Julia radar studies of electric fields in the equatorial electrojet

• Autores: Hysell, D.L., Larsen, M.F., Woodman Pollitt, Ronald Francisco
• Formato: artículo
• Fecha de Publicación: 1997
• Institución: Instituto Geofísico del Perú
• Repositorio: IGP-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.igp.gob.pe:20.500.12816/593
• Enlace del recurso: http://hdl.handle.net/20.500.12816/593; https://doi.org/10.1029/97GL00373
• Nivel de acceso: acceso abierto
• Materia: Electric currents; Electric fields; Interferometry; Radar measurement; Radar systems; Atmospheric electricity; Ionosphere; Radar; http://purl.org/pe-repo/ocde/ford#1.05.01

First results from the JULIA radar at Jicamarca are presented. These include coherent scatter observations of the equatorial electrojet and of 150-km echoes. Interferometry is used to measure the zonal drift rate of kilometer scale waves in the electrojet as functions of altitude. A technique for estimating the background zonal electric field from the interferome­try data is described. The electric field estimates can be calibrated against the Doppler speed of the 150-km echoes when the latter are present. The kilometer-scale wave drifts sometimes exhibit large-amplitude, periodic height variations with vertical wavelengths of about 10 km. These signatures are reminiscent of the wind pro­files measured with chemical release techniques in the lower thermosphere during the Guará campaign.