An Observing Program for Examining the Causal Relationship Between Atmospheric Gravity Waves and Anomalous Refraction

Details An Observing Program for Examining the Causal Relationship Between Atmospheric Gravity Waves and Anomalous Refraction An Observing Program for Examining the Causal Relationship Between Atmospheric Gravity Waves and Anomalous Refraction

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1128t&link_type=abstract

American Astronomical Society, AAS Meeting #211, #11.28; Bulletin of the American Astronomical Society, Vol. 39, p.749

Astronomy and Astrophysics

Astronomy

Scientific paper

Anomalous refraction is a systematic large angular scale (degrees) quasi-periodic astrometric displacement observed in drift-scan astrometric observations that is hypothesized to be caused by internal waves in the lower atmosphere. This effect has been observed by astrometrists for over a century, but its cause and impact on ground-based astrometric measurements have never been fully understood. We are currently conducting an observing program designed to characterize atmospheric gravity waves as a source of anomalous refraction. Simultaneous drift-scan observations with multiple dissimilar telescopes and temporally resolved data from a specially designed microbarograph array allow direct observation of both atmospheric gravity wave activity and the anomalous refraction effect, providing observational evidence for the causal relationship between these phenomena. Results from preliminary observations made at the US Naval Observatory, Flagstaff Station show the potential of this observing technique.

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