Radar and optical observations of mesospheric wave activity during the lunar eclipse of 6 July 1982

Details Radar and optical observations of mesospheric wave activity during the lunar eclipse of 6 July 1982 Radar and optical observations of mesospheric wave activity during the lunar eclipse of 6 July 1982

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jatp...50...11a&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 50, Jan. 1988, p. 11-17, 19, 20. Research supported by the

Physics

6

Lunar Eclipses, Mesosphere, Radar Imagery, Visible Spectrum, Infrared Photometry, Interferometry, Signal Processing

Scientific paper

Simultaneous measurements were made using a 2.66 MHz interferometer radar, infrared photometers, and imaging systems during the total lunar eclipse of July 6, 1982. The radar data showed that a series of six discrete scatterers passed overhead at 103 km with an average spacing of 54 min, and two passed overhead at 88 km, also 54 min apart. The speed and period give a horizontal wavelength of 440 km, and the phase shift between 88 and 103 km activity suggests a 30 km vertical wavelength, in agreement with values for typical medium-scale traveling ionospheric disturbances (TIDs). Infrared images were made in the near infrared, and photometric measurements were made on and off the 8-3 band of OH. These observations showed wavelike structures appearing first over the radar, then further south unitl they filled most of the sky. The speed of development of the infrared structure pattern in the sky is consistent with the 135 m/s southward wave speed observed by the radar, but the structures themselves appeared in place, then drifted slowly northward at 10 m/s. The photographically determined wavelengths were 30-60 km, considerably shorter than the 440 km determined with the radar.

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