Journal of Atmospheric and Oceanic Technology最新文献_第7页

A simple method for estimating horizontal diffusivity 估计水平扩散系数的一种简单方法

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-12 DOI: 10.1175/jtech-d-22-0097.1

{"title":"A simple method for estimating horizontal diffusivity","authors":"","doi":"10.1175/jtech-d-22-0097.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0097.1","url":null,"abstract":"\u0000A common dilemma for oceanographers is the choice of horizontal diffusivity. There is no single answer as we could argue that diffusion depends precisely on those processes that cannot be sampled or modeled. Here we propose the radial offset by diffusion (ROD) method as a simple model-dependent approach for estimating these coefficients, and show its application for the southwestern South Atlantic. The method compares actual displacements of field drifters with numerical trajectory predictions. The observed-predicted differences in radial positions (radial offsets), which respond to diffusive motions not captured by the numerical model, are reproduced with a one-dimensional radial-diffusive solution through a proper selection of the diffusion coefficient. The method is tested at eight depths, from the sea surface down to 2000 m, using several drifter datasets and the Parcels software applied to the GLORYS12v1 (1/12° daily) velocity outputs. In all cases the radial offsets show Gaussian distributions that are well reproduced by the radial diffusive solution. Maximum diffusivities of 4630-4980 m2 s−1 happen in the upper 200 m of the water column and minimum values of 1080-1270 m2 s−1 occur between 1400 and 2000 m. The 15-m diffusivity is fairly constant in latitude (3850 to 5270 m2 s−1), but the 1000-m diffusivity decreases from 1640-1820 m2 s−1 north of the Polar Front to 530 m2 s−1 south of the Southern Boundary. A comparison with other diffusivity studies validates the good adequacy of the ROD method for numerical and field applications.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":"1 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64665988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Technical Overview of the North Carolina ECONet 北卡罗莱纳州经济网络技术概述

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-12 DOI: 10.1175/jtech-d-22-0079.1

S. Saia, Sean P. Heuser, Myleigh D. Neill, William A. LaForce, John A. McGuire, K. Dello

{"title":"A Technical Overview of the North Carolina ECONet","authors":"S. Saia, Sean P. Heuser, Myleigh D. Neill, William A. LaForce, John A. McGuire, K. Dello","doi":"10.1175/jtech-d-22-0079.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0079.1","url":null,"abstract":"\u0000Regional weather networks–also referred to as mesonets–are imperative for filling in the spatial and temporal data gaps between nationally supported weather stations. The North Carolina Environment and Climate Observing Network (ECONet) fills this regional role; it is a mesoscale network of 44 (as of 2023) automated stations collecting 12 environmental variables every minute across North Carolina. Measured variables include air temperature, precipitation, relative humidity, barometric pressure, wind speed, wind direction, total solar radiation, photosynthetically active radiation, soil temperature, soil moisture, leaf wetness index, and black globe temperature. All data undergo quality control procedures and are made freely available to the public via data portals hosted by the State Climate Office of North Carolina at North Carolina State University. This paper provides a technical overview of ECONet, including a description of the siting criteria, station maintenance procedures, data quality control procedures, and data availability. We also summarize unique aspects of ECONet data collection as well as innovative research and applications that rely on ECONet data. ECONet data are used by many sectors including, but not limited to, emergency management, natural resources management, public health, agriculture, forestry, science education, outdoor recreation, and research. ECONet data and data-powered applications offer valuable insights to local, regional, and federal partners yet opportunities to expand ECONet research and applications remain.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48547713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New signal processing techniques for phased-array oceanographic radars: self-calibration, antenna grouping, and denoising 相控阵海洋雷达信号处理新技术：自校准、天线分组和去噪

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-10 DOI: 10.1175/jtech-d-22-0064.1

Dylan Dumas, Charles-Antoine Guérin

{"title":"New signal processing techniques for phased-array oceanographic radars: self-calibration, antenna grouping, and denoising","authors":"Dylan Dumas, Charles-Antoine Guérin","doi":"10.1175/jtech-d-22-0064.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0064.1","url":null,"abstract":"\u0000Original techniques are proposed for the improvement of surface current mapping with phased-array oceanographic High-Frequency Radars. The first idea, which works only in bistatic configuration, is to take advantage of a remote transmitter to perform an automatic correction of the receiving antennas based on the signal received in the direct path, an adjustment that is designated as “self-calibration”. The second idea, which applies to both mono- and bistatic systems, consists in applying a Direction Finding (DF) technique (instead of traditional Beam Forming) not only to the full antenna array but also to subarrays made of a smaller number of sequential antennas, a method which is referred to as “antenna grouping”. In doing this, the number of sources can also be varied, leading to an increased number of DF maps that can be averaged, an operation which is designated as “source stacking”. The combination of self-calibration, antenna grouping, and source stacking makes it possible to obtain high-resolution maps with increased coverage and is found robust to damaged antennas. The third improvement concerns the mitigation of noise in the antenna signal. These methods are illustrated with the multistatic High-Frequency Radar network in Toulon and their performances are assessed with drifters. The improved DF technique is found to significantly increase the accuracy of radar-based surface current when compared to the conventional Beam Forming technique.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47790862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-Point Calibration for Microwave Sounders: Application to TEMPEST-D 微波测深仪的单点校准：在TEMPEST-D中的应用

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-07 DOI: 10.1175/jtech-d-22-0063.1

S. Brown, A. Tanner, S. Reising, W. Berg

{"title":"Single-Point Calibration for Microwave Sounders: Application to TEMPEST-D","authors":"S. Brown, A. Tanner, S. Reising, W. Berg","doi":"10.1175/jtech-d-22-0063.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0063.1","url":null,"abstract":"\u0000Passive microwave sounders are critical for accurate forecasts from numerical weather prediction models. These sensors are calibrated using a traditional two-point approach, with one source typically a free-space blackbody target and the second a clear view to the cosmic microwave background, commonly referred to as “cold space.” Occasionally, one or both of these calibration sources can become corrupted, either by solar/lunar intrusion in the cold space view or by thermal instability of the blackbody calibration source. A Temporal Experiment for Storms and Tropical Systems (TEMPEST) microwave sounder instrument is currently deployed on the International Space Station (ISS) for a 3-year mission. TEMPEST is also calibrated using a blackbody target and cold space view; however, the cold space view will be routinely obstructed by objects present on the ISS. Here we test an alternative single point calibration methodology that uses only the blackbody calibration target. We find the brightness temperature difference between this new approach and the traditional two-point calibration approach to be < 0.1 K when applied to 3 years of the TEMPEST CubeSat Demonstration (TEMPEST-D) mission data from 2018-2020. This approach is applicable to other microwave radiometers that experience occasional degradation of calibration sources, such as thermal effects, intrusions or instability of noise diodes.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46026652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multispectral Satellite Imagery Products for Fire Weather Applications 火灾天气应用的多光谱卫星图像产品

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-03 DOI: 10.1175/jtech-d-22-0107.1

Curtis J. Seaman, W. Line, R. Ziel, Jennifer L. Jenkins, C. Dierking, Greg Hanson

{"title":"Multispectral Satellite Imagery Products for Fire Weather Applications","authors":"Curtis J. Seaman, W. Line, R. Ziel, Jennifer L. Jenkins, C. Dierking, Greg Hanson","doi":"10.1175/jtech-d-22-0107.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0107.1","url":null,"abstract":"\u0000Two multispectral satellite imagery products are presented that were developed for use within the fire management community. These products, which take the form of false color red-green-blue composites, were designed to aid fire detection and characterization, and for assessment of the environment surrounding a fire. The first, named the Fire Temperature RGB, uses spectral channels near 1.6 μm, 2.2 μm and 3.9 μm for fire detection and rapid assessment of the range of fire intensity through intuitive coloration. The second, named the Day Fire RGB, uses spectral channels near 0.64 μm, 0.86 μm and 3.9 μm for rapid scene assessment. The 0.64 μm channel provides information on smoke, the 0.86 μm channel provides information on vegetation health and burn scars, and the 3.9 μm channel provides active fire detections. Examples of these red-green-blue composite images developed from observations collected by three operational satellite imagers (VIIRS on the polar-orbiting platform and the Advanced Baseline Imager and Advanced Himawari Imager on the geostationary platform) demonstrate that both red-green-blue composites are useful for fire detection and contain valuable information that is not present within operational fire detection algorithms. In particular, it is shown that Fire Temperature RGB and Day Fire RGB images from VIIRS have similar utility for fire detection as the operational VIIRS Active Fire products, with the added benefit that the imagery provides context for more than just the fires themselves.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44850193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AERONET-OC LWN Uncertainties: Revisited AERONET-OC LWN的不确定性：再谈

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-01 DOI: 10.1175/jtech-d-22-0061.1

I. Cazzaniga, G. Zibordi

{"title":"AERONET-OC LWN Uncertainties: Revisited","authors":"I. Cazzaniga, G. Zibordi","doi":"10.1175/jtech-d-22-0061.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0061.1","url":null,"abstract":"\u0000The Ocean Color Component of the Aerosol Robotic Network (AERONET-OC) aims at supporting the assessment of satellite ocean color radiometric products with in situ reference data derived from automated above-water measurements. This study, applying metrology principles and taking advantage of recent technology and science advances, revisits the uncertainty estimates formerly provided for AERONET-OC normalized water-leaving radiances LWN. The new uncertainty values are quantified for a number of AERONET-OC sites located in marine regions representative of chlorophyll-a-dominated waters (i.e., Case 1) and a variety of optically complex waters. Results show uncertainties typically increasing with the optical complexity of water and wind speed. Relative and absolute uncertainty values are provided for the various sites together with contributions from each source of uncertainty affecting measurements. In view of supporting AERONET-OC data users, the study also suggests practical solutions to quantify uncertainties for LWN from its spectral values. Additionally, results from an evaluation of the temporal variability characterizing LWN at various AERONET-OC sites are presented to address the impact of temporal mismatches between in situ and satellite data in matchup analysis.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46981948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Ocean Tides near Hawaii from Satellite Altimeter Data. Part III 来自卫星高度计数据的夏威夷附近的海洋潮汐。第三部分

4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-04-01 DOI: 10.1175/jtech-d-22-0052.1

Yibo Zhang, Shengyi Jiao, Yuzhe Wang, Yonggang Wang, Xianqing Lv

{"title":"Ocean Tides near Hawaii from Satellite Altimeter Data. Part III","authors":"Yibo Zhang, Shengyi Jiao, Yuzhe Wang, Yonggang Wang, Xianqing Lv","doi":"10.1175/jtech-d-22-0052.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0052.1","url":null,"abstract":"Abstract The Chebyshev polynomial fitting (CPF) method has been proved to be effective to construct reliable cotidal charts for the eight major tidal constituents (M 2 , S 2 , K 1 , O 1 , N 2 , K 2 , P 1 , and Q 1 ) and six minor tidal constituents (2N 2 , J 1 , L 2 , Mu 2 , Nu 2 , and T 2 ) near Hawaii in Part I and Part II, respectively. In this paper, this method is extended to estimate the harmonic constants of four long-period tidal constituents (M f , M m , S a , and S sa ). The harmonic constants obtained by this method were compared with those from the TPXO9, Finite Element Solutions 2014 (FES2014), and Empirical Ocean Tide 20 (EOT20) models, using benchmark data from satellite altimeters and eight tide gauges. The accuracies of the M f and M m constituents derived from the CPF method are comparable to those from the models, but the accuracies of the S a and S sa constituents are significantly higher than those from the FES2014 and EOT20 models. The results indicate that the CPF method is also effective for estimating harmonic constants of long-period tidal constituents. Furthermore, since the CPF method relies only on satellite altimeter data, it is an easier-to-use method than these ocean tide models.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136121334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Flippin’ χSOLO, an Upper Ocean Autonomous Turbulence Profiling Float Flippin’χSOLO，一种上层海洋自主湍流剖面浮标

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-03-29 DOI: 10.1175/jtech-d-22-0067.1

J. Moum, D. Rudnick, E. Shroyer, K. Hughes, B. Reineman, Kyle R. Grindley, J. Sherman, Pavan Vutukur, Craig Van Appledorn, Kerry Latham, Aurélie J. Moulin, T. M. Johnston

{"title":"Flippin’ χSOLO, an Upper Ocean Autonomous Turbulence Profiling Float","authors":"J. Moum, D. Rudnick, E. Shroyer, K. Hughes, B. Reineman, Kyle R. Grindley, J. Sherman, Pavan Vutukur, Craig Van Appledorn, Kerry Latham, Aurélie J. Moulin, T. M. Johnston","doi":"10.1175/jtech-d-22-0067.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0067.1","url":null,"abstract":"\u0000A new autonomous turbulence profiling float has been designed, built and tested in field trials off Oregon. Flippin’ χSOLO (FχS) employs a SOLO-II buoyancy engine that not only changes but also shifts ballast to move the center of mass to positions on either side of the center of buoyancy thus causing FχS to flip. FχS is outfitted with a full suite of turbulence sensors—two shear probes, two fast thermistors and pitot tube as well as a pressure sensor and 3-axis linear accelerometers. FχS descends and ascends with turbulence sensors leading, thereby permitting measurement through the sea surface. The turbulence sensors are housed antipodal from communication antennae so as to eliminate flow disturbance. By flipping at the sea surface, antennae are exposed for communications. The mission of FχS is to provide intensive profiling measurements of the upper ocean from 240m and through the sea surface, particularly during periods of extreme surface forcing. While surfaced, accelerometers provide estimates of wave height spectra and significant wave height. From day field trials, here we evaluate (i) the statistics from two FχS units and our established shipboard profiler, Chameleon, and (ii) FχS-based wave statistics by comparison to a nearby NOAA wave buoy.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45614924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Subsurface Eddy Detection Optimized with Potential Vorticity from Models in the Arabian Sea 利用阿拉伯海模型中的潜在涡度优化地下涡流探测

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-03-24 DOI: 10.1175/jtech-d-22-0121.1

P. Ernst, B. Subrahmanyam, Y. Morel, C. Trott, A. Chaigneau

{"title":"Subsurface Eddy Detection Optimized with Potential Vorticity from Models in the Arabian Sea","authors":"P. Ernst, B. Subrahmanyam, Y. Morel, C. Trott, A. Chaigneau","doi":"10.1175/jtech-d-22-0121.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0121.1","url":null,"abstract":"\u0000Coherent ocean vortices, or eddies, are usually tracked on the surface of the ocean. However, tracking subsurface eddies is important for a complete understanding of deep ocean circulation. In this study, we develop an algorithm designed for the detection of subsurface eddies in the Arabian Sea using Nucleus for European Modelling of the Ocean (NEMO) model simulations. We optimize each parameter of our algorithm to achieve favorable results when compared with an algorithm using sea surface height (SSH). When compared to similar methods, we find that using the rescaled isopycnal potential vorticity (PV) is best for subsurface eddy detection. We proceed to demonstrate that our new algorithm can detect eddies successfully between specific isopycnals, such as those that define the Red Sea Water (RSW). In doing so, we showcase how our method can be used to describe the properties of eddies within the RSW and even identify specific long-lived subsurface eddies. We conduct one such case study by discerning the structure of a completely subsurface RSW eddy near the Chagos Archipelago using Lagrangian particle tracking and PV diagnostics. We conclude that our rescaled PV method is an efficient tool for investigating eddy dynamics within the ocean’s interior, and publicly provide our optimization methodology as a way for other researchers to develop their own subsurface detection algorithms with optimized parameters for any spatiotemporal model domain.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42053316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Cross Coupling Mitigation in Polarimetric PAR via Antenna Tilt 通过天线倾斜抑制极化标准杆数中的交叉耦合

IF 2.2 4区地球科学

Journal of Atmospheric and Oceanic Technology Pub Date : 2023-03-17 DOI: 10.1175/jtech-d-22-0059.1

I. Ivić

{"title":"Cross Coupling Mitigation in Polarimetric PAR via Antenna Tilt","authors":"I. Ivić","doi":"10.1175/jtech-d-22-0059.1","DOIUrl":"https://doi.org/10.1175/jtech-d-22-0059.1","url":null,"abstract":"\u0000The existence of significant cross-polar antenna patterns, as well as the scan-dependent measurement biases, inherent to the polarimetric phased array radar (PPAR), are among the most important risk factors for using this technology in weather observations. The cross-polar patterns on receive induce cross coupling between returns from the two orthogonal fields causing biases in polarimetric variable estimates. Furthermore, the electromagnetic coupling in hardware may exacerbate the cross-coupling effects. To address this problem, a pulse-to-pulse phase coding in either the horizontal or vertical ports of the transmission elements has been proposed. However, it does not affect the scan-dependent system biases in PPAR estimates which require corrections via calibration mechanisms. Further, the cross-coupling signals are proportional to the cross-polar pattern power levels, rendering mitigation effective only at steering angles where these levels are sufficiently low (e.g., approximately less than ~-25 dB). In that regard, any approach that augments the number of such steering angles benefits the cross-coupling mitigation effectiveness. Herein, a simple approach that has a potential to achieve this via antenna tilt is presented.","PeriodicalId":15074,"journal":{"name":"Journal of Atmospheric and Oceanic Technology","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45813300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0