TY - GEN
T1 - Electromagnetic wave scattering from ocean surface at low grazing angles
AU - Sajjad, Naheed
AU - Khenchaf, Ali
AU - Coatanhay, Arnaud
PY - 2009/1/1
Y1 - 2009/1/1
N2 - Bragg scattering is widely recognized as the dominant mechanism at moderate incident angles, by which the ocean surface backscatters microwave radiation. In this paper we have shown that the validity domain of the Bragg/composite surface theory can be extended to low grazing angles by taking into account the contribution of second order scattering effects into the first order at small scale. An improved two scale model (TSM) has been investigated at low grazing angles for (radar frequencies) L-, C- and Ku-band with wind speeds of 7m/s and 15m/s. It is observed that for higher wind speeds the intensity of σHH increases up to 8 dB. In backscattering configuration predictions of the model are compared with the experimental data at Ku-band. Comparison shows good agreement at higher wind speeds. Finally, we use the improved TSM to predict the sea scattering in bistatic configuration and compare the results with classical TSM.
AB - Bragg scattering is widely recognized as the dominant mechanism at moderate incident angles, by which the ocean surface backscatters microwave radiation. In this paper we have shown that the validity domain of the Bragg/composite surface theory can be extended to low grazing angles by taking into account the contribution of second order scattering effects into the first order at small scale. An improved two scale model (TSM) has been investigated at low grazing angles for (radar frequencies) L-, C- and Ku-band with wind speeds of 7m/s and 15m/s. It is observed that for higher wind speeds the intensity of σHH increases up to 8 dB. In backscattering configuration predictions of the model are compared with the experimental data at Ku-band. Comparison shows good agreement at higher wind speeds. Finally, we use the improved TSM to predict the sea scattering in bistatic configuration and compare the results with classical TSM.
KW - Horizontal polaization
KW - Low grazing angles
KW - Sea surface scattering
KW - Two scale model
UR - https://www.scopus.com/pages/publications/77950931358
U2 - 10.1109/IGARSS.2009.5416887
DO - 10.1109/IGARSS.2009.5416887
M3 - Conference contribution
AN - SCOPUS:77950931358
SN - 9781424433957
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - I196-I199
BT - 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2009 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2009
Y2 - 12 July 2009 through 17 July 2009
ER -