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Telescope installed in Antarctica
The Degree Angular Scale Interferometer (DASI) was a telescope installed at the U.S. National Science Foundation's Amundsen–Scott South Pole Station in
Degree Angular Scale Interferometer
Degree_Angular_Scale_Interferometer
Trace radiation from the early universe
fitting in to Big Bang cosmology with cosmic inflation. The Degree Angular Scale Interferometer (DASI) was a telescope installed at the U.S. National Science
Cosmic_microwave_background
American astrophysicist
Background, and has led several experiments, including the Degree Angular Scale Interferometer, the Sunyaev-Zel'dovich Array, and the South Pole Telescope
John_Carlstrom
Branch of physics that studies mathematical models of the universe
WMAP) and many ground and balloon-based experiments (such as Degree Angular Scale Interferometer, Cosmic Background Imager, and Boomerang). One of the goals
Physical_cosmology
inflation. 2003 – The Sloan Great Wall is discovered. 2004 – The Degree Angular Scale Interferometer (DASI) first obtained the E-mode polarization spectrum of
Timeline of cosmological theories
Timeline_of_cosmological_theories
Measure of a civilization's evolution
frequencies, always in the same band. According to Kardashev, only a radio interferometer with a base, either of the order of or larger than the diameter of the
Kardashev_scale
US scientific research station at the South Pole, Antarctica
(December 2002). "Measurement of polarization with the Degree Angular Scale Interferometer". Nature. 420 (6917): 763–771. arXiv:astro-ph/0209476. Bibcode:2002Natur
Amundsen–Scott South Pole Station
Amundsen–Scott_South_Pole_Station
2007-02-08. Retrieved 2007-01-23. "PAPER a precursor to HERA". "Degree Angular Scale Interferometer". Astro.uchicago.edu. Archived from the original on 10 December
List_of_radio_telescopes
Astronomical interferometer at Llano de Chajnantor Observatory in Chile (1999–2008)
Small Array, operated on the island of Tenerife, and the Degree Angular Scale Interferometer, operated in Antarctica. Both of these experiments used radio
Cosmic_Background_Imager
Unit of length in astronomy
from 100–1000 pc−3. The observational volume of gravitational wave interferometers (e.g., LIGO, Virgo) is stated in terms of cubic megaparsecs (Mpc3)
Parsec
Clarity of vision
PMID 8870768. Only when the subtended angular velocity of the lead vehicle exceeded about 0.003 rad/s were the subjects able to scale the relative velocity Maddox
Visual_acuity
Measurement method using interference of waves
stress/strain measurement, velocimetry, optometry, and making holograms. Interferometers are devices that extract information from interference. They are widely
Interferometry
Series of cosmic microwave background experiments at the South Pole
was an unused telescope mount previously occupied by the Degree Angular Scale Interferometer. The Keck Array was built to take advantage of this larger
BICEP_and_Keck_Array
Study of the origin of the universe (structure and evolution)
the next three years, including the Very Small Array, Degree Angular Scale Interferometer (DASI), and the Cosmic Background Imager (CBI). DASI made the
Observational_cosmology
Aspect of relativity in physics
Telescope, is under development. A space-based observatory, the Laser Interferometer Space Antenna (LISA), is also being developed by the European Space
Gravitational_wave
Topics referred to by the same term
Digital Array Scanned Interferometer, or DASI, a scientific instrument for the NASA ERAST Project Degree Angular Scale Interferometer, or DASI, telescope
Dasi
Relativistic effect due to rotation
fringes, are shifted according to the angular velocity of the apparatus. In other words, when the interferometer is at rest with respect to a nonrotating
Sagnac_effect
Device used to measure gravitational waves
built and constantly improved. The present-day generation of laser interferometers has reached the necessary sensitivity to detect gravitational waves
Gravitational-wave observatory
Gravitational-wave_observatory
Lubin, Philip (1993). "Cosmic background radiation anisotropy at degree angular scales - Further results from the South Pole". The Astrophysical Journal
List of cosmic microwave background experiments
List_of_cosmic_microwave_background_experiments
Fluctuations in the energy spectrum of the microwave background
theory – Theory of the evolution of cosmological structure Degree Angular Scale Interferometer European Space Agency Science Programme Gravitational wave
Cosmic microwave background spectral distortions
Cosmic_microwave_background_spectral_distortions
Description of physical properties at the atomic and subatomic scale
is valid at ordinary scales. Quantum systems have bound states that are quantized to discrete values of energy, momentum, angular momentum, and other quantities
Quantum_mechanics
American physicist and astronomer (born 1970)
student at the University of Chicago, Kovac worked on the Degree Angular Scale Interferometer led by John Carlstrom, which in 2002 announced the first
John_M._Kovac
1887 investigation of the speed of light
lengths between the two arms of the interferometer. This path difference depends on the orientation of the interferometer relative to the aether wind. Specifically
Michelson–Morley_experiment
Quantum correlations related to wave-particle duality
Richard Q. Twiss introduced the intensity interferometer concept to radio astronomy for measuring the tiny angular size of stars, suggesting that it might
Hanbury Brown and Twiss effect
Hanbury_Brown_and_Twiss_effect
Imaging systems using changes in phase
Engineering of Cornell University, New York. They presented a crystal interferometer, made from a large and highly perfect single crystal. Not less than
Phase-contrast_X-ray_imaging
Global radio telescope array
interferometry (VLBI) stations around Earth, which form a combined array with an angular resolution sufficient to observe objects the size of a supermassive black
Event_Horizon_Telescope
Atmospheric distortions of light
twinkling Atmospheric seeing causes the fringes in an astronomical interferometer to move rapidly The distribution of atmospheric seeing through the atmosphere
Astronomical_seeing
Device for measuring a physical quantity
density-values see: Orders of magnitude (density) Durometer Holographic interferometer Laser produced speckle pattern analysed. Resonant frequency and damping
List_of_measuring_instruments
Astronomical radio interferometer in Hawaii, USA
telescopes arranged as an interferometer for submillimeter wavelength observations. It is the first purpose-built submillimeter interferometer, constructed after
Submillimeter_Array
66-telescope radio observatory in Chile
Atacama Large Millimeter/submillimeter Array (ALMA) is an astronomical interferometer of 66 radio telescopes in the Atacama Desert of northern Chile, which
Atacama Large Millimeter Array
Atacama_Large_Millimeter_Array
Telescope for observations with visible light
observations, the CCD is placed in the focal plane. Image scale (sometimes called plate scale) is how the angular size of the object being observed is related to
Optical_telescope
Quantum process reducing the variance of spin along a particular axis
squeezing is a quantum process that decreases the variance of one of the angular momentum quadratures below the standard quantum limit, at the expense of
Spin_squeezing
Supermassive black hole at the center of the Milky Way
Horizon Telescope Collaboration. The image, which is based on radio interferometer data taken in 2017, confirms that the object contains a black hole.
Sagittarius_A*
English-American physicist (born 1968)
conditions of the early universe". He was involved with the Degree Angular Scale Interferometer (DASI), and QUaD microwave background polarization experiments
Clement_Pryke
British astronomer and physicist
stellar interferometer on Sirius at the Wayback Machine (archived 3 February 2005) Nature, Vol. 178, pp. 1046 1956 Hanbury Brown et al., The angular diameters
Robert_Hanbury_Brown
Nearest star to the Solar System
Proxima Centauri is separated from Alpha Centauri by 2.18 degrees, or four times the angular diameter of the full Moon. Proxima Centauri has a relatively
Proxima_Centauri
European optical space observatory for astrometry
"Gaia" was originally derived as an acronym for Global Astrometric Interferometer for Astrophysics. This reflected the optical technique of interferometry
Gaia_(spacecraft)
Hypothetical invisible cosmic material
observed in the cosmic microwave background angular power spectrum. BAOs set up a preferred length scale for baryons. As the dark matter and baryons clumped
Dark_matter
technical challenges when performing experiments for which a Fabry-Perot interferometer are usually used in order to overcome. A Raman spectroscopy system is
Brillouin_spectroscopy
Gravitational-wave signal detected in 2017
degrees. In particular, the absence of a clear detection by the Virgo interferometer implied that the source was localized within one of its blind spots
GW170817
NASA satellite of the Explorer program
planned to use ground-based correlative measurements. The Fabry–Pérot interferometer (FPI) was a high-resolution remote sensing instrument designed to measure
Dynamics_Explorer_2
Extremely flat piece of optical-grade glass
mirrors or optical windows for special purposes, such as in a Fabry–Pérot interferometer or laser cavity. Optical flats have uses in spectrophotometry as well
Optical_flat
Analogies between Maxwell's and Einstein's field equations
Lichtenegger (2001), "Gravitomagnetism and the Clock Effect", Gyros, Clocks, Interferometers ...: Testing Relativistic Gravity in Space, Lecture Notes in Physics
Gravitoelectromagnetism
Foundational principle in quantum physics
used in an interferometer. Although some claim to have broken the Heisenberg limit, this reflects disagreement on the definition of the scaling resource
Uncertainty_principle
Brightest star in the constellation Lyra
net proper motion of Vega is 327.78 mas/y, which results in angular movement of a degree every 11,000 years. In the galactic coordinate system, the space
Vega
Taurus Brightest Star
observed using an interferometer attached to the Hooker Telescope at the Mount Wilson Observatory in 1921 in order to measure its angular diameter, but it
Aldebaran
Brightest star in Earth's night sky
radius of this star has been measured by an astronomical interferometer, giving an estimated angular diameter of 5.936±0.016 mas. The projected rotational
Sirius
Optical telescope at the Special Astrophysical Observatory in southern Russia
magnitude objects under good seeing conditions (EMCCD-based speckle interferometer – PhotonMAX-512B camera – in active use since 2007). "In contrast to
BTA-6
Active galactic nucleus (AGN) containing a supermassive black hole
small telescopes and the Lovell Telescope as an interferometer, they were shown to have a very small angular size. By 1960, hundreds of these objects had
Quasar
Ongoing NASA interstellar program
end-to-end on the lower boom. The scan platform comprises: the Infrared Interferometer Spectrometer (IRIS) (largest camera at top right); the Ultraviolet Spectrometer
Voyager_program
Industrial Engineering method
accuracy, repeatability, flatness, straightness, yaw, pitch - Laser interferometer. Angular accuracy, repeatability, runout, wobble - Autocollimator. Cycle
High performance positioning system
High_performance_positioning_system
Astronomical observatory in Southern California
Visitor Center. The Palomar Testbed Interferometer (PTI) was a multi-telescope instrument that made high-angular-resolution measurements of the apparent
Palomar_Observatory
Binary star in the constellation Scorpius
JSTOR 1650052. Pease, F. G. (1921). "The Diameter of Alpha Scorpii by the Interferometer Method". Publications of the Astronomical Society of the Pacific. 33
Antares
Quantum description of black holes
gravitational-wave astronomy. Gravitational wave observatories like the Laser Interferometer Gravitational-Wave Observatory (LIGO) have proven to be a revolutionary
Fuzzball_(string_theory)
Non-mathematical introduction
and angular momentum, that appeared continuous in the zoomed-out view of classical mechanics, turn out to be (in the very tiny, zoomed-in scale of quantum
Introduction to quantum mechanics
Introduction_to_quantum_mechanics
Polynomial sequence
is commonly used including interferogram analysis software in Zygo interferometers and the open source software DFTFringe. The first few radial polynomials
Zernike_polynomials
Measurement of the direction from which a received signal was transmitted
there are N antennas in the array, at angular spacing (squint angle) Φ, then Φ = 2π/N radians (= 360/N degrees). If the main lobes of the antennas have
Direction_finding
Fifth planet from the Sun
"Helium in Jupiter's atmosphere: Results from the Galileo probe Helium Interferometer Experiment". Journal of Geophysical Research. 103 (E10): 22815–22829
Jupiter
Intergovernmental observatory in Chile
together in groups of two or three as a giant interferometer. The ESO Very Large Telescope Interferometer (VLTI) allows astronomers to see details up to
European_Southern_Observatory
Physical characteristic of oscillating systems
light. They are also used in optical parametric oscillators and some interferometers. Light confined in the cavity reflects multiple times producing standing
Resonance
NASA space probe launched in 1977
to ensure survival throughout the entire tour. By 1972 the mission was scaled back and replaced with two Mariner program-derived spacecraft, the Mariner
Voyager_2
Branch of physics that studies light
of making precise determinations of distances or angular resolutions. The Michelson interferometer was a famous instrument which used interference effects
Optics
Wave that remains in a constant position
the form of a pair of facing mirrors, which constitute a Fabry–Pérot interferometer. The gain medium in the cavity (such as a crystal) emits light coherently
Standing_wave
Brightest star in the constellation Auriga
was published in 1994 based on observations by the Mark III Stellar Interferometer, again at Mount Wilson Observatory. Capella also became the first astronomical
Capella
Radio telescope in the Canary Islands
surrounded by large metal ground shields. As the VSA is an interferometer, it directly measures the angular power spectrum of the CMB, rather than having to construct
Very_Small_Array
Effect of general relativity
Laemmerzahl, C.; Everitt, C. W. F.; Hehl, F. W. (Eds.), Gyros, Clocks, Interferometers...: Testing Relativistic Gravity in Space. Springer, Berlin, pp. 52–82
Frame-dragging
Optical component which splits light into several beams
"Fully symmetric dispersionless stable transmission-grating Michelson interferometer". Optics Express. 28 (25): 37752–37757. Bibcode:2020OExpr..2837752K
Diffraction_grating
Bahamas to support Minuteman missile flights. MISTRAM is a sophisticated interferometer system consisting of a group of five receiving stations arranged in
MISTRAM
NASA space probe launched in 1977
to the researchers, this implies that "the density gradient is a large-scale feature of the VLISM (very local interstellar medium) in the general direction
Voyager_1
Form of electromagnetic radiation
(2002). "Differential x-ray phase contrast imaging using a shearing interferometer". Applied Physics Letters. 81 (17): 3287–3289. Bibcode:2002ApPhL..81
X-ray
Theory of interwoven space and time by Albert Einstein
(1979). "Sensitivity analysis of the Sagnac-effect optical-fiber ring interferometer". Applied Optics. 18 (6): 915–931. Bibcode:1979ApOpt..18..915L. doi:10
Special_relativity
Relativistic wave equation in quantum mechanics
} The conserved charges arising from the three rotational degrees of freedom are the angular momenta, while for the three boosts they correspond to the
Klein–Gordon_equation
Upper bound to the mass of cold, nonrotating neutron stars
that different levels in the interior of the star all rotate at the same angular velocity, the mass limit is thought to increase by up to 18–20%. The idea
Tolman–Oppenheimer–Volkoff limit
Tolman–Oppenheimer–Volkoff_limit
Spectroscopic technique
typically collected and either dispersed by a spectrograph or used with an interferometer for detection by Fourier Transform (FT) methods. In many cases commercially
Raman_spectroscopy
Radio waves produced by the Sun
at other wavelengths. Producing a radio image of the Sun requires an interferometer, which in radio astronomy means an array of many telescopes that operate
Solar_radio_emission
Spanish-Argentinian physical chemist
advances in the design of the "Nanometre multi-axis manipulator with interferometer control." that later led to the success of the nanoARPES instrument
Maria_Asensio
Curved triangle with constant width
S2CID 127264210 Keto, Eric (1997), "The shapes of cross-correlation interferometers", The Astrophysical Journal, 475 (2): 843–852, Bibcode:1997ApJ...475
Reuleaux_triangle
Astronomical high energy transient pulse
team led by astrophysicists of INAF, using detections from VLA, NOEMA interferometer, and Gran Telescopio Canarias has conducted a research campaign about
Fast_radio_burst
Indian inventions
Jagadish Chandra Bose. Shearing interferometer – Invented by M.V.R.K. Murty, a type of Lateral Shearing Interferometer utilises a laser source for measuring
List of Indian inventions and discoveries
List_of_Indian_inventions_and_discoveries
Astronomical instrument for timing of the passage of stars
an event known as a culmination, while at the same time measuring their angular distance from the nadir. These are special purpose telescopes mounted so
Meridian_circle
Stephane; Giorgetta, Jean-Luc; Polack, François; Asensio, Maria C. (2013). "Interferometer-controlled soft X-ray scanning photoemission microscope at SOLEIL".
Nano-ARPES
detected by observing the Hulse–Taylor pulsar and directly by the Laser Interferometer Gravitational-wave Observatory (LIGO). Further analyses of gravitational
List of scientific publications by Albert Einstein
List_of_scientific_publications_by_Albert_Einstein
Spanish civil engineer (1852–1936)
Manuel Martínez Risco [es] requested a Michelson-type variable-distance interferometer; Juan Negrín acquired a stalagmometer; and Santiago Ramón y Cajal commissioned
Leonardo_Torres_Quevedo
Fringe hypothesis
In this experiment, two different-colored lights, with an angular separation of a few degrees at the eye, are flashed in succession. If the interval between
Quantum_mind
Exploration Rover MERLIN – Multi Element Radio Linked Interferometer. A seven-telescope radio interferometer MESSENGER – MErcury Surface, Space ENvironment,
List_of_astronomy_acronyms
NASA decadal survey mission
Cross-track Infrared Sounder (CrIS) and Infrared Atmospheric Sounding Interferometer (IASI), and imagers such as the Visible Infrared Imaging Radiometer
CLARREO
Radar system that does not transmit
interferometric images of ionospheric turbulence with an angular resolution of 0.1 degrees, while also resolving the full, unaliased Doppler Power Spectrum
Passive_radar
"aether-wind"), as it was expected in Fresnel's theory, by using an interferometer. He could not determine any relative motion, so he interpreted the result
History_of_special_relativity
British-Australian astronomer
lanterns Photonic & laser combs Photon orbital angular momentum Tunable imaging filters Fabry–Pérot interferometers Integral field spectrographs OH-suppression
Joss_Bland-Hawthorn
European space telescope that operated between 2006 - 2014
GALAH (Galactic Archaeology with HERMES) and GAIA (Global Astrometric Interferometer for Astrophysics) could of course widely benefit from these seismic
CoRoT
Indian physicist and administrator
"Surface Plasmon Polariton Band Gap-Enabled Plasmonic Mach–Zehnder Interferometer: Design, Analysis, and Application". Plasmonics. 9 (3): 527. doi:10
Ravindra Kumar Sinha (physicist)
Ravindra_Kumar_Sinha_(physicist)
Australian radio-physicist (1923–2008)
engineered and more powerful radiospectrograph and a large swept-frequency interferometer with which to observe the radio source. In September 1950, he and three
Paul Wild (Australian scientist)
Paul_Wild_(Australian_scientist)
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
Surname or Lastname
English
English : variant of Seal 1–4; it is also established as a surname in Ireland.
Girl/Female
Muslim
Utmost point, Degree
Boy/Male
Shakespearean
Henry VI, Part 2' Lord Scales.
Girl/Female
Arabic, Australian, Muslim
The Utmost; Highest Degree
Female
English
Feminine form of Latin Angelus, ANGELA means "angel, messenger."
Girl/Female
Muslim
Increase, Excess, High degree
Male
English
Short form of English Caleb, CALE means "dog" or "rabid."
Girl/Female
African, Arabic
Scale
Surname or Lastname
English
English : from Middle English sale ‘hall’, a topographic name for someone living at a hall or manor house, or a metonymic occupational name for someone employed at a hall or manor house.English : from Middle English salwe ‘sallow’ (a tree, a kind of willow), hence a topographic name for someone who lived by a sallow tree, or a habitational name from for example Sale in Greater Manchester, named from the old dative form of this word, in atte sale.French (Salé) : from Old French salé ‘salty’, hence a topographic or occupational name for someone who lived by or worked in a salt marsh, or, in a figurative sense, a nickname for an amusing or witty person.
Girl/Female
Muslim
The utmost, Highest degree
Boy/Male
American, Arabic, Australian, British, Chinese, Christian, English, Hebrew
Dog; Bold; Surname Derived from Charles; Courageous
Girl/Female
Indian
Utmost point, Degree
Female
English
English variant spelling of French Désirée, DEZIREE means "desired."
Girl/Female
Australian, French
The One Desired; Similar to Desiree; Desired; Longed for
Male
English
Variant spelling of English Daren, DERREN means "from Araines."
Surname or Lastname
English (Devon)
English (Devon) : variant of Small.
Girl/Female
Indian
Increase, Excess, High degree
Boy/Male
Hindu, Indian, Marathi
Scale Holder
Boy/Male
English American Hebrew
Bold; Surname derived from Charles.
Male
English
English name derived from Dutch Diederik, DEREK means "first of the people; king of nations."
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
Girl/Female
Hindu, Indian
God of Beauty and Wealth
Girl/Female
Tamil
Sowmiya | ஸோவà¯à®®à¯€à®¯à®¾
Beautiful, Gentle, Soft
Girl/Female
Teutonic
Glorified battle maiden.
Boy/Male
American, Australian, British, English, French
From Denmark
Girl/Female
Swedish
Strong army.
Boy/Male
Muslim/Islamic
Singular exclusive, unequalled
Girl/Female
Bengali, Indian
Wife of Sky
Biblical
strength of the sea
Boy/Male
Biblical
The head, top, or beginning.
Boy/Male
French
Old or wise ruler.
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
DEGREE ANGULAR-SCALE-INTERFEROMETER
n.
The graduated series of all the tones, ascending or descending, from the keynote to its octave; -- called also the gamut. It may be repeated through any number of octaves. See Chromatic scale, Diatonic scale, Major scale, and Minor scale, under Chromatic, Diatonic, Major, and Minor.
n.
Gradation; succession of ascending and descending steps and degrees; progressive series; scheme of comparative rank or order; as, a scale of being.
a.
Measured by an angle; as, angular distance.
n.
Three figures taken together in numeration; thus, 140 is one degree, 222,140 two degrees.
v. t.
To make angular.
n.
Hence, any layer or leaf of metal or other material, resembling in size and thinness the scale of a fish; as, a scale of iron, of bone, etc.
imp. & p. p.
of Scale
v. t.
To weigh or measure according to a scale; to measure; also, to grade or vary according to a scale or system.
a.
Without scales, or with the scales removed; as, scaled herring.
a.
Resembling a scale; also, covered with scales; scaly.
n.
A small degree or scale; miniature.
a.
Not angular.
n.
One of a series of progressive steps upward or downward, in quality, rank, acquirement, and the like; a stage in progression; grade; gradation; as, degrees of vice and virtue; to advance by slow degrees; degree of comparison.
a.
Having feathers which in form, color, or arrangement somewhat resemble scales; as, the scaled dove.
a.
Fig.: Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female.
v. t.
To strip or clear of scale or scales; as, to scale a fish; to scale the inside of a boiler.
n.
A scale insect. (See below.)
a.
Composed of scales lying over each other; as, a scaly bulb; covered with scales; as, a scaly stem.
a.
Covered or abounding with scales; as, a scaly fish.
n.
A basis for a numeral system; as, the decimal scale; the binary scale, etc.