Impacts of oil spills on altimeter waveforms and radar backscatter cross section

Impacts of Oil Spills on Altimeter Waveforms and Radar Backscatter Cross Section

Ocean surface films can damp short capillary-gravity waves, reduce the surface mean square slope, and induce ‘‘sigma0 blooms’’ in satellite altimeter data. No study has ascertained the effect of such film on altimeter measurements due to lack of film data. The availability of Environmental Response Management Application (ERMA) oil cover, daily oil spill extent, and thickness data acquired duri...

Cramér-Rao bounds for radar altimeter waveforms

The pseudo maximum likelihood estimator allows one to estimate the unknown parameters of Brown’s model for altimeter waveforms. However, the optimality of this estimator, for instance in terms of minimizing the mean square errors of the unknown parameters is not guarantied. Thus it is not clear whether there is some space for developing new estimators for the unknown parameters of altimetric si...

Synthetic Aperture Radar (SAR) Data Simulation for Radar Backscatter Cross-section Retrieval

High Resolution Imaging of the Ocean Surface Backscatter by Inversion of Altimeter Waveforms

All the satellite altimeters use pulse-limited-geometry and full-deramp technique to measure the power backscatter by the ocean surface as a function of time, i.e. the altimeter pulse echo waveform, see for example [1] for explanation on pulse limited altimeters). Assuming that the distribution of the sea surface roughness and elevation are homogeneous over the altimeter footprint, the backscat...

Monopole Antenna Radar Cross Section Reduction with Plasma Helix

In this paper, a new method for radar cross section reduction of a monopole antenna is proposed. In this method, a plasma helix like fluorescent bulbs is placed around the antenna element. The selected plasma parameter for this medium acts as an absorber without disturbing the antenna performance. The simulations show that radar cross section of simulated antenna is reduced in a wide frequency ...