Evaluation of ionospheric effects on SAR interferometry in Antarctica

• Autorzy: Al Bayari, O.
• Konferencja: 6th Geodetic Millenium Meeting Poland-Italy (6; 29.06-1.07.2000; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

The influence of atmospheric inhomegeneities on SAR signal has been recently investigated by several authors with interest particularly focused on the tropospheric layer, that is modelled starting from tbe main meteorological parameters observed on site. Phase shift due to the propagation of waves through the medium (troposphere and ionospbere) can be misinterpreted as deformation processes or topographical effects on the interferogramme from SAR image pairs. This paper deals with the influences of the dispersive ionospheric layer on SAR signal in Antarctica. The phenomenon is highly variable in time and space, due to the vicinity of the geomagnetic pole and is directly related to the Total Electron Content (TEC) values. Quantitative information on TEC values, at the time of the interferometrie images pair acquisition from the radar sensor, can be eventually obtained from locally acquired GPS measuremcnts or by ionospheric sounding. The magnitude of phase shift and the possible presence of "ionospheric" fringes can be then estimated.

Słowa kluczowe

PL

jonosfera; metody badawcze

EN

ionospheric effects; scientific research

• Czasopismo: Reports on Geodesy
• Rocznik: 2000
• Tom: z. 8/54
• Strony: 24-31
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Al Bayari, O.

• DISTART University of Bologna Italy