Title :
Mapping the Ionosphere Using L-Band SAR Data
Author :
Nicoll, Jeremy B. ; Meyer, Franz J.
Author_Institution :
Univ. of Alaska Fairbanks, Fairbanks, AK
Abstract :
The influence of the ionosphere on spaceborne SAR signals can be significant, especially approaching wavelengths at L-band or larger. By measuring these effects and inverting the underlying physical model, these effects can be used to measure and map aspects of the ionosphere. ALOS PALSAR data is employed to demonstrate this capability. Single-pol data is used to determine second-order gradients of the iononsperic Total Electron Content (TEC) (the second derivative of intensity). Dual-pol can yield lateral TEC variations in homogeneous areas. Finally, Faraday rotation measurements from full-pol data can be used to create 2-D maps of the absolute TEC.
Keywords :
ionosphere; synthetic aperture radar; 2D maps; ALOS PALSAR data; Faraday rotation measurements; TEC; dual-pol data; iononsperic Total Electron Content; ionosphere mapping; physical model; second-order gradients; single-pol data; spaceborne L-Band SAR signals; Azimuth; Electrons; Equations; Geomagnetism; Ionosphere; L-band; Magnetic fields; Satellite broadcasting; Spaceborne radar; Wavelength measurement; ionospheric effects; polarimetric SAR calibration; total electron content;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779047
