Sentences with word «photometer»

FIREX - Related Biomass Burning Research Using ARM Single - Particle Soot Photometer Field Campaign Report.

Other instruments aboard include the High - Speed Imaging Photometer for Occultation, which will observe objects such as planets, satellites, and asteroids as they pass in front of stars, and the German Receiver for Astronomy at Terahertz Frequencies, which will determine the chemical composition of interstellar gas clouds.

Astronomers can use photometers to precisely measure the amount of light emitted at specific wavelengths that correspond to the emission lines produced by heated chemical elements.

Abstract: We have undertaken a search for the infrared emission from the intracluster dust in the Coma cluster of galaxies by the Multiband Imaging Photometer for Spitzer.

Measurements from ground - based sun photometer networks can be used both to provide a ground - truth validation of satellite aerosol retrieval sand to produce a land - based aerosol climatology which is complementary to satellite retrievals that currently are being performed mostly over ocean.

The particle soot absorption photometer collects aerosol particles on a substrate and measures the change in light transmission relative to a reference filter.

COSTAR was not a science instrument; it was a corrective optics package that displaced the High Speed Photometer during the first servicing mission to HST.

Kepler [NASA's Kepler photometer mission] is going to be launched early next year.

To this end, the spacecraft and photometer underwent 67 days of commissioning, which included several data sets taken... ▽ More The Kepler Mission relies on precise differential photometry to detect the 80 parts per million (ppm) signal from an Earth - Sun equivalent transit.

Many improvements have been made to photographic photometers during the 20th century.

I - 0003) for 530 nm Single Analyte Meters (SAMs), allows an analyst to quickly and routinely check the performance of five different CHEMetrics photometers.

Ten of these reports were from observers using electronic equipment - video cameras and photoelectric photometers.

Each pixel on the Kepler photometer spans four times 4 arcs on the sky and each star is observed with an optimal aperture that consists of several pixels65.

In 1839, the French astronomer Dominique François Jean Arago proposed the design of a new photometer using photographic principles.

It was the first true photometer.

«Evaluation of ground - based black carbon measurements by filter - based photometers at two Arctic sites.»

Particle Soot Absorption Photometer (PSAP) Handbook.

Biomass Burning Research Using DOE ARM Single - Particle Soot Photometer (SP2) Field Campaign Report.

In each of the three bands, we have not detected a signature of the central excess component in contrast to the previous report on the det... ▽ More We have undertaken a search for the infrared emission from the intracluster dust in the Coma cluster of galaxies by the Multiband Imaging Photometer for Spitzer.

* Operate and maintain calorimeters, computer - controlled analyzers, flame photometers, spectrophotometers, and other equipment used in qualitative or quantitative analysis.

One finalist, the Spectro - Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx), will map galaxies across a large volume of the universe to find out what drove inflation, a pulse of impossibly fast expansion just after the big bang.

AAOD is derived by AERONET, a ground - based network of instruments called sun photometers that are used to calculate how much aerosols block the sun's energy as it passes through the atmosphere, and also from an Aura satellite instrument known as OMI.

The High Speed Photometer (HSP) was one of the four original axial instruments on the Hubble Space Telescope (HST).

A monitor fitted with a photometer sits on the skin surface directly above the implant, measuring the light intensity, which in turn reflects the glucose concentration.

Widder and Case then built what they called a high - intake defined - excitation bathy - photometer — or Hidex - BP, for short.

But for an Earth - size planet, you need to do 1,000 times better than that — your photometer has to be sensitive down to about 10 parts per million.

If those stars have planetary systems aligned with Kepler's line of sight, the spacecraft's photometer should be able to detect the periodic dimming caused by the planets as they transit, or pass in front of, their stars.

«The photometers that lamp manufacturers use for calibrating their devices have been produced and calibrated for incandescent lamps, which results in errors when measuring the efficacy of LEDs.

Measuring systems for optical or thermal radiation such as, e.g., radiometers, spectrometers and photometers, generate spectral distribution curves which shed light on the characteristics of the measured radiation (e.g. its luminance, its colour quality, its temperature or its wavelength).

Using an instrument called a photometer, which measures brightness very accurately, researchers can detect those dips and — from their duration and frequency — can deduce the size of the exoplanet and its orbit.

Like NASA's Kepler spacecraft, launched in 2009, the three - year - old COROT tracks the brightness of stars with a photometer, looking for periodic dimming that might be attributable to the passage of a planet across the face of its host star.

For the purpose of the study, the scientists used data from NASA's Kepler space observatory, which is equipped with a photometer capable of detecting the periodic dimming of light emitted by distant stars.

Kepler uses a very wide field telescope and a photometer (light meter) to measure brightness variations in more than 156,000 stars simultaneously [source: Ames Research Center, NASA Finds Earth - size Planet Candidates].

The SRRL is the home of the world's largest collection of radiometers in continuous operation including pyranometers, pyrheliometers, pyrgeometers, photometers, and spectroradiometers that can provide the solar resource information necessary for characterizing the performance of solar hydrogen components.

A photometer and guidance system will capture information on the presence on clouds in the atmospheres of the exoplanets and will allow the spacecraft to point to the target star with high stability and precision.

These basic detector properties are essentially unchanged from ground - based tests, indicating that the photometer is working as expected.

To this end, the spacecraft and photometer underwent 67 days of commissioning, which included several data sets taken to characterize the photometer performance.

Astronomers (professional or amateur) can measure a star's brightness (the amount of light it puts out) by using a photometer or charge - coupled device on the end of a telescope.

The brightness depends on the luminosity of the object and on the distance that separates the object from the photometer, as well as the amount of matter between the two that can obscure the object.

Herschel invented a photometer («astrometer» as he called it) that allowed the observer to visually compare the brightness of stars using a scale based on the reduced telescopic image of the Moon.

A photometer has several applications in astronomy.

Several years later, in 1916, the American astronomer Harlan True Stetson invented the first photometer that operated on this principle and most modern photometers work in the same way.

A photometer is an instrument that measures and quantifies the brightness of a celestial body (a galaxy, star, comet or planet, for example).

By using a photometer to measure the amount of light emitted at blue and red wavelengths (that is, the «colour» of the star), temperature can be estimated.