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Related Concept Videos

Instrument Calibration01:12

Instrument Calibration

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Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
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Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
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An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
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Biomolecular Detection employing the Interferometric Reflectance Imaging Sensor IRIS
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Instrument Calibration of the Interface Region Imaging Spectrograph (IRIS) Mission.

J-P Wülser1, S Jaeggli2,3, B De Pontieu1,4

  • 11Lockheed Martin Solar & Astrophysics Laboratory, Lockheed Martin Advanced Technology Center, Org. A021S, Bldg. 252, 3251 Hanover St., Palo Alto, CA 94304 USA.

Solar Physics
|March 19, 2019
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The Interface Region Imaging Spectrograph (IRIS) mission provides calibrated solar data. This article details the evolution of IRIS data calibration methods, ensuring high-quality solar observations for researchers.

Keywords:
Instrumentation: calibration

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Area of Science:

  • Solar Physics
  • Space Science
  • Astrophysics

Background:

  • The Interface Region Imaging Spectrograph (IRIS) is a NASA mission.
  • IRIS collects high-resolution spectra and images of the Sun.
  • IRIS data covers specific ultraviolet wavelength bands.

Purpose of the Study:

  • To detail the calibration methods applied to IRIS data.
  • To describe the evolution of these calibrations over the mission's early years.
  • To serve as a resource for IRIS data users.

Main Methods:

  • Dark correction
  • Scattered light and background correction
  • Flat fielding
  • Geometric distortion correction
  • Wavelength calibration
  • Absolute throughput calibration and monitoring

Main Results:

  • IRIS data undergoes rigorous calibration.
  • Calibrations ensure data accuracy and reliability.
  • Absolute throughput is calibrated and tracked over time.

Conclusions:

  • Detailed calibration procedures enhance the usability of IRIS data.
  • Understanding calibration evolution is crucial for data interpretation.
  • This article provides essential information for IRIS data users.