HR: 14:15h
AN: SA23A-02    [Abstracts]
TI: New topside measurements at Jicamarca
AU: * Hysell, D
EM: dlh37@cornell.edu
AF: Earth and Atmospheric Science, Cornell University, 2108 Snee Hall, Ithaca, NY 14853, United States
AU: Rodrigues, F
EM: fsr5@cornell.edu
AF: Earth and Atmospheric Science, Cornell University, 2108 Snee Hall, Ithaca, NY 14853, United States
AU: Chau, J
EM: jchau@jro.igp.gob.pe
AF: Jicamarca Radio Observatory, Instituto Geofisico del Peru, Apartado 13-0207, Lima, 13, Peru
AB: A new series of topside ionospheric measurements at Jicamarca incorporating full-profile analysis of long-pulse data are presently emerging. Full-profile analysis utilizes statistical inverse theory to estimate ionospheric parameters (plasma number density, temperature, and composition) simultaneously at all altitudes. Traditional range-gated analysis of long-pulse data is impractical at Jicamarca, where the long correlation time of the incoherent scatter invalidates important assumptions regarding homogeneity. Coded longpulse methods are often used at Jicamarca, but their sensitivity is limited by radar clutter, rendering them marginal during solar minimum conditions. Full profile analysis may be regarded as optimal, fully accounting for the effects of the radar instrument function, the complete error covariance matrix, and other experimental effects and biases in principle. The poor conditioning and mixed determined nature of the problem must be mitigated by regularization, however. Our technique is incorporates Faraday rotation data for absolute calibration. Validation necessitates spacecraft observations, including in situ (DMSP) and path-integrated (COSMIC, C/NOFS) measurements.
UR: http:landau.geo.cornell.edu
DE: 2415 Equatorial ionosphere
DE: 2467 Plasma temperature and density
DE: 2481 Topside ionosphere
DE: 2494 Instruments and techniques
SC: SPA-Aeronomy [SA]
MN: 2007 Joint Assembly