Improving the efficiency of Hadamard matrix mining for digital conversion methods

Balonin, Iu.N.; Vostrikov, A.A.; Kurtianik, D.V.; Sergeev, A.M.

doi:10.47813/nto.2.2022.5.92-100

Cited by 2 publications

References 4 publications

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Radar sensing of the sea surface using small spacecraft

Карцан

Zhukov

2022

ICIGIS

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The possibility of using a constellation of small spacecraft as receiving satellites, when “highlighting” the sea surface from existing (navigational, communication) or specially created spacecraft—to form a wide-area (about 1 000 km) radar survey zone at a given resolution (about 10 m)—is under consideration. Such a constellation could provide operational monitoring of fast-moving atmospheric cyclones, measuring directly the parameters of storm waves (altitude and orbital velocity)—which would replace the existing constellation of microwave scatterometers, providing operational monitoring of the World Ocean surface in the 3 H (H—altitude of the satellite’s orbit) field of view with a resolution of about 10 km—but with calibration of the received images by wind speed and direction, which leads to huge errors when trying to introduce altitude calibration in the Small spacecraft have many advantages over large satellites. For example, they are relatively inexpensive to build, take minimal time from design to launch, are easily modified to solve a specific problem, and create less radio interference. The approach under consideration consists in redistribution of tasks to be solved between the constellation of satellites in orbit. High orbiting navigation satellites, for example, can be used as transmitter carriers (of the illumination of the surface) that use the necessary broadband signal with acceptable periodicity. Receivers of reflected signals are placed on board small spacecraft, and at formation of wide-band radar image of sea surface with necessary resolution ∼10 m (that only on order exceeds acceptable on small spacecraft size of receiving antennas)—in flight direction is necessary to use synthesized aperture of receiving antenna. This work has the character of “staged” research.

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Radar sensing of the sea surface using small spacecraft

Карцан

Zhukov

2022

ICIGIS

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Aerodynamic Analysis of Wing-in-Ground (WIG) Effect Vehicle: Wing Profile and Orientation

Mohid,

Kamdani,

Ibrahim

et al. 2024

Advances in Science and Technology

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Wing-In-Ground (WIG) Effect Vehicle can be differentiated into manned and unmanned aerial vehicle. These aircraft are designed in aerodynamic shapes to enables them to glide at low altitude above the sea surface. Proper design of wings and stabilizer is crucial to provide effective lifting force with minimum total body weight. A study was conducted to determine the orientation and shape of the wing and stabilizer for a new WIG Effect vehicle prototype. Three-dimensional modeling and air flow analysis were carried out to analyze the lifting force generated under the provided body construction materials and total gross weight. In this study, two wing designs and wing orientations were studied since the WIG Effect vehicle is not equipped with wing aileron or wing flap. The first design is called as original design which suggested by industrial fabricator and the second design is called as modified design suggested from this study for design improvement. The modified wing exhibited the largest lifting force, which applied the Bernoulli’s Principle in the design. Modified wing at 20° angle of attack has been selected as the best orientation of wing.

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Improving the efficiency of Hadamard matrix mining for digital conversion methods

Cited by 2 publications

References 4 publications

Radar sensing of the sea surface using small spacecraft

Radar sensing of the sea surface using small spacecraft

Aerodynamic Analysis of Wing-in-Ground (WIG) Effect Vehicle: Wing Profile and Orientation

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