Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa23b..07p&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA23B-07
Physics
9820 Techniques Applicable In Three Or More Fields, 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition
Scientific paper
The far ultraviolet is commonly taken to be that spectral range from 115 nm to 185 nm. This definition reflects the practical nature and origin of the measurement technique. The short wavelength cut-off is defined by the transmittance cut-off of window materials (about 115 nm). The long wavelength end of the region is defined by the desire to exclude the orders-of-magnitude brighter signal at around 195 nm, which, happily, coincides with the fall-off in CsI photocathode efficiency at around 185 nm. The FUV allows us to probe the atmosphere down to about 130 km (as low as 80 km in H Lyman alpha). In this paper I will discuss what we have learned by using a novel imager, GUVI, on TIMED to study the ionosphere-thermosphere (IT) system, how we see the IT coupled to geospace and the solar input, and what we can learn from a future FUV system. In particular, I want to stress that FUV remote sensing is an important COMPONENT of a complete system for exploring the connections between the Sun, geospace, and the IT system. To that end, I will briefly discuss how those data need to be integrated into a virtual observatory that will enable new investigations into the near-Earth environment.
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