Certain characteristics of radio signals scattered by a sea surface in directions close to the direction of specular reflection

Kalmykov, A. I.; Kurekin, A. S.; Levantovskii, V. Yu.; Ostrovskii, I. E.; Pustovoitenko, V. V.

doi:10.1007/bf01031214

Cited by 2 publications

(1 citation statement)

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“…In general, the propagation factor is a complicated function of spatial coordinates and time, but for short distances and small grazing angles [12,13,14] it is possible to neglect the effects of depolarization…”

Section: Sea Clutter Mechanism In Fs Radarmentioning

confidence: 99%

Near zero grazing angle forward-scatter sea clutter measurement spectrum analysis

Hoare

Daniel

Gashinova

et al. 2012

IET International Conference on Radar Systems (Radar 2012)

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There is a lack of published experimental forward-scattering radar sea clutter data at very low (almost zero) grazing angle over the sea. This data is necessary to provide a fundamental understanding of the operating environment for the development of forward-scatter radar systems for maritime applications. Experimental data has therefore been recorded at frequencies of 7.5 GHz, 9.3 GHz, 24 GHz, and 37.5GHz using Forward Scatter Radar with static, medium gain antennas for low sea states 1-3. Results of clutter power spectral density measurements are presented and conclusions drawn from the results.

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Section: Sea Clutter Mechanism In Fs Radarmentioning

confidence: 99%

Near zero grazing angle forward-scatter sea clutter measurement spectrum analysis

Hoare

Daniel

Gashinova

et al. 2012

IET International Conference on Radar Systems (Radar 2012)

View full text Add to dashboard Cite

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Space Panoramic Radio Altimeter Model: Imaging of the Developing Tsunami Wave Field in a Bistatic Quasi-Mirror Radar

Kulikov

Pereslegin

Khalikov

2023

jour

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A model of the formation of the gradient sea-level field by the space bi-static radar measurements is developed. An interferometer radar with cross-sectional base is used as a receiver. The relatively small antenna 5–10 m of cross-sectional base gives a huge gain in energy when working for quasi-mirror scattering in the range of short wind waves. The efficiency of the system is evaluated by converting the dynamical model of tsunami wave evolution for the case of the Kuril earthquake (October 4, 1994) into a panoramic radar image of the sea level. The panoramic image of the front wave allows predicting the direction, amplitude and, finally, the expected time of tsunami arrival to a given point. The obtained radar image confirms the main feature of the quasi-mirror method: the fluctuation-level sensitivity varies within the radar swath (~2000 km) and is the worst near the mirror point. For the chosen radar parameters, the average sensitivity in the swath is ~5 cm for a site (15 × 15) km. Without accounting the time required to transmit information from the receiver to the tsunami–prone sites, the minimal time interval between the appearance of the wave front and the tsunami alert is determined by the number of sequentially launched small tandem spacecrafts. For a single tandem this time is about 45 min.

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Certain characteristics of radio signals scattered by a sea surface in directions close to the direction of specular reflection

Cited by 2 publications

References 0 publications

Near zero grazing angle forward-scatter sea clutter measurement spectrum analysis

Near zero grazing angle forward-scatter sea clutter measurement spectrum analysis

Space Panoramic Radio Altimeter Model: Imaging of the Developing Tsunami Wave Field in a Bistatic Quasi-Mirror Radar

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