| 词汇 | example_english_radio-telescope |
| 释义 | Examples of radio telescopeThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Recent advances include greater emphasis on experiments at optical wavelengths, and the construction of a new radiotelescope that is deliberately designed for such reconnaissance. The present capabilities of this technology allow a new type of radiotelescope to be built : an array of hundreds of small (and therefore, relatively inexpensive) antennas. It is probably the most powerful radiotelescope in the world. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Essentially, there are two types of radiotelescope. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 This dictates the dish size a radiotelescope needs for a useful resolution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Currently, it consists of nine optical telescopes and a radiotelescope, which is currently taken out of service. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In this radar astronomy procedure radio waves of known wavelength are emitted from a radiotelescope aimed at an asteroid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A typical size of the single antenna of a radiotelescope is 25 meters. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Microwave transitions are measured in the laboratory and matched to emissions from the interstellar medium using a radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, a radiotelescope in outer space might produce voluminous signal data that it can not process locally. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The near-infrared can be handled much like visible light, however in the far-infrared and submillimetre range, telescopes can operate more like a radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The radiotelescope would consist of a lander vehicle that would deploy dipoles across a 300-400 m area. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Military radar noise which is regularly occurring and of known duration can be blanked at the radiotelescope source. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It carried 1,230 kg of supplies including food, plants, mail and a 10-metre diameter radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At the time, it was the largest radiotelescope in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Unusual for a radiotelescope, the primary reflector is an off-axis segment of a paraboloid. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, not every radiotelescope is of the dish type. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At that time it was the largest radiotelescope in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The telescope being used is the world's largest single-dish radiotelescope and can receive signals from distant objects. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Pulsars were discovered in 1967 using a radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The observatory currently operates one 13.7 m diameter radiotelescope, staffed by some 20 researchers, engineers, research assistants, undergraduate and postgraduate students, and supporting personnel. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. During the twentieth century, radiotelescope observations showed that a linear feature in the nucleus was a relatively strong source of radio emission. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At the time it was built, it was the smallest radiotelescope in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Upon completion, it will be the world's largest fully steerable single-dish radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Constructed in the 1950s, it is the third largest fully movable radiotelescope in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Several other telescopes are also located at the site, which formerly included a small radiotelescope as well. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, a sufficiently sensitive radiotelescope shows a faint background glow, almost exactly the same in all directions, that is not associated with any star, galaxy, or other object. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Of course there were newly developed and operational tools (radio telescopes) designed to detect these signals. At 17 years old, with the help of his neighbor, he built a radiotelescope that won the state science fair and placed sixth in the nation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. She helped build the four-acre radiotelescope over two years and initially noticed the anomaly, sometimes reviewing as much as 96 feet of paper data per night. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. State-of-the-art instrumentation incorporated in huge ground-based radio telescopes may be able to discover these electromagnetic signatures, maybe only by means of sophisticated observational methods. One of the examples we thought of was the case of radio telescopes which, of course—to make a pun—are astronomically expensive. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Furthermore, we should not have throughout the world radio telescopes listening to try to pick up signals from intelligences in outer space. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 They include penicillin, monoclonal antibodies, which have important implications for medical research, synthetic pyrethroid insecticides, which are non-toxic to mammals, and the development of new types of radio telescopes. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 He urged the scientific community to listen with radio telescopes for signals from potential intelligent extraterrestrial life-forms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They are often used as low-noise microwave amplifiers in radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Large radio telescopes scan the intensity in the sky of particular frequencies of electromagnetic radiation which are characteristic of certain molecules' spectra. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Such systems can not be observed with more traditional means such as optical telescopes and radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Additionally, the sensitive amplifiers used in radio telescopes are cooled using liquid helium to reduce thermal noise. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With its 70-meter antenna diameter, it is among the largest single dish radio telescopes in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The distance between the radio telescopes is then calculated using the time difference between the arrivals of the radio signal at different telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With its 70m antenna diameter, it is among the largest single dish radio telescopes in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Before deploying radio telescopes to the far side, several problems must be overcome. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Non-visual amateur astronomy includes the use of infrared filters on conventional telescopes, and also the use of radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It was the largest configuration of radio telescopes in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With the help of some of the largest ground-based radio telescopes, this telescope forms the interferometer baselines extending up to 350 000 km. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Newer aperture synthesis radio telescopes are especially affected by this as they see a much larger portion of the sky and thus the ionosphere. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Alternatively, as in many radio telescopes, the final focus may be in front of the primary. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is one of the largest radio telescopes in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Maps of the regions made with radio telescopes show large connecting the two galaxies, also as a result of the encounter. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Radio telescopes are typically large parabolic (dish) antennas used singly or in an array. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Radio telescopes can also scan over the frequencies from one point in the map, recording the intensities of each type of molecule. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Digital images are also created by non-photographic equipment such as computer tomography scanners and radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the 20th century many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It has an advantage in comparison with other large radio telescopes in the fact that the complex includes powerful transmitters that allow active space experiments. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In this scientific process, the main instruments were astronomical optical telescopes (and later radio telescopes) and finally robotic exploratory spacecraft. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With their 70m antenna diameter, they are among the largest radio telescopes in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. At shorter wavelengths dish style radio telescopes predominate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Earth-based radio telescopes were able to reconstruct some of it. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Radio telescopes must have very accurate surfaces to produce high fidelity images. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Normally the participating radio telescopes function individually, working on their own specific projects. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The second stage would have two 5-meter optical telescopes and two 20-meter radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is the world's largest array of radio telescopes at metre wavelengths. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The telescope is operated in a global network with other large radio telescopes around the world in order to create an interferometric array. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This includes the use of infrared filters on conventional telescopes, and also the use of radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. With 24 optical and two radio telescopes, it is the largest, most diverse gathering of astronomical instruments in the world. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The directional resolution of any telescope is in principle limited by diffraction; for radio telescopes this is also the practical limit. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A major focus is on reduction of data from both single-dish and aperture synthesis radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Thermal noise can be made lower by cooling the circuits, but this is only usually worthwhile on radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Electron gas can undergo plasma oscillation, which is waves caused by synchronized variations in electron density, and these produce energy emissions that can be detected by using radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Many ground-based radio telescopes can study microwaves. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. On the other hand, high altitude does not offer as significant an advantage for radio astronomy at longer wavelengths, so relatively few radio telescopes are located at such sites. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Given the long wavelengths of radio waves, the reflectors of the various radio telescopes must be powerful enough so as to focus the waves at a strong resolution. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Radio telescopes are also used to collect microwave radiation, which is used to collect radiation when any visible light is obstructed or faint, such as from quasars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Some amateur astronomers use home-made radio telescopes, while others use radio telescopes that were originally built for astronomy research but have since been made available for use by amateurs. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Some songs could be considered noise music, as they include white noise and samples from radio telescopes scanning deep space (such as pulsars, radiation, supernovae, and other astronomical phenomena). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This high time resolution set it apart from many other radio telescopes of the time, as astronomers did not expect emission from an object to feature such rapid variation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The first purpose built radiotelescope went into operation in 1937. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. His 1937 radio antenna was the second ever to be used for astronomical purposes and the first parabolic reflecting antenna to be used as a radiotelescope. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Britain has extensive experience of taking special measures to protect radio telescopes from harmful interference, under the oversight of a committee including representatives of the radioastronomy community. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The cosmic microwave background radiation was also first detected using radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because radio telescopes have low resolution, they were the first instruments to use interferometry allowing two or more widely separated instruments to simultaneously observe the same source. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Voyager 1 can not be seen in visible light, but its radio signal is very bright compared to most natural things studied by radio telescopes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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