The Met Office routinely runs a global spectral wave model providing analyses and forecasts of sea state on a grid spacing of approximately 60 km. The modelled two-dimensional wave energy spectra are compared with the Advanced Synthetic Aperture Radar (ASAR) Envisat satellite observations on a daily basis. Comparisons are also made with frequency ocean wave energy spectra observed by a moored b...

During its development years, geophysical survey has served field archaeology by defining possible sites underground, prior to excavation or preservation. Now we can see the art taking off as a research method in its own right. After summarising some recent research applications of magnetic mapping, the author gives us three case studies from USA and Jordan, where groundpenetrating radar (GPR) ...

The Radar Absorption Material (RAM) method is a coating for reducing the energy of electromagnetic waves received by converting emitted radar into heat energy. Hemp has been studied to have strongest and most stable tensile characteristics 5.5 g/den higher resistance compared other natural fibers. Combining hemp with alumina powder (Al2O3) epoxy resin could provide stealth technology system tha...

Structural radar absorber has important application in stealth field for its ability to effectively absorb incoming wave and bear the load at same time. Metasurface absorbers can achieve nearly-perfect absorption of wave, have characteristics light weight thin structure, but their bandwidth are usually narrow. To solve this problem, a new method broadening metasurface is proposed work. With var...

Global Precipitation Measurement (GPM) is poised to be the next generation precipitation observations from space after the TRMM mission. The GPM will carry a dual-frequency precipitation radar (DPR), operating at Ku and Ka band frequencies. Since space-borne precipitation observations have never been done in Ka band before, extensive research work on dualfrequency radar, including electromagnet...

This paper explores the use of millimeter-wave (MMW) scanning radar for control and safeguarding during spacecraft descent and landing. The essay compares radar characteristics such as beam width, agility and range accuracy, against sensing requirements for a specific descent and landing scenario. While the study discussed here presents the advantages of agile motion-free scanning radar for map...

Active microwave radar satellites transmit and receive radar signals with wavelengths in the range of centimeters to one meter thus measuring the roughness of the sea surface, which enables the retrieval of wind and ocean wave fields. Synthetic Aperture Radars (SAR) are capable of imaging synoptic wind fields with a coverage of up to 500 km x 500 km and a resolution of down to 100 m. As the rad...

We study the problem of gathering information about wind velocity from continuous-wave clear-air Doppler radar measurements. The radar is assumed to be a monostatic fixed-frequency Doppler radar, and the wind velocity as well as the reflectivity are modeled as random fields with statistical parameters depending on the altitude. We seek to reconstruct the hodograph curve of the wind profile, i.e...

This paper is concerned with the Simultaneous Localization And Mapping (SLAM) problem using data obtained from a microwave radar sensor. The radar scanner is based on Frequency Modulated Continuous Wave (FMCW) technology. In order to meet the needs of radar image analysis complexity, a trajectoryoriented EKF-SLAM technique using data from a 360◦ field of view radar sensor has been developed. Th...

Doppler radar can be implemented for sensing physiological parameters wirelessly at a distance. Detecting respiration rate, an important human body parameter, is essential in a range of applications like emergency and military healthcare environments, and Doppler radar records actual chest motion. One challenge in using Doppler radar is being able to monitor several patients simultaneously and ...