scholarly journals Use of orthogonal linearly polarized signals in a dual channel board UHF radio beacon landing navigation systems

2017 ◽  
Vol 20 (1) ◽  
pp. 14-17 ◽  
Author(s):  
V.L. Gulko ◽  
◽  
A.A. Mescheryakov ◽  
Keyword(s):  
Navigation Systems ◽  
Dual Channel ◽  
Linearly Polarized ◽  
Landing Navigation ◽  
Radio Beacon

Radio engineering support of aircraft flights and aviation telecommunications

2021 ◽  
Author(s):  
Sergey Kudryakov ◽  
Valeriy Kul'chickiy ◽  
Nikolay Povarenkin ◽  
Viktor Ponomarev ◽  
Evgeniy Rubcov ◽  
...  
Keyword(s):  
Traffic Management ◽  
Air Traffic Management ◽  
Self Control ◽  
Training Manual ◽  
Navigation Systems ◽  
Master's Program ◽  
Radio Engineering ◽  
Aircraft Flight ◽  
Satellite Navigation Systems ◽  
Radio Beacon

The training manual describes the basics of radio engineering support for flights, the organization of radio engineering support for flights, and the general characteristics of flight support equipment. Information is provided about drive radios, marker beacons, radio beacon landing systems, automatic direction finders, RSBN system, VOR and DME beacons, satellite navigation systems, as well as radar surveillance equipment. The basics of telecommunications, issues of aviation telecommunications, as well as information about the means of aviation telecommunications are presented. There are questions for self-control. It is intended for students studying under the specialty program in the specialty 25.05.05 "Aircraft operation and air traffic management"; for students studying under the bachelor's program in the direction of training 25.03.04 "Airport operation and aircraft flight support", as well as for students studying under the master's program in the direction 25.04.04 "Airport Operation and aircraft flight support".

scholarly journals Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3024
Author(s):  
Xiaorong Ren ◽  
Manna Gu ◽  
Xiangyu Zeng ◽  
Rui Sun ◽  
Yuqin Zhang ◽  
...  
Keyword(s):  
Focal Point ◽  
Polarized Light ◽  
Spin Component ◽  
Destructive Interference ◽  
Constructive Interference ◽  
Dual Channel ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Potential Applications ◽  
Difference Time

The manipulations of nanoscale multi-channel vector beams (VBs) by metasurfaces hold potential applications in various important fields. In this paper, the metasurface with two sets of nanoslits arranged on elliptic curves was proposed to generate the dual-channel focused vector beams (FVBs). Each set of nanoslits was composed of the in-phase and the out-of-phase groups of nanoslits to introduce the constructive interference and destructive interference of the output light field of the nanoslits, focusing the converted spin component and eliminating the incident spin component at the focal point. The two sets of nanoslits for the channels at the two focal points were interleaved on the same ellipses, and by setting their parameters independently, the FVBs in the two channels are generated under illumination of linearly polarized light, while their orders and polarization states of FVBs were controlled independently. The generation of the FVBs with the designed metasurfaces was demonstrated by the finite-difference time domain (FDTD) simulations and by the experimental verifications. The work in this paper is of great significance for the generation of miniaturized multi-channel VBs and for broadening the applications of metasurfaces.

scholarly journals A Distributed Radio Beacon/IMU/Altimeter Integrated Localization Scheme with Uncertain Initial Beacon Locations for Lunar Pinpoint Landing

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5643
Author(s):  
Rongjun Mu ◽  
Yuntian Li ◽  
Rubin Luo ◽  
Bingzhi Su ◽  
Yongzhi Shan
Keyword(s):  
Estimation Accuracy ◽  
Measurement Unit ◽  
Iteration Algorithm ◽  
Navigation Systems ◽  
Potential Candidate ◽  
Hybrid Filter ◽  
Hybrid Form ◽  
Localization Scheme ◽  
Information Filter ◽  
Radio Beacon

As a growing number of exploration missions have successfully landed on the Moon in recent decades, ground infrastructures, such as radio beacons, have attracted a great deal of attention in the design of navigation systems. None of the available studies regarding integrating beacon measurements for pinpoint landing have considered uncertain initial beacon locations, which are quite common in practice. In this paper, we propose a radio beacon/inertial measurement unit (IMU)/altimeter localization scheme that is sufficiently robust regarding uncertain initial beacon locations. This scheme was designed based on the sparse extended information filter (SEIF) to locate the lander and update the beacon configuration at the same time. Then, an adaptive iterated sparse extended hybrid filter (AISEHF) was devised by modifying the prediction and update stage of SEIF with a hybrid-form propagation and a damping iteration algorithm, respectively. The simulation results indicated that the proposed method effectively reduced the error in the position estimations caused by uncertain beacon locations and made an effective trade-off between the estimation accuracy and the computational efficiency. Thus, this method is a potential candidate for future lunar exploration activities.

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