射电天文学类外文文献毕业论文（期刊论文，学位论文）包含哪些？

本文是为大家整理的射电天文学主题相关的10篇外文毕业论文文献， 包括5篇期刊论文，5篇学位论文，为射电天文学选题相关人员撰写毕业论文提供参考。

1.[期刊论文]A Low Cost 4 bit 16 Giga-sample-per-second Analog-to-digital Converter for Radio Astronomy

标题翻译:低成本4位16千兆 - 用于射电天文学的每秒模数转换器模数转换器

期刊：《Publications of the Astronomical Society of the Pacific》 | 2020 年第 1014 期

摘要：In this study, a 4 bit, 16 giga samples per second analog-to-digital converter (ADC) printed circuit board assembly (PCBA) was designed, manufactured, and characterized for digitizing signals from radio telescopes. For this purpose, an Adsantec ANST7123-KMA flash ADC chip was used. Because this design of chip is not followed the serial ADC JESD204 standard completely, we used a novel channel bonding scheme developed in our previous project for the high-speed serial data input alignment. The PCBA was equipped with a field-programmable gate array (FPGA) mezzanine card (FMC) connector. FMC allowed us to use the FPGA evaluation board by Xilinx as the testing platform. The PCBA enables data acquisition with a wide bandwidth and simplifies the i大行sp8ntermediate frequency section. In the current version, the PCBA and the chip exhibit an analog bandwidth of 16 GHz, which facilitates a second Nyquist sampling. The following minimum to maximum performance parameters were obtained from the first and second Nyquist zones: a spurious-free dynamic range of 18-33 dB and an effective number of bits of 2.1-3.7 bits. The board will be ported to the Collaboration for Astronomy Signal Processing and Electronics Research environment, which is open for use by non-profit scientific teams, including the Event Horizon Telescope.

摘要翻译：在该研究中，设计了4位，每秒16个GIGA样本，每个模数转换器（ADC）印刷电路板组件（PCBA）设计，制造，并表征用于从无线电望远镜数字化信号。为此目的，使用ADSANTEC ANST7123-KMA闪存ADC芯片。由于芯片的这种设计并不完全串行ADC JESD204标准，我们使用了我们以前的项目开发了新的通道粘接方案，以实现高速串行数据输入对齐。 PCBA配备了现场可编程门阵列（FPGA）夹层卡（FMC）连接器。 FMC允许我们使用Xilinx的FPGA评估板作为测试平台。 PCBA使数据采集能够具有宽带宽，并简化中频部分。在当前版本中，PCBA和芯片表现出16 GHz的模拟带宽，这有助于第二个Nyquist采样。从第一和第二奈奎斯特地区获得以下最小最小性能参数：18-33 dB的无尺寸动态范围，有效的2.1-3.7位。董事会将移植到天文学信号加工和电子研究环境的合作，该环境开放，供非利润科学团队使用，包括活动视线望远镜。

关键词：Radio astronomy

关键词翻译：射频天文学

链接：www.zhangqiaokeyan/journal-foreign-detail/0704024647623.html

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2.[期刊论文]An International Survey of Front-end Receivers and Observing Performance of Telescopes for Radio Astronomy

标题翻译:射电天文学望远镜前端接收者的国际调查与望远镜

期刊：《Publications of the Astronomical Society of the Pacific》 | 2019 年第 1002 期

摘要：This paper presents a survey of microwave front-end receivers installed at radio telescopes throughout the world. This unprecedented analysis was conducted as part of a review of front-end developments for Italian radio telescopes, initiated by the Italian National Institute for Astrophysics in 2016. Fifteen international radio telescopes have been selected to be representative of the instrumentation used for radio astronomical observations in the frequency domain from 300 MHz to 116 GHz. A comprehensive description of the existing receivers is presented and their characteristics are compared and discussed. The observing performances of the complete receiving chains are also presented. An overview of ongoing developments illustrates and anticipates future trends in front-end projects to meet the most ambitious scientific research goals.

摘要翻译：本文介绍了全球广播电视望远镜的微波前端接收器的调查。 这一前所未有的分析作为意大利广播望远镜的前端发展审查的一部分，由意大利国家天体物理学研究所在2016年启动。已选择十五张国际无线电望远镜，代表用于无线电天文观测的仪器 频域从300 MHz到116 GHz。 提出了现有接收器的综合描述，并进行了比较和讨论其特征。 还提出了观察完整接收链的性能。 持续发展的概述说明并预测了前端项目的未来趋势，以满足最雄心勃勃的科研目标。

关键词：instrumentation: detectors；telescopes

关键词翻译：仪表：探测器；望远镜

链接：www.zhangqiaokeyan/journal-foreign-detail/0704024647689.html

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3.[期刊论文]Energy-efficient data transfers in radio astronomy with software UDP RDMA

标题翻译:使用软件UDP RDMA进行射电投资最重要的事天文学中的节能数据传输

期刊：《Future generation computer systems》 | 2018 年第 PTa1 期

摘要：<ce:abstract xmlns:ce="www.elsevier/xml/common/dtd" xmlns="www.elsevier/xml/ja/dtd" id="a000005" xml:lang="en" class="author" view="all"><ce:section-title id="st000005">Abstract</ce:section-title><ce:abstract-sec id="as000005" view="all"><ce:simple-para id="sp000065" view="all">Modern radio astronomy relies on very large amounts of data that need to be transferred between various parts of astronomical instruments, over distances that are often in the range of tens or hundreds of kilometres. The Square Kilometre Array (SKA) will be the world’s largest radio telescope, data rates between its components will exceed Terabits per second. This will impose a huge challenge on its data transport system, especially with regard to power consumption. High-speed data transfers using modern off-the-shelf hardware may impose a significant load on the receiving system with respect to CPU and DRAM usage. The SKA has a strict energy budget which demands a new, custom-designed data transport solution. In this paper single是什么意思we present SoftiWARP UDP, an unreliable datagram-based Remote Direct Memory Access (RDMA) protocol, which can significantly increase the energy-efficiency of high-speed data transfers for radio astronomy. We have imple好玩的魔兽地图mented a fully functional software prototype of such a protocol, supporting RDMA Read and Write operations and zero-copy capabilities. We present measurements of power consumption and achieved bandwidth and investigate the behaviour of all examined protocols when subjec法拉利加利福尼亚ted to packet loss.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="www.elsevier/xml/common/dtd" xmlns="www.elsevier/xml/ja/dtd" id="a000010" xml:lang="en" class="author-highlights" view="all"><ce:section-title id="st000010">Highlights</ce:section-title><ce:abstract-sec id="as000010" view="all"><ce:simple-para id="sp000070" view="all"><ce:list id="l000005"><ce:list-item id="li000005"><ce:label>•</ce:label><ce:para id="p000005" view="all">Radio telescopes transfer staggering amounts of sensor data over long distances.</ce:para></ce:list-item><ce:list-item id="li000010"><ce:label>•</ce:label><ce:para id="p00001bh什么意思0" view="all">Receiving these data volumes can consume significant amounts of energy.</ce:para></ce:list-item><ce:list-item id="li000015"><ce:label>•</ce:label><ce:para id="p000015" view="all"王鱼行动;>We present our RDMA-based transport protocol, suitable for radioastronomy transfers.</ce:para></ce:list-item><ce:list-item id="li000020"><ce:label>•</ce:label><ce:para id="p000020" view="all">Our solution is capable of achieving very good power efficiency and bandwidths.</ce:para></ce:list-item><ce:list-item id="li000025"><ce:label>•</ce:label><ce:para id="p000025" view="all">We present an implementation of such protocol and results of experiments.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>

摘要翻译：<ce：抽象xmlns：ce =“ www.elsevier/xml/common/dtd” xmlns =“ www.elsevier/xml/ja/dtd” id =“ a000005” xml ：lang =“ zh-cn” class =“ author” view =“ all”> <ce：section-title id =“ st000005”>摘要</ ce：section-title> <ce：abstract-sec id =“ as000005”视图=“ all”> <ce：simple-para id =“ sp000065” view =“ all”>现代射电天文学依赖于需要在天日语初级词汇文仪器各个部分之间传输的大量数据，而这些距离通常在几十或几百公里的范围。平方公里阵列（SKA）将是世界上最大的射电望远镜，其组件之间的数据速率将超过每秒兆兆比特。这将对其数据传输系统构成巨大挑战，尤其是在功耗方面。使用现代的现成硬件进行高速数据传输可能会给接收系统带来CPU和DRAM使用方面学位英语的重大负担。 SKA拥有严格的能源预算，因此需要新的，定制设计的数据传输解决方案。在本文中，我们提出了SoftiWARP UDP，这是一种不可靠的基于数据报的远程直接内存访问（RDMA）协议，可以显着提高射电天文高速数据传输的能效。我们已经实现了该协议的功能齐全的软件原型，支持RDMA读取和写入操作以及零复制功能。我们提供功耗和已实现带宽的测量结果，并研究所有测试协议在丢包时的行为。</ ce：simple-para> </ ce：abstract-sec> </ ce：abstract> <ce：abstract xmlns ：ce =“ www.elsevier/xml/common/dtd” xmlns =“ www.elsevier/xml/ja/dtd” id =“ a000010” xml：lang =“ zh-CN “ class =” author-highlights“ view =” all“> <ce：section-title id =” st000010“>突出显示</ ce：section-title> <ce：abstract-sec id =” as000010“ view =”全部“> <ce：simple-para id =” sp000070“ view =” all“> <ce：list id =” l000005“> <ce：list-item id =” li000005“> <ce：label>•</ ce ：label> <ce：para id =“ p000005” view =“ all”>射电望远镜在远距离传输惊人数量的传感器数据。</ ce：para> </ ce：list-item> <ce：list-item id =“ li000010”> <ce：label>•</ ce：label> <ce：para id =“ p000010” view =“ all”>接收这些数据量会消耗大量能量。</ ce：para> </ ce：list-item> <ce：list-item id =“ li000015”> <ce：label>•</ ce：label> <ce：para id =“ p000015” view =“ all”>我们提出我们基于RDMA的传输协议，适用于射电天文传输。</ ce：para> </ ce：list-item> <ce：list-item id =“ li000020”> <ce：label>•</ ce：label> <ce：para id =“ p000020” view =“ all”>我们的解决方案能够实现非常好的电源效率和带宽。</ ce：para> </ ce：list-item> <ce：list-item id = “ li000025”> <ce：label>•</ ce：label> <ce：para id =“ p000025” view =“ all”>我们介绍了该协议的实现和实验结果。</ ce：para> < / ce：list-item> </ ce：list&攀岩墙gt; </ ce：simple-para> </ ce：abstract-sec> </ ce：abstract>

关键词：RDMA；Power efficiency；Radio astronomy

关键词翻译：RDMA；功率效率；射电天文学

链接：www.zhangqiaokeyan/academic-journal-foreign_future-generation-computer-systems_thesis/0204110513907.html

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4.[期刊论文]Inroduction to the Techniques of Interferometry and Lunar Occultation in Radio Astronomy

标题翻译:射电天文学中的干涉测量和月球掩星技术简介

什么时候容易怀孕期刊：《Resonance》 | 2018 年第 12 期

摘要：Radio telescopes allow a 24 × 7 observation time window ofthose regions of the space which appear dark in the visibleregion. But, the major problem with a single radio telescopeis its poor resolution. In this article, the method of interferometryin radio astronomy is discussed by citing the exampleof a two-element interferometer. Interferometry providesimproved resolution.With a single telescope as well, the resolutioncan be improved for the radio sources along the eclipticwhich are smaller in angular spread as compared to theMoon. The theoretical principle behind the technique of occultationis discussed using its optical analog of diffraction.

摘要翻译：射电望远镜允许对空间中高锰酸钾那些在可见区域中显得较暗的区域进行24×7的观察时间窗口。但是，单个射电望远镜的主要问题是分辨率低。本文以二元干涉仪为例，讨论了射电天文中的干涉测量方法。干涉仪提供了更高的分辨率。同样，使用单筒望远镜，与月球相比，沿黄道的角度扩展较小的无线电源的分辨率也可以提高。掩盖技术的理论原理是使用其绕射光学类似物进行讨论的。

关键词：EM spectrumantennaJanskyinterferometer arraybaselinecorrelatorFourier transformlunar occultationFresnel diffractionconvolution.

关键词翻译：电磁频谱天线詹斯基干涉仪阵列基线相关器傅立叶变换月球掩星菲涅耳衍射卷积。

链接：www.zhangqiaokeyan/academic-journal-foreign_detail_thesis/0204116360602.html

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5.[期刊论文]Radio Astronomy and the Giant Metre-Wave Radio Telescope

标题翻译:射电天文学和巨型波射电望远镜

期刊：《Resonance》 | 2018 年第 2 期

摘要：The cosmos is strange and beautiful, full of unanticipated objects.The only way to understand it is to observe it – in asmany different ways as possible. In this article, we take alook at the wonders revealed upon observing radio emissionsfrom celestial objects through the Giant Metre-wave RadioTelescope (GMRT), near Pune, India.

摘要翻译：宇宙是奇异而美丽的，充满了意料之外的物体。了解它的唯一方法是观察它-尽可能以多种不同的方式进行观察。在本文中，我们将观察通过印度普那附近的巨型波无线电望远镜（GMRT）观测天体的无线电发射而发现的奇观。

链接：www.zhangqiaokeyan/academic-journal-foreign_detail_thesis/0204116359542.html

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6.[学位论文]High-Precision Calibration and Reduction Techniques for Molecular Line Emission in Radio Astronomy & Their Application to the Galactic Chemical Evolution of Silicon

标题翻译:射电天文学中分子线发射的高精度校正和还原技术及其在硅银化学演化中的应用

著录项

年度：2019

链接：www.zhangqiaokeyan/academic-degree-foreign_mphd_thesis/02061788193.html

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7.[学位论文]New Technologies Driving Decade-Bandwidth Radio Astronomy: Quad-Ridged Flared Horn & Compound-Semiconductor LNAs.

标题翻译:推动十年带宽射电天文学发展的新技术：四边喇叭形喇叭和复合半导体LNA。

摘要：Among the branches of astronomy, radio astronomy is unique because it spans the largest portion of the electromagnetic spectrum, e.g., from about 10 MHz to 300 GHz. On the other hand, due to scientific priorities as well as technological limitations, radio astronomy receivers have traditionally covered about an octave bandwidth. This approach of ``one specialized receiver for one primary science goal'' is, however, not only becoming too expensive for next-generation radio telescopes comprising thousands of small antennas, but also is inadequate to answer new scientific questions which require simultaneous coverage of large bandwidths.;This thesis presents significant improvements on the state of the art of two key receiver components in pursuit of decade-bandwidth radio astronomy: 1) reflector feed antennas; 2) low-noise amplifiers on compound-semiconductor technologies.;The first part of this thesis introduces the quadruple-ridged flared horn: a flexible, dual linear-polarization reflector feed antenna that achieves 5:1--7:1 bandwidths while maintaining near-constant beamwidth. The horn is unique in that it is the only wideband antenna suitable for radio astronomy that: 1) can be designed to have nominal 10 dB beamwidth between 30 and 150 degrees; 2) requires one single-ended 50 Ω low-noise amplifier per polarization. Design, analysis, and measurements of several quad-ridged horns are presented.;The second part of the thesis focuses on modeling and measurements of discrete high-electron mobility transistors (HEMTs) and their applications in wideband, extremely low-noise amplifiers. The transistors and microwave monolithic integrated circuit low-noise amplifiers described herein have been fabricated on two state-of-the-art HEMT processes: 1) 35 nm indium phosphide; 2) 70 nm gallium arsenide. DC and microwave performance of transistors from both processes at room and cryogenic temperatures are included, as well as first-reported measurements of detailed noise characterization of the HEMTs. Design and measurements of two low-noise amplifiers covering 1--20 and 8--50 GHz fabricated on both processes are also provided, which show that the 1--20 GHz amplifier improves the state of the art in cryogenic noise and bandwidth, while the 8--50 GHz amplifier achieves noise performance only slightly worse than the best published results but does so with nearly decade bandwidth.

摘要翻译：在天文学的各个分支中，射电天文学是独一无二的，因为它跨越了电磁频谱的最大部分，例如从大约10 MHz到300 GHz。另一方面，由于科学优先级和技术限制，射电天文接收机传统上覆盖大约八度的带宽。但是，这种``为一个主要科学目标提供一个专用接收器''的方法不仅对于包括成千上万个小天线的下一代射电望远镜来说变得太昂贵了，而且还不足以回答新的科学问题，这些问题需要同时覆盖为了实现十年带宽射电天文，本论文对两个关键接收机组件的现有技术水平进行了重大改进：1）反射馈电天线； 2）采用复合半导体技术的低噪声放大器。本文的第一部分介绍了四脊喇叭形喇叭：一种灵活的双线性极化反射器馈电天线，可在保持5：1--7：1带宽的同时保持带宽近恒定束宽。该号角的独特之处在于，它是唯一适合射电天文学的宽带天线：1）可以设计为在30至150度之间具有10 dB的标称波束宽度； 2）需要一个单端50＆ohm;每个极化的低噪声放大器。提出了几种四角喇叭的设计，分析和测量方法。本文的第二部分着重于离散高电子迁移率晶体管（HEMT）的建模和测量及其在宽带，超低噪声放大器中的应用。本文所述的晶体管和微波单片集成电路低噪声放大器是通过两种最新的HEMT工艺制造的：1）35 nm磷化铟； 2）70 nm砷化镓。包括室温和低温下这两个过程的晶体管的直流和微波性能，以及首次报告的HEMT的详细噪声特性测量。还提供了在两个过程中制造的两个覆盖1--20和8--50 GHz的低噪声放大器的设计和测量结果，这些结果表明1--20 GHz放大器改善了低温噪声和带宽方面的最新技术水平，虽然8--50 GHz放大器的噪声性能仅稍差于最佳结果，但带宽却达到了近十年。

著录项

学科：Engineering Electronics and Electrical.

年度：2013

链接：www.zhangqiaokeyan/academic-degree-foreign_mphd_thesis/02061210151.html

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8.[学位论文]Probing Strongly-Scattered Compact Objects Using Ultra-High-Resolution Techniques in Radio Astronomy.

标题翻译:在射电天文学中使用超高分辨率技术探测强散射的紧凑物体。

摘要：This dissertation explores fundamental limits in radio astronomy and develops techniques that utilize the scintillation of compact objects to probe detailed properties of their emission regions and of the scattering material. I develop a statistical framework for observations with spectral resolution at or near the Nyquist limit, suitable for describing the observed statistics of strongly-scattered sources. I demonstrate that these statistics can effectively isolate the signature of an extended emission region, requiring no assumptions about the nature or distribution of the scattering material. Then, using observations of the Vela pulsar at 760 MHz with the Green Bank Telescope, I thereby achieve a spatial resolution of 4 km at the pulsar. Finally, I explore the signature of refractive scintillation on the interferometric visibility measured on long baselines, and I derive optimal correlation estimators for quantized data.

摘要翻译：本文探讨了射电天文学的基本局限性，并开发了利用紧凑物体的闪烁来探测其发射区域和散射材料的详细特性的技术。我开发了一个光谱分辨率为或接近奈奎斯特极限的观测统计框架，适用于描述强散射源的观测统计。我证明这些统计数据可以有效地隔离扩展发射区域的特征，而无需假设散射材料的性质或分布。然后，利用Green Bank望远镜在760 MHz上对Vela脉冲星的观测，我在脉冲星上获得了4 km的空间分辨率。最后，我探索了在长基线上测量的干涉可见度上折射闪烁的特征，并得出了量化数据的最佳相关估计量。

著录项

学科：Physics Astrophysics.;Physics General.;Physics Astronomy and Astrophysics.

年度：2013

链接：www.zhangqiaokeyan/academic-degree-foreign_mphd_thesis/02061201713.html

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9.[学位论文]Measurement and time domain modeling of superconductor-insulator-superconductor (SIS) mixing junctions for radioastronomy.

标题翻译:射电天文学的超导体-绝缘体-超导体（SIS）混合结的测量和时域建模。

摘要：This thesis describes the methods utilized to characterize the superconductor-insulator-superconductor (SIS) mixer used in millimeter-wave low noise radioastronomy receivers. An overview of the theory and measurement techniques is given to determine the noise contribution of double-sideband (DSB) and sideband-separating (2SB) receiver assemblies. Experimental results are shown for DSB and 2SB receivers operating in the frequency range of 84--116 GHz.; The detailed theory of the quasiparticle tunnel junction is reviewed; first, for the standard frequency domain pres犬儒主义者entation, and then, special emphasis is given to the time domain formulation. A new time-stepping algorithm, based on the voltage update method, is demonstrated in the large signal case using MATLAB. It can be used to determine the large signal voltage developed acr中间件oss the junction while accounting for the source impedance. Using this technique, the quantum mixer theory is embedded into MEFiSTo-3D Pro, a time domain electromagnetic field solver, and demonstrated for simple source impedances.

摘要翻译：本文介绍了用于表征毫米波低噪声射电天文接收机中的超导体-绝缘体-超导体（SIS）混合器的方法。概述了理论和测量技术，以确定双边带（DSB）和边带分离（2SB）接收器组件的噪声影响。显示了在84--116 GHz频率范围内工作的DSB和2SB接收机的实验结果;回顾了准粒子隧道结的详细理论；首先，对于标准频域表示，然后，特别强调时域公式。在大信号情况下，使用MATLAB演示了一种基于电压更新方法的新的时间步进算法。在考虑源阻抗的同时，它可以用来确定结点上产生的大信号电压。使用这种技术，量子混合器理论被嵌入到时域电磁场求解器MEFiSTo-3D Pro中，并针对简单的源阻抗进行了演示。

著录项

学科：Engineering Electronics and Electrical.

年度：2005

中图分类：无线电电子学、电信技术

链接：www.zhangqiaokeyan/academic-degree-foreign_mphd_thesis/02061187517.html

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10.[学位论文]A东北玩泥巴n acousto-optic上海周边游al correlation spectrometer for radio astronomy.

标题翻译:射电天文学的声光相关光谱仪。

摘要：The objective of this thesis is to develop and construct a wide-band, high resolution, two-channel prototype acousto-optic correlation spectrometer (AOCS) to analyze signals received by the three element millimeter-wave interferometer at Caltech's Owens Valley Radio Observatory (OVRO) which may be used to study the distribution of carbon monoxide and other molecules in galaxies.;Phase switching has been used to reduce the zero level variation of this instrument, and is found to be more effective than other schemes used by the single dish acousto-optical spectrometers.;Both the frequency resolution and the frequency coverage of this instrument can be changed easily, and give it a flexibility not attainable by the filter-bank spectrometers. The relative light weight and compactness of this instrument make it a good candidate for outer space applications.;An absolute calibration of the instrument has been attempted by using the system temperature as a scale for both the correlated signal received and the noise fluctuation of the instrument. A statistical method has been used to measure the various noise contributions of the instrument, which allows a very precise characterization of the zero level stability and the noise degradation of the system. The visibility loss of the present instrument was measured to be about 50%, and the noise degradation was about 40%. These losses were the results of the imperfections in the present setup. They can be improved in the future versions of this instrument.;The proposed correlation spectrometer has the main advantage of large time-bandwidth products a特殊字符nd hence of low cost per frequency channel. Thus, it is suitable for many scientific objectives that require both large bandwidt宫颈囊肿h and high resolution, such as mapping the distribution and temperature of the interstellar gases of galactic sources and extragalactic sources or studying the atmospheric conditions of planets in the solar system.;This instrument can be used to measure any RF spectrum and the cross spectrum of any two RF signals. Since it is a time integrating device, its sensitivity can be as high as one desires. With phase switching, one can compare the frequency characteristics of tw梦工厂动画o closely matched microwave devices with great sensitivity. (Abstract shortened with permission of author.)

摘要翻译：本文的目的是开发和构建宽带，高分辨率，两通道原型声光相关光谱仪（AOCS），以分析由加州理工学院欧文斯谷射电天文台（OVRO）的三元毫米波干涉仪接收到的信号），可以用来研究一氧化碳和其他分子在星系中的分布。;相移已被用来减少该仪器的零能级变化，并且被发现比单碟声子使用的其他方案更有效-光学光谱仪。该仪器的频率分辨率和频率覆盖范围都可以轻松更改，并且具有滤光片组光谱仪无法实现的灵活性。该仪器相对轻巧和紧凑，使其成为外太空应用的理想选择。；已经尝试通过使用系统温度作为接收到的相关信号和仪器噪声波动的标度来对仪器进行绝对校准。 。已经使用一种统计方法来测量仪器的各种噪声影响，这可以非常精确地表征零电平稳定性和系统的噪声衰减。经测量，本仪器的可见度损失为约50％，并且噪声衰减为约40％。这些损失是当前设置中缺陷的结果。可以在该仪器的未来版本中对其进行改进。；拟议的相关光谱仪的主要优点是时间带宽产品大，因此每频道成本低。因此，它适用于需要大带宽和高分辨率的许多科学目标，例如绘制银河源和银河外源的星际气体的分布和温度图或研究太阳系中行星的大气条件。可用于测量任何两个RF信号的任何RF频谱和交叉频谱。由于它是一种时间积分设备，因此其灵敏度可以达到人们的期望。通过相位切换，可以非常灵敏地比较两个紧密匹配的微波设备的频率特性。 （摘要经作者许可缩短。）

著录项

学科：Physics Astronomy and Astrophysics.

年度：1987

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