The Naval Research Laboratory has recently begun a new basic research program designed to lay the foundation for future Navy applications of high-resolution polarimetric and polarimetric-interferometric radar systems. Despite many years of research, there is a serious lack of high-resolution, polarimetric ocean backscatter data in the radar community from which to fuel advanced applications, su...

In this paper, we present the Synchronous Impulse Reconstruction Radar (SIRE) Ultra-wideband (UWB) radar designed by the Army Research Lab (ARL) for landmine and improvised explosive device (IED) detection as a 2 by 16 MIMO radar (with collocated antennas). Its improvement over its SIMO counterpart in terms of beampattern/cross range resolution are discussed and demonstrated using simulated dat...

Radar offers advantages as a robotic perception modality because it is not as vulnerable to the vacuum, dust, fog, rain, snow and light conditions found in construction, mining, agricultural and planetary-exploration environments. However radar has shortcomings such as a large footprint, sidelobes, specularity effects and limited range resolution—all of which result in poor environment maps. Ev...

In this paper, we present the Synchronous Impulse Reconstruction Radar (SIRE) Ultra-wideband (UWB) radar designed by the Army Research Lab (ARL) for landmine and improvised explosive device (IED) detection as a 2 by 16 MIMO radar (with collocated antennas). Its improvement over its SIMO counterpart in terms of beampattern/cross range resolution are discussed and demonstrated using simulated dat...

Radar detection and identification of ground targets in diverse environments is a subject of continuing interest. It has long been known that different radar bands have advantages for different environmental conditions. For example, it has been shown that detection of targets under foliage is more easily accomplished using longer wavelength radars since there is less attenuation at these freque...

The performance and capabilities of a bistatic spaceborne synthetic aperture radar (SAR) are analyzed, where the transmitter and receiver are in different orbits. Such a configuration may be optimized for a broad range of applications like frequent monitoring, wide swath imaging, single-pass crosstrack interferometry, along-track interferometry, resolution enhancement or radar tomography.

Short Abstract — This article demonstrates some improvements of a basic M-Sequence approach for ultra wideband (UWB) high resolution radar. These improvements consist of the enhancement of equivalent sampling rate and an improvement of the overall measurement bandwidth. The presented method permits the omission of RF anti-aliasing filters, which drastically increases the operational flexibility...

The importance of considering the spatial distribution of rainfall for process-oriented hydrological modelling is well-known. However, the application of rainfall radar data to provide such detailed spatial resolution is still under debate. In this study the process-oriented TAC (Tracer Aided Catchment model, Distributed) model had been used to investigate the effects of different spatially dis...

Soil moisture is a critical hydrological variable that links the terrestrial water, energy and carbon cycles. Global and regional observations of soil moisture are needed to estimate the water and energy fluxes at the land surface, to quantify the net carbon flux in boreal landscapes, to enhance weather and climate forecast skill and to develop improved flood prediction and drought monitoring c...

Nearly two years of 2-min resolution data and 7to 21-s resolution data from the CUTLASS Finland HF radar have undergone Fourier analysis in order to study statistically the occurrence rates and repetition frequencies of pulsed ionospheric ̄ows in the noon-sector high-latitude ionosphere. Pulsed ionospheric ̄ow bursts are believed to be the ionospheric footprint of newly reconnected geomagnetic ...