Statistical Analysis of High-Resolution Coherent Monopulse Radar Sea Clutter

A statistical analysis that properly characterizes sea clutter processes is indispensable both for optimum detection algorithm design and for performance prediction problems in maritime surveillance applications. In this paper, we present the statistical analysis of experimental sea clutter data collected by a high-resolution coherent monopulse radar. First, we present the amplitude statistical analyses for these clutter data. The results show that the K, Pareto, and CIG distributions can each provide good fits to the clutter data for three channels of monopulse radar. The analyses on the variations of the K distribution parameters with range suggest that the scale parameter is closely associated with the clutter powers and that the shape parameter is influenced by the sea state. Then, we focus on the correlation properties. The averaged results suggest that the temporal and spatial correlation properties are similar for the clutter of all three channels. Moreover, the clutter between the sum and difference channels is almost completely correlated in elevation and is lowly correlated in azimuth. Finally, we perform a spectral analysis, highlighting the temporal and spatial variabilities of Doppler spectra. It is found that the individual Doppler spectra in all three channels can be represented by Gaussian-shaped power spectral densities, and their centroid and width can be modeled as two separate stage linear functions of spectrum intensity

Reports to the President

A compilation of annual reports for the 1999-2000 academic year, including a report from the President of the Massachusetts Institute of Technology, as well as reports from the academic and administrative units of the Institute. The reports outline the year's goals, accomplishments, honors and awards, and future plans

Globalisation and Governance in the Pacific Islands

Politics and government; Globalization; Congresses; Oceani

Unequal Lives

As we move further into the twenty-first century, we are witnessing both the global extensification and local intensification of inequality. Unequal Lives deals with the particular dilemmas of inequality in the Western Pacific. The authors focus on four dimensions of inequality: the familiar triad of gender, race and class, and the often-neglected dimension of generation. Grounded in meticulous long-term ethnographic enquiry and deep awareness of the historical contingency of these configurations of inequality, this volume illustrates the multidimensional, multiscale and epistemic nature of contemporary inequality. This collection is a major contribution to academic and political debates about the perverse effects of inequality, which now ranks among the greatest challenges of our time. The inspiration for this volume derives from the breadth and depth of Martha Macintyre's remarkable scholarship. The contributors celebrate Macintyre’s groundbreaking work, which exemplifies the explanatory power, ethical force and pragmatism that ensures the relevance of anthropological research to the lives of others and to understanding the global condition