The Aeronomy of Ice in the Mesosphere (AIM) Satellite Mission

Computer Science – Performance

Scientific paper

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0305 Aerosols And Particles (0345, 4801, 4906), 0321 Cloud/Radiation Interaction, 0340 Middle Atmosphere: Composition And Chemistry, 3334 Middle Atmosphere Dynamics (0341, 0342)

Scientific paper

The Aeronomy of Ice in the Mesosphere (AIM) is a NASA Small Explorer mission currently near completion and preparing for launch. The overall goal is to resolve why Polar Mesospheric Clouds (PMCs) form and why they vary. By measuring PMCs and the thermal, chemical and dynamical environment in which they form, AIM will quantify the connection between these clouds and the meteorology of the polar mesosphere. This will provide the basis for the study of long term variability in the mesospheric climate and its relationship to global change. The results of AIM will be a rigorous validation of predictive models that can reliably use past PMC changes and present trends as indicators of global change. This goal will be achieved by measuring PMC occurrence frequencies, spatial distribution, and particle size distributions as well as gravity wave activity, cosmic dust influx to the atmosphere and precise, vertical profile measurements of temperature, H2O, OH, CH4, O3, CO2, NO, and aerosols. The AIM satellite has three instruments aboard: 1) Solar Occultation for Ice Experiment (SOFIE); 2) Cloud Imaging and Particle Size Experiment (CIPS); and 3) Cosmic Dust Experiment(CDE). This talk will summarize the science goals, measurement requirements, and the expected performance of the AIM instruments. AIM is scheduled for launch in September, 2006.

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