Stripmap mode SAR raw data generator for ocean scene with large squint angle
A procedure for synthetic aperture radar (SAR) raw data generation for time-variant ocean surface is proposed. The appropriate ocean reflectivity function that takes account of the electromagnetic-ocean wave interaction is transformed on to SAR raw signal based on the distributed surface (DS) model. An efficient and accurate simulation algorithm with time-domain integration along range dimension for squint SAR raw signal is adopted. Moreover, the ocean's dynamics is accounted by means of interpolation based on the dispersion relationship of the time-variant waves. Simulation results are presented to demonstrate the validity and applicability of the proposed techniques.
The side‐looking radar image of time‐variant scenes
The image formed by a side-looking radar system of a scene characterized by a temporally and spatially varying reflectivity density effectively distributed over a plane is given. The implied spectral density transformation, with its intrinsic distortion of the scene's wave number spectral density, is noted. In the remainder it is assumed that the temporal and spatial behaviors are connected via a dispersion relation. It is shown that the image is a linear, space-variant transformation of the scene at, say, t = 0, which can be described as the concantenation of three linear transformations: the first two are space-invariant, one being the system transformation for a time-invariant scene, and the third is space-variant and gives a geometric distortion, most simply a scaling and skewing, which is present in any system using a side-looking scan. Sufficient conditions are given for faithful imaging and spectral density mapping; those for the latter are more easily met.
Global Islamic Politics
1. Introduction to Islam and Islamic Revivals. 2. Islam: A Vehicle for Political Action. 3. The Muslim Fundamentalists. 4. The Muslim Traditionalists. 5. The Muslim Modernists. 6. The Muslim Pragmatists. 7. Failure of Secular Ideologies and Developmental Crises. 8. Islamic Revivalism in the Arab-Israeli Context. 9. OPEC, OIC, and Islamic Politics. 10. The Islamic Revolution in Iran. 11. Islamic Revival in Central Asia. 12. Conclusion. Glossary of Islamic Terms.