Influence of the ionosphere and the troposphere on the propagation of radio waves in the detection of space debris objects using multi-position radar system

2017 ◽  
Author(s):  
A. I. Baskakov ◽  
A. A. Komarov ◽  
M. S. Mikhailov ◽  
V. A. Permyakov
Keyword(s):  
Space Debris ◽  
Radar System ◽  
Radio Waves

A novel signal processing approach for LEO space debris based on a fence-type space surveillance radar system

2012 ◽  
Vol 50 (11) ◽  
pp. 1462-1472 ◽  
Author(s):  
Jian Huang ◽  
Weidong Hu ◽  
Mounir Ghogho ◽  
Qin Xin ◽  
Xiaoyong Du ◽  
...  
Keyword(s):  
Signal Processing ◽  
Space Debris ◽  
Radar System ◽  
Type Space ◽  
Processing Approach

scholarly journals A ground-based, multi-frequency ice-penetrating radar system

2002 ◽  
Vol 34 ◽  
pp. 171-176 ◽  
Author(s):  
Kenichi Matsuoka ◽  
Hideo Maeno ◽  
Seiho Uratsuka ◽  
Shuji Fujita ◽  
Teruo Furukawa ◽  
...  
Keyword(s):  
Ice Sheets ◽  
Radar System ◽  
Single Frequency ◽  
Radio Waves ◽  
Subsurface Structures ◽  
Underlying Principle ◽  
Timing Difference ◽  
Single Operator ◽  
Dronning Maud Land ◽  
Data Acquisition Unit

AbstractTo better understand how ice sheets respond to climate, we designed a new multi-frequency ice-penetrating radar system to investigate subsurface structures of ice sheets. The system is mounted on a single platform and handled by a single operator. Three radio frequencies, 30,60 and 179 MHz, were used. An underlying principle of these multi-frequency observations is that the lower frequencies are more sensitive to electrical conductivity changes, whereas the higher frequencies are more sensitive to dielectric permittivity fluctuations in the ice. The system is composed of three single-frequency pulse radars, a trigger-controller unit and a data-acquisition unit. The trigger controller is the key component of this system. It switches transmitters on at different timings to prevent mixing of signals among the three radars. The timing difference was set as 50 μs, which is equivalent to the two-way travel time for radio waves reflecting from 4250m below the surface. A field test was done along a 2000 km long traverse line in east Dronning Maud Land, Antarctica. The multi-frequency system successfully acquired data that are equivalent in quality to our earlier single-frequency measurements along the same traverse line. The details of the system and preliminary data are described.

scholarly journals Accurate and Efficient Representation of Obstacles Using Radar Visualizer

2021 ◽  
Vol 9 (VI) ◽  
pp. 4429-4431
Author(s):  
K. Akanksha
Keyword(s):  
Detection System ◽  
Target Position ◽  
Radar System ◽  
Motor Vehicles ◽  
Radio Waves ◽  
Receiving Antenna ◽  
Efficient Representation ◽  
Transmitting Antenna ◽  
Analyze Data

Radar is a detection system that uses radio waves to determine the range, angle or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar system consist of a transmitting antenna, a receiving antenna (often same antenna is used for transmitting and receiving) and a receiver and process to determine properties of the objects. In our project we are detecting the target position of the obstacles that come in our way be it in military, aircrafts, ships, clouds, etc. using MATLAB. Using MATLAB, you can: analyze data, develop algorithms, create models and applications. The language, apps, and build in math functions enable you to quickly explore multiple approaches to arrive at a solution. Using MATLAB and Simulink we are doing radar visualizer.

scholarly journals A low-frequency ice-penetrating radar system adapted for use from an airplane: test results from Bering and Malaspina Glaciers, Alaska, USA

2009 ◽  
Vol 50 (51) ◽  
pp. 93-97 ◽  
Author(s):  
Howard Conway ◽  
Ben Smith ◽  
Pavan Vaswani ◽  
Kenichi Matsuoka ◽  
Eric Rignot ◽  
...  
Keyword(s):  
Low Frequency ◽  
Radar System ◽  
Ice Thickness ◽  
Radio Waves ◽  
Low Frequencies ◽  
Throat Region ◽  
High Attenuation ◽  
Glacier System ◽  
Dielectric Absorption ◽  
Thickness Measurements

AbstractIce-thickness measurements are needed to calculate fluxes through fast-flowing outlet glaciers in Greenland, Alaska, Patagonia and Antarctica. However, relatively high attenuation of radio waves by dielectric absorption and volume scattering from englacial water hampers detection of the bed through warm deep ice. In the past we have had success measuring ice thickness of temperate glaciers using a ground-based monopulse radar system operating at low frequencies (2 MHz). Here we adapt the same system to operate from an airplane. Test flights over Bering Glacier, Alaska, USA, detected the bed through ice up to 1250m thick. Flights across the Seward–Malaspina Glacier system, Alaska, resolved the ice thickness of Malaspina Glacier, but strong hyperbolic-shaped returns obscured the bed echo through the Seward throat. It is likely that this clutter in the signal was caused by off-nadir returns from chaotic surface crevasses that are ubiquitous in the throat region.

Study of a Bistatic Radar System Using VLBI Technologies for Detecting Space Debris and the Experimental Verification of its Validity

2006 ◽  
Vol 100 (1-2) ◽  
pp. 57-76 ◽  
Author(s):  
Masanobu Yajima ◽  
Kazutomo Tsuchikawa ◽  
Toshiyuki Murakami ◽  
Kazuyoshi Katsumoto ◽  
Tadashi Takano
Keyword(s):  
Experimental Verification ◽  
Space Debris ◽  
Radar System ◽  
Bistatic Radar
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