HR: 11:50h
AN: SF52A-07    [Abstracts]
TI: The Application of Rapidly-Sampled GPS Signal Amplitudes to Remote Sensing of Ionospheric Irregularities
AU: * Ledvina, B M
EM: bml22@cornell.edu
AF: School of Electical and Computer Engineering, Cornell University, Ithaca, NY 14853 United States
AU: Kintner, P M
EM: pmk1@cornell.edu
AF: School of Electical and Computer Engineering, Cornell University, Ithaca, NY 14853 United States
AU: Makela, J J
EM: jmakela@ssd5.nrl.navy.mil
AF: E.O. Hulburt Center for Space Research, Code 7607, Naval Research Laboratory, Washington, DC 20375 United States
AB: Cornell University has developed a GPS scintillation receiver in which the amplitude and phase of the L1 GPS signal can be measured at up to 50 samples per second. This capability enables a variety of measurements and experiments to remotely sense properties of the disturbed ionosphere. Fast variations in the GPS signal are primarily produced by a diffractive process whose source is Fresnel-scale-length electron density irregularities. These variations can be used to infer ionospheric drift velocities, the scattering heights, and the spatial and temporal properties of the scintillation patterns. In addition these receivers can be used in conjunction with other remote sensing instruments such as imagers, radar, and ionosondes to understand the origin, life-time, and dynamics of the irregularities. We will present examples estimating ionospheric drift velocities, scattering heights, irregularity decay rates, and the size, shape, orientation, and time-scale of scintillation patterns.
DE: 4556 Sea level variations
DE: 2447 Modeling and forecasting
DE: 1242 Seismic deformations (7205)
DE: 1640 Remote sensing
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting