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analysis Dictionary Terms

spectrography
The production and analysis of spectra with the use of a spectrograph.
microscopy
Microscopy is a scientific technique that involves the use of microscopes to observe and study objects that are too small to...
aberration sensor (wavefront sensor)
Designed for the function of optical wavefront analysis. Shack-Hartmann camera aberration sensors use a lens array to image...
thin lens
A concept used for purposes of preliminary calculations and analysis. In theory it is a lens whose axial thickness is zero.
mid-infrared camera
A mid-infrared camera is a type of imaging device designed to capture images in the mid-infrared (mid-IR) spectral range,...
Fizeau fringes
Fizeau fringes are interference fringes observed in an interferometer, specifically in a Fizeau interferometer. The Fizeau...
internet of things
The internet of things (IoT) refers to a network of interconnected physical devices, vehicles, appliances, and other objects...
ratiometry
Ratiometry is a technique used in various scientific fields, particularly in analytical chemistry and biochemistry, to...
contour analysis
A method in optical character recognition in which a mobile light beam scans the outlines of characters for subsequent...
scanning electron microscope
A scanning electron microscope (SEM) is a powerful imaging instrument used in scientific research, materials...
polarimetric analysis
The determination of a substance's identity or quantity through the analysis of its optical rotation. For example, the...
dynamic theory
The theoretical explanation and analysis of the interactions between electron waves and crystals used in studying electron...
Kikuchi lines
An array of spectral lines formed when a beam of electrons, striking a crystalline solid, is scattered. It is used in the...
machine vision system
A machine vision system is an integrated combination of hardware and software components designed to capture, process, and...
mirror blank
A mirror blank refers to the initial piece of material from which a mirror is made. It is typically a flat or slightly...
remote sensing
Remote sensing is a method of data collection and observation where information about objects, areas, or phenomena on...
Fourier transform spectrometer
An instrument using a Michelson interferometer, a beamsplitter, two plane mirrors and a detector to give Fourier analysis of...
optical character recognition
Optical character recognition (OCR) is a technology that is used to convert printed or handwritten text into...
angular spectrum approach
The angular spectrum approach is a mathematical and computational technique used in the field of optics to analyze and...
process control
The collection and analysis of data relevant to monitoring the rate and quality of industrial production, either...
Kramers-Kronig relation
Analysis of the reflection spectrum that allows the determination of the experimental dielectric function.
linear optics
Linear optics refers to the study and manipulation of light in a linear and deterministic manner, where the response of...
long-pass filter
A long-pass filter is an optical filter that allows longer wavelengths of light to pass through while blocking or...
attenuated total reflectance spectroscopy
Attenuated total reflectance (ATR) spectroscopy is a technique used in analytical chemistry to obtain IR spectra of samples....
laser-induced fluorescence
Laser-induced fluorescence (LIF) is a spectroscopic technique that involves using a laser to excite molecules or atoms,...
disc colorimeter
A colorimeter using a spinning disc made of different colored sections for colorimetric analysis.
2D profile sensor
A 2D profile sensor is a type of sensor used in various industrial and technological applications to measure and capture...
mixed-signal oscilloscope
A mixed-signal oscilloscope (MSO) is a type of electronic test instrument that combines the capabilities of both a...
densitometry
The detection and analysis of the transmission and reflection properties of objects and photographic images.
indium gallium arsenide camera
An InGaAs (indium gallium arsenide) camera is a type of imaging device that utilizes InGaAs sensors to capture images in the...
multichannel spectral analyzer
A spectrometric instrument that detects radiation simultaneously in multiple channels, sorts it spectrally from the deep...
virtual histology
Virtual histology refers to the use of digital technology and computational methods to simulate or recreate histological...
cyanometry
The analysis of light in the blue region of the visible spectrum.
surface analysis by laser ionization
(SALI) A type of spectroscopy in which neutral atoms or molecules are ionized by an excimer laser beam and then measured by...
ionization spectrometer
Also known as the Bragg spectrometer. A system used for the x-ray analysis of crystal structure. In the instrument, a...
single-molecule FRET
Single-molecule Förster resonance energy transfer (smFRET) is a specialized technique in biophysics and molecular...
pyroelectric infrared detector
Unlike the thermocouple or bolometer, the pyroelectric infrared detector is a current source with an output proportional to...
machine vision
Machine vision, also known as computer vision or computer sight, refers to the technology that enables machines, typically...
optical grating
An optical grating, in the context of optics and physics, refers to a device with a periodic structure of closely spaced,...
hyperspectral resolution
Hyperspectral resolution refers to the level of detail or granularity in the spectral information captured by a...
pushbroom scanning
Pushbroom scanning is a technique used in remote sensing and imaging systems, particularly in satellite and aerial sensors,...
high-content screening
Also known as HCS, an analytical method designed to collect statistically relevant amounts of quantitative data on many...
scatterometry
A measurement technique used for the rapid quantitative evaluation of surface quality based on the detection and analysis of...
matrix-assisted laser desorption/ionization
Process of analysis in which the analyte substance is distributed in a matrix before laser desorption. This method avoids...
microfluidics
Microfluidics is a multidisciplinary field that involves the manipulation and control of very small fluid volumes, typically...
excitation volume
The amount of x-rays used to penetrate and diffuse a target sample undergoing electron-probe microanalysis.
x-ray analysis
The series of processes used to identify and evaluate crystal structure by using crystalline solids to diffract x-rays. In...
modulation transfer function analysis/measurement equipment
MTF analysis/measurement equipment refers to instruments and tools used to measure and analyze the modulation transfer...
optics
Optics is the branch of physics that studies the behavior and properties of light, including its interactions with matter...
optical analysis
The mathematical evaluation of an optical system to determine and quantify its basic optical properties and image quality...
optofluidics
Optofluidics is an interdisciplinary field that combines principles from optics and fluidics to create devices and systems...
Gaussian optics
1. That branch of optics that illustrates the theory in which q is substituted for sin q in Snell's law. Effective results...
x-ray microprobe analysis
The method of acquiring characteristic x-ray spectra from microscopic samples by use of the combination of a scanning...
absorption peak
An absorption peak refers to a sharp increase or spike in the absorption of electromagnetic radiation at a particular...
scientific CMOS camera
A scientific CMOS (complementary metal-oxide-semiconductor) camera is a type of digital camera specifically designed for...
voltage contrast analysis
A nondestructive testing method for very large scale integration circuits, using a scanning electron microscope to monitor...
Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using a monochannel spectrometer, spectrograph or multichannel...
calibration reference
Any known value derived from standard analysis that serves as a reference to the accuracy of an instrument or process in...
optical coherence tomography angiography
Also known as OCT-A, optical coherence tomography angiography is an imaging technique that uses light waves to measure...
perimetry
The analysis of retinal zones in which different hues can be detected. Also called campimetry.
crystallography
The analysis of the atomic structures within crystals by means of x-ray diffraction.
holographic crystal growth analysis
The study of crystal growth from the molten stage utilizing a holographic system wherein interferometric techniques record...
design and engineering consulting services
Design and engineering consulting services refer to professional services provided by specialized firms or individuals to...
optical emission spectroscopy
In dry etching, a method of characterizing the composition of solid materials such as metal. Atoms in the OES technique are...
lateral shearing interferometer
A lateral shearing interferometer is an optical device used in interferometry to measure phase differences between two beams...
hyperspectral imaging camera
A hyperspectral imaging camera is a sophisticated imaging device capable of capturing and processing data across a wide...
isochromatic lines
1. Lines of the same color. 2. A term used in photoelastic stress analysis to refer to the interference fringes produced in...
laser spectroscopy
That part of the science involved in the study of the theory and interpretation of spectra that uses the unique...
type standards
A set of samples used in the analysis of multielement thin films.
Fried's seeing parameter
A calculated function that can be achieved experimentally with interferometric analysis of complex atmospheric altitude;...
fluoroscopy
The study and analysis of images produced by a fluoroscope.
beam profiling
Beam profiling is a technique used to characterize and analyze the spatial intensity distribution of a laser beam. It...
particle acceleration
Particle acceleration refers to the process by which charged particles, such as electrons or protons, gain kinetic energy...
intravital microscopy
Intravital microscopy is an imaging technique used to visualize biological processes within living organisms, typically in...
carbon film
In analysis, the carbon layer that is evaporation-deposited on a specimen to protect and ready it for study by electron...
spatial resolution
Spatial resolution refers to the level of detail or granularity in an image or a spatial dataset. It is a measure of the...
perfect lens
A theoretical, ideal lens capable of producing perfect images. Used as a lens design and analysis tool to image collimated...
spectrometric analysis
The analysis of spectra and their components, determined from their measurements.
vacuum ultraviolet spectroscopy
A method of spectral analysis using wavelengths between 100 and 300 nm that utilizes both emission and absorption techniques.
cryospectroscopy
The spectrographic analysis of matter that is in a cooled state. Generally, a mechanical refrigerator is used to lower the...
optical testing instrument
An optical testing instrument is a device or system used to evaluate and measure the performance, quality, and...
ultraviolet fiber optics
Ultraviolet (UV) fiber optics refers to optical fibers that are designed and optimized for the transmission of ultraviolet...
Shack-Hartmann wavefront sensor
The Shack-Hartmann wavefront sensor is an optical device used for measuring the wavefront aberrations of an optical system....
lab-on-a-chip
A lab-on-a-chip (LOC) is a miniaturized device that integrates various laboratory functions and capabilities onto a single,...
label-free
Label-free refers to a technique or method that does not require the use of additional labels, tags, or markers to detect or...
radiometallography
The analysis, by x-rays, of the crystalline structure and other properties of metals and alloys.
contextual analysis
In optical character recognition systems, the identification of a character facilitated by means of known factors governing...
Airy differential equation
The equation devised by Sir G.B. Airy for the analysis of light diffraction near a caustic surface: (d2f/dz2) - zf = 0 where...
infrared detector
An infrared detector is a device that is used to detect and measure infrared radiation, which lies beyond the visible...
atomic absorption spectroscopy
The analysis of the atomic structure of a sample by means of a source radiation that is absorbed and emitted by the sample...
chemical microscopy
The field of microscopy as applied to chemical problems and analysis.
computer-calculated diffraction pattern
The use of computer analysis in the calculation of diffraction patterns for information on the design of optical systems. In...
monochromator
A monochromator is an optical instrument used to isolate and select a narrow range of wavelengths from a broader spectrum of...
deuterium discharge lamp
A discharge lamp filled with deuterium to produce high-intensity ultraviolet radiation for use in spectroscopic analysis.
time domain
The time domain is a concept used in signal processing and analysis to describe signals in terms of their behavior over...
atomic fluorescence spectroscopy
The analysis of fluorescence emitted by discrete atoms, in flames, that have absorbed radiation from an external source. It...
ellipsometer
A spectrometer equipped with polarizing prisms and retardation plates that is used in the analysis of elliptically polarized...
spectroscopy
Spectroscopy is a technique used in the study of interactions between matter and electromagnetic radiation. It involves...
modulation spectroscopy
A method of spectral analysis in which some property of the sample is varied and the corresponding change is measured. The...
image transformation
The processing of an image or portion of an image by transform coding and analysis. Fourier, Hadamand, Kronecker and...
XYZ axes
Conventional coordinates for optical system analysis, the X-axis being the horizontal, the Y-axis the vertical and the...
fluorometry
The analysis and measurement of the fluorescence emitted by a source. Fluorometric processes are more sensitive than light...
infrared lens
An infrared lens is an optical component specifically designed and optimized for transmitting, focusing, or manipulating...
optical Fourier transform
The optical Fourier transform is a mathematical operation applied to optical signals that involves transforming a spatial...
flame spectrophotometry
The study of the reflection or transmission properties of specimens as a function of wavelength after they have been excited...
Bragg method of crystal analysis
A technique in which a beam of x-rays is directed against a crystal, the atoms of which, because of their lattice...
near-infrared spectrometer
A near-infrared (NIR) spectrometer is an analytical instrument used to measure the absorption, transmission, or reflection...
microprobe
An instrument that produces an intense, tightly focused beam of ions to stimulate emissions from a minute section of a...
laser cloud mapper
A scanning laser radar system applied to transmission and concentration analysis in three dimensions of clouds as well as...
electro-optic Fabry-Perot spectroscopy
The spectroscopic analysis of interference patterns using an electronic imaging tube with a Fabry-Perot interferometer to...
spectroheliograph
An instrument in which an image of the sun is scanned by the entrance slit of a monochromator, the exit slit simultaneously...
hyperspectral imaging
Hyperspectral imaging is an advanced imaging technique that captures and processes information from across the...
Cerenkov counter
An instrument that detects high-energy charged particles by analysis of the Cerenkov radiation that they emit.
transport theory approximations
Multiple scattering method used in biological analysis in which approximations yield simple, explicit solutions, at least...
InGaAs photodiode
An InGaAs photodiode refers to a photodetector device that is constructed using a semiconductor material composed of a...
Auger electron spectroscopy
The energy analysis of electrons released in a secondary step following initial excitation or ionization.
digital twin
A digital twin refers to a virtual representation or digital counterpart of a physical object, system, or process. This...
dichroic mirror
A dichroic mirror, also known as a dichroic beamsplitter or interference filter beamsplitter, is an optical device that...
diffraction grating
A diffraction grating is an optical component consisting of a surface with a periodic structure of equally spaced, parallel...
astronomical telescope
An astronomical telescope is a type of optical instrument designed to gather and magnify light from distant celestial...
enhanced picture archiving and communication system display
Enhanced picture archiving and communication system (PACS) display (ePAD) is a software tool used in medical imaging to...
binning
Combining adjacent pixels into one larger pixel, resulting in increased sensitivity and lower resolution, or, in image...
calorimetry
Calorimetry is a branch of science that involves the measurement of heat flow in physical or chemical processes. It...
frequency domain
The frequency domain is a concept used in signal processing and analysis to represent signals and data in terms of their...
spatial condition
The spatial distribution of incident and collected flux contained in the analysis of reflectance, transmittance or densities.
laser probe
Coherent source used for analysis of excited state species.
hematofluorometer
A photoanalytical instrument for analysis of jaundice conditions in infants that measures bilirubin (a breakdown product of...
surface-enhanced Raman scattering
Surface-enhanced Raman scattering (SERS) is a powerful analytical technique that enhances the Raman scattering signal of...
automatic optical inspection
A system for automatic industrial process control or measurement, consisting of an optical module for image acquisition, a...
light-beating spectroscopy
The spectroscopic analysis of optical line shapes and frequency shifts, using the technique of light beating; i.e., the...
spectral signature
A spectral signature, in the context of remote sensing and spectroscopy, refers to the unique pattern or characteristic...
spectrophotometer
A spectrophotometer is a scientific instrument used to measure the intensity of light at various wavelengths in the...
image processor
A device embodying a microprocessor that converts an image to digital form and then further enhances the image to prepare it...
metallography
The analysis of metal structure using an optical or electron microscope, generally with a camera, to record observations.
comparison spectrum
In analysis, a reference spectrum, having predetermined wavelengths, that is used to determine the wavelengths of another...
metal arc
The electrical arc formed between metal rods that emits the spectrum of the metal itself. Commonly used in the chemical...
multispectral imaging
Multispectral imaging is a technique that involves capturing and analyzing images at multiple discrete spectral bands within...
spectral flow cytometry
Spectral flow cytometry is an advanced flow cytometry technique that expands the capabilities of traditional flow cytometry...
atomic emission spectrometry
Spectrometric analysis of the distinct and characteristic spectra of atoms of elements. The atoms are energized to emit...
radargrammetry
The analysis of the photographs taken from the radar display of a survey aircraft and used when recording terrain that is...
whole slide imaging
Whole slide imaging (WSI), also known as virtual slide microscopy or digital pathology, is a technology that involves the...
computer vision
Computer vision enables computers to interpret and make decisions based on visual data, such as images and videos. It...
terahertz spectrometer
A terahertz spectrometer is a scientific instrument used to measure and analyze the properties of materials in the terahertz...
etching liquid
An acid used to etch the surfaces of particular materials. For glass, hydrofluoric acid is used either as a liquid or a...
data analysis display
An accurate cathode-ray tube display used to provide visual representation stored in a computer for the interpretation and...
reflective spectroscopy
Reflectance spectroscopy is a technique used to analyze the reflective properties of materials across various wavelengths of...
Bessel functions
Two formulas used in diffractometer analysis, the first giving the individual diffraction patterns of each aperture, the...
Matrix optics
The linear relationship between input and output optical fields for a given optical system or application that allows the...
photoelectron microscopy
Surface analysis by means of photon induced electron emission. PEM methods provide high lateral resolution of the observed...
near-infrared camera
A near-infrared (NIR) camera is an imaging device designed to capture images in the near-infrared region of the...
machine vision lighting
Machine vision lighting refers to the use of specific lighting techniques and equipment in the field of machine vision,...
short wavelength infrared
Short wavelength infrared (SWIR) refers to the portion of the infrared spectrum that encompasses wavelengths roughly between...
deep learning
Deep learning is a subset of machine learning that involves the use of artificial neural networks to model and solve complex...
piezoresistance
Piezoresistance is a phenomenon in materials science and physics where the electrical resistance of a material changes in...
positioning
Positioning generally refers to the determination or identification of the location or placement of an object, person, or...
astrometry
The analysis and measurement of celestial bodies, their motions and positions.
laser spark spectroscopy
A method of analysis in which a pulsed laser beam is used to heat a particle, producing a plasma, or laser spark. As the...
digital image processing
The technique by which an analog image is converted by any of several means into a finite array of points, each represented...
flow cytometry
Flow cytometry is a powerful technique used in biology and medicine for the quantitative analysis of the physical and...
atomic force microscope
An atomic force microscope (AFM) is a high-resolution imaging and measurement instrument used in nanotechnology, materials...
spectrometric oil analysis
An analytical technique used to determine, identify and localize impending malfunctions. It is based upon quantitative and...
scanning
The successive analysis or synthesizing of the light values or other similar characteristics of the components of a picture...
lens testing equipment
Lens testing equipment refers to a range of specialized tools and instruments used to evaluate the optical performance,...
time-averaged holographic interferometry
Multiple exposures of holograms, one for each position of a vibrating image, that are used for vibration analysis and that...
FTIR spectrometer
FTIR (Fourier transform infrared) spectrometer is a powerful analytical instrument used to obtain an infrared spectrum of...
optical time-domain reflectometer
An optical time-domain reflectometer (OTDR) is a specialized instrument used in optical fiber communications to characterize...
holographic interferometry
The interferometric analysis of a complex object by utilizing the three-dimensional hologram. By causing a laser beam to...
entrance slit
The entrance slit, also known simply as the slit, is an essential component in optical instruments such as spectrometers and...
high-speed motion camera
A high-speed motion camera, also known as a high-speed camera or slow-motion camera, is a specialized imaging device...
optical design software
Optical design software refers to specialized computer programs used by optical engineers, physicists, and designers to...
single molecule localization microscopy
Single molecule localization microscopy (SMLM) is a group of super-resolution microscopy techniques that surpass the...
crystal spectrometer
A device designed to measure crystal properties by analysis of crystal diffraction.
spectrochemical equipment
Equipment used for chemical analysis by investigation of the spectra formed and observed in chemical activity. Of particular...
rapid access system
A photographic camera and processing system used to form a usable record of the subject in a short time, usually a few...
solar simulation
The simulation of solar radiation in the infrared and ultraviolet spectrum for the analysis of extraterrestrial sunlight and...
Huygens principle
An analysis used for problems of wave propagation. The principle notes that each point of an advancing wavefront is the...
low-temperature spectroscopy
The analysis of structural and molecular dynamics caused by low temperature.
nuclear quadrupole resonance spectroscopy
A chemical detection technique used to measure molecules that have a magnetic dipole moment. The analysis is directed to...
dust counting microscope
A microscope that has been modified to permit the quantitative analysis of dust samples.
near-infrared spectroscopy
Near-infrared spectroscopy (NIRS) is a non-invasive analytical technique that uses the near-infrared region of the...
atomic absorption spectrometer
An atomic absorption spectrometer (AAS) is an analytical instrument used to determine the concentration of specific chemical...
spectrophotometric analysis
The detection and measurement of spectral reflectance, spectral transmittance or relative spectral emittance, relative to...
photoelectric colorimetry
The measurement and analysis of color using a photoelectric instrument having three filters with broad spectrum bands.
optical design and engineering services
Optical design and engineering services involve the development, customization, and optimization of optical systems and...
photogrammetry
Photogrammetry is a technique used to obtain accurate three-dimensional measurements of objects and environments through the...
quantum cascade laser
A quantum cascade laser (QCL) is a type of semiconductor laser that operates based on the principles of quantum mechanics....
etalon
An etalon is an optical device that consists of two parallel reflecting surfaces separated by a precise and known distance....
microspectroscope
A system composed of a prism spectroscope and compound microscope to provide the visual comparison of two spectra...
point cloud
A point cloud is a set of data points in a three-dimensional coordinate system, where each point represents a specific...
neutron radiography
The nondestructive analysis and recording of industrial components based on the absorption of relatively low-energy neutrons...
marcuse loss theory
A theoretical analysis of radiation loss from planar optical waveguides due to scattering by surface irregularities/surface...
Fourier analysis
The representation of arbitrary functions as the superposition of sinusoidal functions whereby the representations...
color sensitometry
The detection and analysis of the relative response of a material to light over the range of wavelengths.
embedded vision
Embedded vision refers to the integration of computer vision technologies into various embedded systems, devices, or...
machine vision lens
A machine vision lens is a specialized optical lens designed for use in machine vision systems, which are used for automated...
isotopically selected laser spectroscopy
A spectroscopic technique in which an excitation band absorbs laser energy resulting in an electronic transition. The...
spectrum light source
A lamp that yields a nonluminous flame; used in the spectroscopic analysis of radiation emitted by a substance placed in the...
broadband dielectric mirrors
Broadband dielectric mirrors, also known as broadband mirrors, are optical coatings designed to efficiently reflect or...
diffuse reflectance spectroscopy
Diffuse reflectance spectroscopy (DRS) is a nondestructive analytical technique used to investigate the optical properties...
atmospheric optics
The analysis of the properties of radiation, such as light, when acted upon by variations in the atmosphere. Blue and red...
emission spectrum
An emission spectrum is a graphical representation or a characteristic pattern of the wavelengths or frequencies of light...
internal standard
A material that is present or added to a sample undergoing spectroscopic analysis, to serve as an intensity reference for...
circular dichroism spectroscopy
A type of spectroscopy used extensively in the analysis of biological samples. Because most biologically synthesized...
oil-on plate
A polished plano-parallel plate that is contacted to an unpolished glass surface to permit see-through analysis of the...
micro-optical coherence tomography
Micro-optical coherence tomography (micro-OCT) is an imaging technique that is an adaptation of optical coherence tomography...
flame excitation
The use of high temperatures, between 2000 and 3000 °C, to excite emission lines from a sample in spectroscopic...
residual gas analysis
A measurement in optical thin-film coating processes whereby the gases remaining in the vacuum chamber after coating are...
photometry
Photometry is the branch of science that deals with the measurement of light, particularly in terms of its intensity and the...
optical filter
An optical filter is a device that selectively transmits or blocks specific wavelengths, or colors, of light. Optical...
molecular spectroscopy
Spectrum analysis concerned with the spectra formed by transitions in molecules.
flame photometry
A part of the spectrochemical analysis of a sample that deals with the excitation of that sample by flame analysis.
analytical photogrammetry
The use of mathematical analysis to derive solutions in the science of photogrammetry.
radial distribution method
A statistical analysis of facts obtained when the intensity of x-ray diffraction is calculated at different angles. In this...
volumetric imaging
Volumetric imaging refers to the capture, visualization, and analysis of three-dimensional (3D) information from a volume of...
fluorescence lifetime imaging
Fluorescence lifetime imaging (FLIM) is an advanced imaging technique that provides information about the lifetime of...
ocean color
Refers to the characteristic hue of the ocean according to the presence and concentration of specific minerals or...
mid-wave infrared
MWIR stands for mid-wave infrared, referring to a specific range of wavelengths within the infrared spectrum. Infrared...
fiber optic spectrometer
A fiber optic spectrometer is a device used for measuring the spectral content of light. It utilizes optical fibers to...
electron probe microanalysis
An analytical technique used to determine the nature of extremely small samples by forming the x-ray spectrum of the samples...
laser ablation
Laser ablation is a process that involves the removal or erosion of material from a target surface using laser energy. This...
digital signal processing
Digital signal processing (DSP) refers to the manipulation and analysis of signals, which are representations of physical...
x-ray analysis trial
The testing by hypothesizing a likely crystal structure, computing a test x-ray diffraction pattern and comparing this to...
remote inspection
Remote inspection refers to the process of inspecting, evaluating, or monitoring assets, equipment, infrastructure, or...
radio astronomy
The detection and analysis of naturally formed extraterrestrial electromagnetic radiation within the radio frequency range...
multiplex spectrometry
The recording and mathematical analysis of all spectral intervals of the spectrometer simultaneously.
Schumann plate
A specific type of photographic plate designed with only a small amount of gelatin to function in the extreme ultraviolet...

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