Insuring Data Quality in Long Term Observations of Geocoronal Hydrogen Emissions

Details Insuring Data Quality in Long Term Observations of Geocoronal Hydrogen Emissions Insuring Data Quality in Long Term Observations of Geocoronal Hydrogen Emissions

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsa52a..06n&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SA52A-06

Physics

0310 Airglow And Aurora, 0355 Thermosphere: Composition And Chemistry, 0394 Instruments And Techniques, 1650 Solar Variability, 1694 Instruments And Techniques

Scientific paper

Long term data sets are required to investigate sources of natural variability in the upper atmosphere. Understanding the influence of sources of natural variaibility such as the solar cycle is needed to characterize the thermosphere + exosphere, to understand coupling processes between atmospheric regions, and to isolate signatures of natural variability from those due to human caused change. Multi-year comparisons of thermospheric + exospheric H-alpha emissions require cross-calibrated and well-understood instrumentation, a stable calibration source, reproducible observing conditions, separation of the terrestrial from the galactic emission line, and consistent data analysis accounting for differences in viewing geometry. We discuss how we address these criteria in the acquisition and analysis of a midlatitude geocoronal H-alpha column emission data set now spanning two solar cycles and taken mainly from Wisconsin and Kitt Peak, Arizona. These data show a statistically significant variation over the solar cycle with higher intensities observed during solar maximum conditions. We also discuss results and outstanding challenges for increasing the accuracy and use of these observations.

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