| Type |
Journal Article |
| Names |
S. M. Nossal, E. J. Mierkiewicz, F. L. Roesler, R. J. Reynolds, L. M. Haffner |
| Publication |
Journal of Atmospheric and Solar-Terrestrial Physics |
| Volume |
68 |
| Issue |
13 |
| Pages |
1553-1575 |
| Date |
September 1, 2006 |
| Short Title |
Geocoronal hydrogen studies using Fabry Perot interferometers, part 2 |
| URL |
http://adsabs.harvard.edu/abs/2006JASTP..68.1553N |
| Library Catalog |
NASA ADS |
| Abstract |
Long-term data sets are required to investigate sources of natural
variability in the upper atmosphere. Understanding the influence of
sources of natural variability 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 Balmer α 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
mid-latitude geocoronal Balmer α column emission data set now
spanning two solar cycles and taken mainly from Wisconsin and Kitt Peak,
Arizona. We also discuss results and outstanding challenges for
increasing the accuracy and use of these observations. |