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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...

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Related Experiment Video

Updated: Jul 12, 2026

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants
09:36

The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants

Published on: May 8, 2015

A three-band hand-held radiometer for field use.

C J Tucker, W H Jones, W A Kley

    Science (New York, N.Y.)
    |January 16, 1981
    PubMed
    Summary

    A new portable radiometer was developed for field use, collecting ground-truth data for remote sensing. This device successfully gathered data in laboratory and field tests, proving its effectiveness for in situ studies.

    Area of Science:

    • Remote Sensing
    • Geophysics
    • Instrumentation

    Background:

    • Accurate ground-truth data is crucial for validating satellite imagery and remote sensing studies.
    • Existing field radiometers may lack portability, specific spectral configurations, or in situ capabilities.

    Purpose of the Study:

    • To design and construct a self-contained, hand-held radiometer for field deployment.
    • To enable the collection of ground-truth data for Landsat-D's thematic mapper.
    • To facilitate ground-based, remote-sensing studies of natural materials.

    Main Methods:

    • A 4.5-kilogram device was built with a strap-supported electronics module and a hand-held probe.
    • The radiometer incorporates two silicon and one lead sulfide detector, spectrally configured to thematic mapper bands TM3, TM4, and TM5.

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    Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
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    Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data

    Published on: December 12, 2013

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    The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants
    09:36

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    Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
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    09:55

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    Published on: December 12, 2013

  • Sample-and-hold radiometric sampling and liquid-crystal displays were integrated for data acquisition.

    • Main Results:

    • The prototype radiometer was extensively tested under both laboratory and field conditions.
    • Satisfactory results were obtained, indicating the device's reliable performance.
    • The instrument demonstrated its capability to collect relevant ground-truth data.

    Conclusions:

    • The developed hand-held radiometer is a viable tool for field-based remote sensing.
    • The device meets its design objectives for collecting ground-truth data and supporting in situ studies.
    • Further use of this instrument can enhance the accuracy of remote sensing applications.