Initial Observations from a Narrow-Field Ionospheric Airglow Imager at the Cerro Tololo Inter-American Observatory

Details Initial Observations from a Narrow-Field Ionospheric Airglow Imager at the Cerro Tololo Inter-American Observatory Initial Observations from a Narrow-Field Ionospheric Airglow Imager at the Cerro Tololo Inter-American Observatory

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa33a0260m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA33A-0260

Physics

2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 7944 Ionospheric Effects On Radio Waves

Scientific paper

In August 2006, a miniaturized narrow-field ionospheric airglow imager was installed at the Cerro Tololo Inter- American Observatory (CTIO) east of La Serena, Chile (-29.9 N, 288.7 E geo; -16.46 N, 0.0388 E mag), in order to observe irregularities associated with equatorial spread-F. Two GPS L1 scintillation monitors were also installed to study the characteristics of the irregularities at the GPS Fresnel size. The imager looks north parallel to the Earth's magnetic field in the ionosphere towards the magnetic equator. By doing so, the imager can observe small-scale structure mapped along the magnetic field lines from the equatorial ionosphere to the local ionosphere. Initial observations include secondary instabilities, bifurcations, and kilometer-scale structure. Coordination with an all-sky imager near the CTIO magnetic conjugate point in Villa de Leyva, Colombia (5.57 N, 287.37 E geo; 17.79 N, -0.125 E mag), and the Jicamarca incoherent-scatter radar near Lima, Peru (-11.95 N, 283.13 E geo; 0.616 N, -5.39 E mag), are anticipated in the near future. In this way, we will be able to study the entire flux-tube geometry associated with the development of equatorial instabilities and investigate the relative roles of the equatorial and local, off-equatorial ionospheres in the severity of these scintillation-causing irregularities.

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