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Projects/Programs

Displaying 26 - 50 of 59

Dimensional Measurement Services

Ongoing
The Dimensional Measurement Services project promotes manufacturing innovation and U.S. industrial competitiveness by providing critical technology-enabling high accuracy dimensional measurements within an internationally accepted quality system. These measurements span the dimensional metrology

Electromagnetic Field Strength Metrology

Ongoing
NIST calibrates electrically-small field probes from 10 megahertz – 40 gigahertz. These measurements are done in facilities that are periodically compared against other National Metrology Institutes in conjunction with the Bureau International des Poids et Mesures (BIPM). This assures international

EUV Zone Plates for Compact Solar Radiometer

Ongoing
A zone plate is an optical element used to separate and focus individual wavelengths of light. The zone plate consists of small circular rings that are opaque to the light separated by gaps, which are transparent. The incident light diffracts from the zone plate at an angle that depends on the

Extreme Ultraviolet Detector Calibration Service

Ongoing
The National Institute of Standards and Technology (NIST) has a wide variety of programs for the calibration of instruments and components for space-based research in the extreme ultraviolet (EUV). Many of these programs have been in existence since the 1960s, and have provided calibration support

Fundamental Guided Wave Metrology

Ongoing
The science of microwave measurements is expanding in many different directions. There is a constant push to use higher frequencies. Signals are becoming much more complex and include modulation effects, multiport/differential signals, complex waveforms, and other unusual signal schemes. On-wafer

Hyperspectral Image Projector (HIP)

Ongoing
Remote sensing instruments and medical imagers are designed to take images composed of many spectral bands, not just the minimum three components used by common digital cameras (i.e., red, green, and blue). These images are referred to as hyperspectral because each pixel contains information for

Johnson Noise Thermometry

Completed
The NIST Gaithersburg JNT project produces data useful for verification of the International Temperature Scale of 1990 (ITS-90) over a temperature range from 500 K to 930 K. This range overlaps those covered by other thermodynamic methods, most notably the upper-most range of Acoustic Thermometry

Laser Power and Energy Meter Calibration

Ongoing
For calibrating instruments used to measure the power or energy emitted by a laser, or single photon source specially designed primary and secondary standards consisting of calorimeters, pyroelectric detectors, thermal radiometers, photodiode traps and recently superconducting nanowire single-photon

SI Length and Traceability

Ongoing
Laser interferometry, which measures distances in terms of light wavelength, provides the backbone of top-level length metrology in industry and science. This project develops techniques to facilitate the tie between interferometer-based length measurements and the SI definition of length (in terms

Lunar Spectral Irradiance (LUSI)

Ongoing
The desire to monitor and understand changes in the Earth's climate has led to increasingly challenging radiometric accuracy requirements for space-based remote sensing instruments. Low-uncertainty measurements are needed both to refine climate models and to monitor changes over decadal periods of

Magnetic Resonance Imaging (MRI) Biomarker Measurement Service

Ongoing
Biomarkers are parameters that can be quantitatively measured in-vivo and provide information on tissue health/ pathology. Phantoms are medical imaging calibration structures designed to test scanner performance, image quality, and image-based measurements.

Measurement and Sampling Standards

Ongoing
A foundational activity that crosscuts our research goals is the development of a variety of standards and test materials to support the effective operation of trace explosive and narcotic detection devices. Trace sampling issues are addressed through fundamental studies on the adhesion and

Medical: Characterization of Dosimeters Used in Computed Tomography

Completed
The Dosimetry Group of the Radiation Physics Division has an on-going collaboration with the FDA, NIH, and the Walter Reed National Military Medical Center to characterize clinical dosimeters for the purpose of monitoring the radiation dose delivered to patients during computed tomography (CT) exams

NIST/NIBIB Medical Imaging Phantom Lending Library

Ongoing
Phantoms are calibration objects that can be used to assess the accuracy, stability, and comparability of medical imaging systems. The NIST/ISMRM MRI system phantom can be used to assess scanner geometric distortion, image uniformity, signal to noise ratio (SNR), resolution, slice profile and

The NIST Standard Reference Photometer for Ozone Measurement Traceability

Ongoing
The concentration of ozone in the atmosphere continues to be an important global issue both scientifically and politically. Stratospheric ozone protects the Earth from harmful UV radiation, while tropospheric ozoneis a major health concern and contributes to global climate change as a greenhouse gas

NIST Stars

Ongoing
A wide range of scientific and technical fields will benefit from having SI traceable stellar radiometric flux measurements (SI Stars). Weather and climate research satellites could use SI Stars for on orbit calibration of their spectroradiometers and astronomers could use them to calibrate

Ocean Color

Ongoing
The primary reference instrument for the United States and most international ocean-color sensors is the Marine Optical Buoy (MOBY), an automated radiometric system operated by NOAA and deployed about 20 km offshore from Lanai, Hawaii, where the atmospheric and water conditions support utilizing

Pressure

Ongoing
Piston Gauge (29010C - 29040S) This service provides calibrated secondary standard piston gauges, calibrated electronic pressure instruments, and special tests of customer supplied piston gauges. Measurements of pressure are available for submitted calibration items for the range from 10 kPa to 280

Primary optical watt radiometer (POWR)

Ongoing
The POWR, including the detector module, was completely designed by NIST to have the versatility to grow with NIST's needs and embrace new technologies. It provides optical power measurements with uncertainties of 0.01 % ( k=1), which have been verified by an intercomparison with two other cryogenic

Radiation Protection: Support of the Navy Dosimetry Program

Ongoing
Since 2010, the U.S. Navy has adopted a personal dosimeter designated as the model DT-702/PD, which was demonstrated to have an improved accuracy, energy discrimination and a lower detection limit than prior Navy designated models such as the DT-5XX/PD and DT-6XX/PD series. This dosimeter is used to

SDO/EVE/ESP Calibration

Ongoing
The SDO satellite is the first mission in NASA's Living With a Star program, which aims to understand the connections between the Sun and Earth. In addition to the light and heat with which we are familiar, the Sun produces x-ray radiation, extreme ultraviolet light, and the solar wind which