1The phased-array radar (PAR) of the National Weather Radar Testbed (NWRT) in Norman, Oklahoma represents a paradigm shift for weather radar observations. Through beam multiplexing (Yu et al. 2007), increased measurement accuracy can be achieved without increasing volume scan time. Alternatively, at the same measurement accuracy, more independent samples can be collected within a given time, al...

Novel technology to recognize the situation in distant place is necessary to develop a railway safety monitoring system by which human being having fallen onto the tracks from a platform and obstacles in the level crossing can be detected. In this research, we propose a method for detecting a stationary or moving obstacle by the technology which employs the super resolution radar techniques, th...

The U.S. Government operates seven distinct radar networks providing weather and aircraft surveillance for public weather services, air traffic control, and homeland defense. A next-generation, multifunction phased array radar (MPAR) concept has been proposed that could provide enhanced weather and aircraft surveillance services with potentially lower life-cycle costs than multiple single-funct...

Synthetic aperture radar (SAR) remote sensing, with its advantages of all-weather coverage, all day/night acquisitions, cloud penetration, and signal independence of the solar illumination angle, can be applied to land cover classification and land consolidation, especially in some regions where optics and infrared remote sensing do not work well. A limitation of its using for land consolidatio...

This paper focuses on the design of the master control software dedicated for the application of high-resolution polar detection ice radar. The central part of proposed software is FPGA, which plays roles of collecting radar echo data, playback of chirp signal, data transmission to upper computer, coherent integral accumulation of digitized data and system control of the whole radar system. The...

Synthetic aperture radar (SAR) is an active remote sensing tool operating in the microwave range of the electromagnetic spectrum. It uses the motion of the radar transmitter to synthesize an antenna aperture much larger than the actual antenna aperture in order to yield high spatial resolution radar images (Curlander & McDonough, 1991). It has been applied to military survey, terrain mapping, a...

We investigate effects of non-uniform beam-filling on TRMM PR rain retrieval using data from the NASAIJPL Airborne Rain MApping Radar (ARMAR) acquired during TOGA COARE in early 1993. Our approach is to simulate TRMM PR observations using the ARMAR data and compare the radar observable and retrieved rain rate from the simulated PR data with those corresponding to the high-resolution radar measu...

Results from two demonstration tests of a FMCW (Frequency Modulated Continuous Wave) 78GHz cloud radar are used to examine the radar’s ability to measure low cloud and fog. The first test took place at Payerne, Switzerland (from Nov 2003 to Feb 2004), as part of the COST 720 TUC (Temperature, Humidity & Cloud Profiling) Project; and the second test took place at the Chilbolton Facility for Atmo...

This paper presents the principle of synthetic aperture frequency modulated continuous wave (FM-CW) radar and demonstrates the detection results of several objects buried in natural snowpack using the radar system. First, the synthetic aperture technique is explained with emphasis placed on showing that the Fourier transformed beat signal obtained by the FM-CW radar is equivalent to one kind of...

The design of a weather radar system, as well as its scanning strategies, involves various tradeoffs based upon the goal of observing certain features of interest. The tradeoffs made in this design are based on certain assumptions about the performance of the radar system and on characteristics of the feature of interest. Often, the development of algorithms and optimal scanning strategies requ...