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Topic: TIMED (Thermosphere Ionosphere Mesosphere Energetics and Dynamics)

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In the News (Sun 21 Apr 19)

  Ionosphere - Wikipedia, the free encyclopedia
The ionosphere is the part of the atmosphere that is ionized by solar radiation.
At the same time, however, an opposing process called recombination begins to take place in which a free electron is "captured" by a positive ion if it moves close enough to it.
When a radio wave reaches the ionosphere, the electric field in the wave forces the electrons in the ionosphere into oscillation at the same frequency as the radio wave.
en.wikipedia.org /wiki/Ionosphere   (2840 words)

 Atmospheric sciences - Biocrawler   (Site not responding. Last check: 2007-11-03)
Atmospheric sciences is an umbrella term for the study of the atmosphere, its processes, the effects other systems have on the atmosphere, and the effects of the atmosphere on these other systems.
Meteorology includes atmospheric chemistry, atmospheric physics, and atmospheric dynamics with a major focus on weather forecasting.
Climatology is the study of atmospheric changes (both long and short-term) that define average climates and their change over time, due to both natural climate variability and anthropogenic climate variability or global warming.
www.biocrawler.com /encyclopedia/Atmospheric_sciences   (210 words)

 TIMED (Thermosphere Ionosphere Mesosp... Encyclopedia Articles @ LaunchBase.org (Launch Base)   (Site not responding. Last check: 2007-11-03)
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www.launchbase.org /encyclopedia/TIMED_(Thermosphere_Ionosphere_Mesosp...   (77 words)

 Community Service
Anne Smith, member of Science Team for TIMED (Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics) Satellite, NASA
Radiation scattered from the pencil beam of the transmitting radar as it penetrates weather targets can be detected at the receive-only sites as well as the transmitter.
In a bistatic system, the location of the targets in Cartesian space can be calculated from the pointing angle of the transmitting antenna and the time between transmission of a radar pulse from the transmitter and detection at a passive receiver site.
www.ncar.ucar.edu /ASR99/comser.html   (5466 words)

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