Radar transmitter emission criteria normally include the specification of frequency-dependent emission masks. These masks specify the amount by which unwanted radar emissions (both out-of-band and spurious) must be suppressed relative to the power levels emitted at the radars’ fundamental frequencies. Compliance with emission masks is determined through measurements of emission spectra. The mea...

Though heterodyne detection provides a valuable technique for detecting small signals, the conventional system has several inherent disadvantages. In applications such as communications and radar, obtaining a reasonably high signal-to-noise ratio (SNR) requires (1) a good knowledge of the velocity of the transmitter or target, (2) a stable yet tunable local oscillator, and (3) a target or sourc...

The multifrequency range imaging technique (RIM) has been implemented on the Chung–Li VHF array radar since 2008 after its renovation. This study made a more complete examination and evaluation of the RIM technique to facilitate the performance of the radar for atmospheric studies. RIM experiments with various radar parameters such as pulse length, pulse shape, receiver bandwidth, transmitter f...

North-Western Italy is a geographical region characterized by complex orography with many river catchments. Severe meteorological conditions frequently leads to flood situations due to very high rainfall amounts. In addition to a quite dense net of rain gauges, in the last three years two Doppler radar systems have been installed to provide a continuous monitoring of the region. The Bric della ...

In this paper, we investigate the optimization problem of transmitter-receiver pairing spaceborne cluster flight netted radar (SCFNR) for area coverage and target detection. First all, propose novel concept SCFNR integrated spacecraft with radar, mobility model bistatic pair twin-satellite mode, formulate radar-target distance distribution function product geometric probability method. Secondly...

An automatic landmine detection algorithm using Ground Penetrating Radar is described. The algorithm combines outputs of multiple detection and feature extraction algorithms to generate a single confidence that a landmine is present at a location. The combination is performed using a fuzzy inference system. Results are provided for real data obtained in real-time with the Geo-Centers Vehicle Mo...

Borehole radar can be used in a single-hole reflection mode or in a cross-hole tomography mode. In the reflection mode, radar provides an image of discontinuities in the bedrock surrounding a borehole, including bedding planes, lithologic contacts, fractures, and cavities. The measurements are either directional or omnidirectional, depending upon the type of equipment and antennas. In the tomog...

In radar systems, many researchers focused on the waveform design to improve the performance. And many algorithms just only consider the energy of the transmitted waveform. However, in practice, only the energy constraint is insufficient to guarantee that the signal will satisfy common envelope requirements, such as constant modulus that is important to radar transmitter. In this paper, we prop...