Abstract
Remote sensing of the Earth's atmosphere by viewing the limb provides a high sensitivity to trace gases because of the very long path lengths that are attainable. This makes the results insensitive to local contamination or wall effects which can cause significant systematic errors in in-situ sampling methods. The spatial resolution is, however, much poorer: Typically, the bulk of the absorbing gas along a limb path will be spread over a volume measuring 350 km horizontally and 2 km vertically.
© 1997 Optical Society of America
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