
• H2. Determine changes in the Earths
  magnetosphere, ionosphere, and upper atmosphere
  to enable specification, prediction, and
  mitigation of their effects (Q13)
• H3. Understand the role of the Sun as an energy
  source to Earths atmosphere and, in particular,
  the role of solar variability in driving change
  (Q12)
• J4. Understand and characterize the space weather
  effects on and within planetary environments to
  minimize risk in exploration activities (Q3)

TIGRIST PI P. Kintner Institutions
Cornell, NRL, UC Berkeley Number of Spacecraft
1 Location Geosynchronous Attitude Control
3-axis stabilized Number of Instruments 1 or
2 Type of Instrument(s 2) UV Imagers, mostly
TRL9 Payload Resources Required 95 kg, offset
pointing Measurement Strategy FUV/EUV Imagery
at 10 km resolution (best case)

• Enabling and Enhancing Technology Developments
• High performance reflective filters for UV
• High performance microchannel-plate based
  detector systems
• Newly developed algorithms for inverting the UV
  radiances to produce neutral and ion densities
• Low cost, frequent access to GEO (presently
  limited to finding missions of opportunity,
  which are chiefly on communications satellites)