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Fast post-Doppler STAP with road map for traffic monitoring: overview and first results 具有交通监测路线图的快速多普勒后STAP：概述和初步结果
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-137-2019
A. B. C. da Silva, S. Baumgartner, A. Moreira
{"title":"Fast post-Doppler STAP with road map for traffic monitoring: overview and first results","authors":"A. B. C. da Silva, S. Baumgartner, A. Moreira","doi":"10.5194/ars-17-137-2019","DOIUrl":"https://doi.org/10.5194/ars-17-137-2019","url":null,"abstract":"Abstract. Synthetic aperture radar (SAR) is an efficient solution for road traffic monitoring due to its high spatial resolution and independence from daylight and weather conditions. In this sense, a number of ground moving target indication (GMTI) algorithms have been developed, whereas their robustness is often achieved with high costs, increased hardware complexity and high computational burden. This paper presents a fast GMTI processor that blends the powerful post-Doppler space-time adaptive processing (PD STAP) with an a priori known road map and digital elevation model (DEM). The algorithm presents great potential for real-time processing, decreased hardware complexity and low costs compared to state-of-the-art systems. It is tested using real 4-channel X-band radar data acquired with the DLR's airborne F-SAR.","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44897052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
High-resolution signal-in-space measurements of VHF omnidirectional ranges using UAS 利用无人机对甚高频全向范围的高分辨率空间信号进行测量
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-1-2019
T. Schrader, J. Bredemeyer, M. Mihalachi, D. Ulm, T. Kleine-Ostmann, Christoph Stupperich, Sergei Sandmann, H. Garbe
{"title":"High-resolution signal-in-space measurements of VHF omnidirectional ranges using UAS","authors":"T. Schrader, J. Bredemeyer, M. Mihalachi, D. Ulm, T. Kleine-Ostmann, Christoph Stupperich, Sergei Sandmann, H. Garbe","doi":"10.5194/ars-17-1-2019","DOIUrl":"https://doi.org/10.5194/ars-17-1-2019","url":null,"abstract":"Abstract. In this paper, we describe measurement results of the\u0000signal-in-space of very high frequency (VHF) omnidirectional range (VOR)\u0000facilities. In aviation VOR are used to display the current course of the\u0000aircraft in the cockpit. To understand the influence of wind turbines (WT)\u0000on the signal integrity of terrestrial navigation and radar signals, the\u0000signal content and its changes, respectively, must be investigated. So far,\u0000only numerical simulations have been carried out on the frequency-modulation\u0000(FM) part of the Doppler-VOR (DVOR) signal to estimate the influence of WT\u0000on DVOR. Up to now, the amplitude-modulated (AM) part of the DVOR was not\u0000assessed at all. In 2016, we presented an unmanned aerial system (UAS) as a\u0000carrier for state-of-the-art radio-frequency (RF) measurement\u0000instrumentation (Schrader et al., 2016a, c; Bredemeyer et al., 2016), to measure and to record the true signal-in-space\u0000(both FM and AM signal) during the flight. The signal-in-space (which refers\u0000to time-resolved signal content and field strength, respectively) is\u0000measured and sampled without loss of information and, furthermore,\u0000synchronously stored with time stamp and with precise position in space,\u0000where the measurements were taken.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47133820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Tidal wind shear observed by meteor radar and comparison with sporadic E occurrence rates based on GPS radio occultation observations 流星雷达观测到的潮汐风切变及其与基于GPS无线电掩星观测的零星E发生率的比较
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-213-2019
C. Jacobi, C. Arras
{"title":"Tidal wind shear observed by meteor radar and comparison with sporadic E occurrence rates based on GPS radio occultation observations","authors":"C. Jacobi, C. Arras","doi":"10.5194/ars-17-213-2019","DOIUrl":"https://doi.org/10.5194/ars-17-213-2019","url":null,"abstract":"Abstract. We analyze tidal (diurnal, semidiurnal, terdiurnal, quarterdiurnal) phases\u0000and related wind shear in the mesosphere/lower thermosphere as observed by\u0000meteor radar over Collm (51.3∘ N, 13.0∘ E). The wind shear phases are\u0000compared with those of sporadic E (Es) occurrence rates, which were\u0000derived from GPS radio occultation signal-to-noise ratio (SNR) profiles\u0000measured by the COSMIC/FORMOSAT-3 satellites. At middle latitudes Es are\u0000mainly produced by wind shear, which, in the presence of a horizontal\u0000component of the Earth's magnetic field, leads to ion convergence in the region\u0000where the wind shear is negative. Consequently, we find good correspondence\u0000between radar derived wind shear and Es phases for the semidiurnal,\u0000terdiurnal, and quarterdiurnal tidal components. The diurnal tidal wind\u0000shear, however, does not correspond to the Es diurnal signal.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41883575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Multilayered Transmission Lines on Quasi-planar Substrates With Anisotropic Medium 各向异性介质准平面基片上的多层传输线
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-77-2019
Veenu Kamra, A. Dreher
{"title":"Multilayered Transmission Lines on Quasi-planar Substrates With Anisotropic Medium","authors":"Veenu Kamra, A. Dreher","doi":"10.5194/ars-17-77-2019","DOIUrl":"https://doi.org/10.5194/ars-17-77-2019","url":null,"abstract":"Abstract. This paper exhibits the extension of the discrete mode matching (DMM) method to analyze conformal structures with anisotropy. It represents a simple formalism as a basis to analyze multilayered structures with quasi-planar anisotropic dielectric layers. The dyadic Green's function is then calculated using a full-wave equivalent circuit (FWEC) of the structure, where each layer is represented with the hybrid block consisting of the tangential field components. The application is demonstrated by computing propagation constants for partially filled quasi-planar waveguides and microstrip lines with isotropic, uniaxial and biaxial anisotropic dielectrics.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47116091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Results of the national antenna intercomparison 2017/2018 within the German Calibration Service (Deutscher Kalibrierdienst – DKD) 德国校准服务(Deutscher Kalibrierdienst - DKD) 2017/2018年全国天线比对结果
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-35-2019
D. Ulm, T. Kleine-Ostmann, T. Schrader
{"title":"Results of the national antenna intercomparison 2017/2018 within the German Calibration Service (Deutscher Kalibrierdienst – DKD)","authors":"D. Ulm, T. Kleine-Ostmann, T. Schrader","doi":"10.5194/ars-17-35-2019","DOIUrl":"https://doi.org/10.5194/ars-17-35-2019","url":null,"abstract":"Abstract. In an intercomparison organized within the framework of the German\u0000Calibration Service (Deutscher Kalibrierdienst – DKD), seven different\u0000calibration laboratories participated in the measurement of the antenna\u0000factor for three different antennas according to different standards. Between\u0000August 2017 and April 2018, measurements have been performed on a hybrid\u0000antenna, a logarithmic-periodic antenna and on an Open Ended Waveguide.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42915516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Disturbing impact of multiple wind turbines on the indicated DVOR bearing 多台风力涡轮机对指示DVOR轴承的干扰影响
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-11-2019
Sergei Sandmann, H. Garbe
{"title":"Disturbing impact of multiple wind turbines on the indicated DVOR bearing","authors":"Sergei Sandmann, H. Garbe","doi":"10.5194/ars-17-11-2019","DOIUrl":"https://doi.org/10.5194/ars-17-11-2019","url":null,"abstract":"Abstract. Radio navigation aids, like the Doppler Very High Frequency Omnidirectional Radio Range (DVOR), provide their navigation service by specific radiation of electromagnetic waves depending on the direction in space and according to their specific antenna characteristics. Therefore, these navigation aids are reliant on undisturbed wave propagation in their operation range. Certainly, a propagation disturbance can be implicated by the presence of scattering objects like large buildings or wind turbines (WT) in the surrounding area of the DVOR, which potentially leads to deviations of the transmitted navigation content. In order to comply with the specified flight safety limits, especially respecting WTs, there is a necessity to predict the prospective bearing error due to installations not only of individual WTs but also of additional ones in a present wind farm or repowering projects. Accordingly, this paper is aimed at ascertaining the bearing deviations' dependency on the quantity of WTs in a realistic wind farm close to a DVOR, calculated in space areas of practical relevance.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42399286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Estimation of ionospheric reflection height using long wave propagation 利用长波传播估计电离层反射高度
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-205-2019
D. Keuer
{"title":"Estimation of ionospheric reflection height using long wave propagation","authors":"D. Keuer","doi":"10.5194/ars-17-205-2019","DOIUrl":"https://doi.org/10.5194/ars-17-205-2019","url":null,"abstract":"Abstract. Phase height measurements of low frequency radio waves\u0000are used to study the long-term variability of the mesosphere over Europe.\u0000Phase height measurements use a characteristic pattern in field strength\u0000registration of radio waves interpreted as phase relations between sky wave\u0000and surface wave to obtain the apparent height of the reflection point, the\u0000Standard Phase Height (SPH). Based on this SPH-method a homogenized daily\u0000series was generated since 1959 at Kühlungsborn. Improvements of the\u0000measuring method show that the signal is significantly influenced by lower\u0000atmospheric layers. Mesospheric reflection is not the exclusive source of\u0000the measured behavior. Tropospheric influence can not be neglected. Taking\u0000this into account one has to conclude that the strong coherency of the SPH\u0000data to mesospheric heights is not as significant as previously assumed.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42671742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Singularity Expansion Method for thin wires and the Method of Modal Parameters 细导线奇异展开法及模态参数法
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-177-2019
S. Tkachenko, J. Nitsch, Felix Middelstaedt, R. Rambousky, M. Schaarschmidt, R. Vick
{"title":"Singularity Expansion Method for thin wires and the Method of Modal Parameters","authors":"S. Tkachenko, J. Nitsch, Felix Middelstaedt, R. Rambousky, M. Schaarschmidt, R. Vick","doi":"10.5194/ars-17-177-2019","DOIUrl":"https://doi.org/10.5194/ars-17-177-2019","url":null,"abstract":"Abstract. Here, we describe a technique to define the Singularity\u0000Expansion Method (SEM) poles for short-circuited thin-wire structures\u0000developed using the Method of Modal Parameters (MoMP). The MoMP method\u0000consists of in the expansion of the system of mixed-potential integral\u0000equations (MPIE) into the Fourier series, including the kernels containing\u0000Green's function. Corresponding equations for Fourier modes contain infinite\u0000matrices of p.u.l. inductance and capacitance, and the solution for current\u0000can be obtained using the infinity matrix of p.u.l. impedance. The SEM poles\u0000are given by the zeros of the determinant of this matrix. For the case of\u0000the symmetrical circular loop, this equation transforms to one well-know\u0000from the literature. Numerical investigation of solutions for the poles of\u0000the first layer has shown good agreement with previously obtained analytical\u0000and numerical results for different wire configurations.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48157722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Extending the vehicular network simulator Artery in order to generate synthetic data for collective perception 扩展车辆网络模拟器动脉，以便为集体感知生成合成数据
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-189-2019
Christoph Allig, G. Wanielik
{"title":"Extending the vehicular network simulator Artery in order to generate synthetic data for collective perception","authors":"Christoph Allig, G. Wanielik","doi":"10.5194/ars-17-189-2019","DOIUrl":"https://doi.org/10.5194/ars-17-189-2019","url":null,"abstract":"Abstract. A fundamental for an automated driving car is the awareness of all its surrounding road participants. Current approach to gather this awareness is to sense the environment by on-board sensors. In the future, Vehicle-to-X (V2X) might be able to improve the awareness due to V2X's communication range superiority compared to the on-board sensors' range. Due to a limited amount of communication partners sharing their own ego states, current research focuses particularly on cooperative perception. This means sharing objects perceived by local on-board sensors of different partners via V2X. Data collections using vehicles, driving on real roads, is challenging, since there is no market introduction of cooperative perception yet. Using test cars, equipped with the required sensors are rather expensive and do not necessarily provide results representing the true potential of cooperative perception. Particularly, its potential is highly dependent on the market penetration rate and the amount of vehicles within certain vicinity. Therefore, we consider to create synthetic data for cooperative perception by a simulation tool. After reviewing suitable simulation tools, we present an extension of Artery and its counterpart SUMO by modelling realistic vehicle dynamics and probabilistic sensor models. The generated data can be used as input for cooperative perception.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47714077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Application of Kramers-Kronig transformations to increase the bandwidth of small antennas Kramers-Kronig变换在提高小型天线带宽中的应用
IF 0.4
Advances in Radio Science Pub Date : 2019-09-19 DOI: 10.5194/ars-17-65-2019
M. Bakry, L. Klinkenbusch
{"title":"Application of Kramers-Kronig transformations to increase the bandwidth of small antennas","authors":"M. Bakry, L. Klinkenbusch","doi":"10.5194/ars-17-65-2019","DOIUrl":"https://doi.org/10.5194/ars-17-65-2019","url":null,"abstract":"Abstract. The internally stored electric energy (Q-energy) of a disk monopole antenna increases as compared to a monopole antenna without a top disk. Recently it was shown that the Q-energy can be significantly reduced and the bandwidth increased by shielding the disk monopole antenna using a thin magnetic material. In the present paper we consider the same structure to explain another method to increase the bandwidth by using a shield made of dispersive magnetic material. We apply the Kramers-Kronig transforms to derive physically correct real and imaginary parts of the dispersive magnetic material. We do not aim at a reduction of the internal energy but at a compensation of the electric by a magnetic stored energy for a wide frequency range. Disk monopole antennas with shells consisting of such dispersive permeability are finally numerically evaluated by means of a commercial frequency-domain field simulator.\u0000","PeriodicalId":45093,"journal":{"name":"Advances in Radio Science","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41342641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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