The release of harmful emissions via equipment leaks, evaporative processes, and windblown disturbances during industrial processes present potential threats to human life and health. To ensure the quality of environmental conditions, remote sensing acts as the primary method to detect and prevent these accidental leaks of harmful emissions that may occur during the manufacture and use of toxic and combustible gases.
Remote sensing is an analytical technique used to detect, classify, and obtain information for a given object or phenomenon, without bringing the sample and apparatus into direct contact. Remote sensing makes possible the collection of data in typically dangerous or inaccessible areas, and this is achieved by the application of methods that rely on emitted or reflected radiation.
Observations with Light
- Light scatter
Principles of Spectroscopy
Specific light energies interact with molecules based on fundamental properties:
- Strength of the bonds
- Electron energies
- Nuclear properties
Optical Remote Sensing
Optical remote sensing is the use of light to form images based on information collected from spectroscopic sensors to allow the visualization and analyzation of a specific chemical sample.
Common Observations with Optical Remote Sensing (ORS)
- Light scatter
- Spectral Imaging
Remote Sensing Technology
Interferometers are optical tools that can provide range and spectral data with high accuracy and precision. They have been used extensively for astronomical observations and more recently for nearfield precision ranging and spectroscopy.
Remote emission spectroscopy
The development of light dispersion technologies and observations expanded the possibilities of making qualitative and quantitative observations. It allows the determination of the composition and relative concentrations of materials based on the spectral properties of emitted light.
Remote differential absorption spectroscopy
The development of measurements based on changes in spectral features, and establishment of the Beer-Lambert mathematical model of absorption and concentration could be applied to remote sources and measurement of spectral changes probed from remote locations.
RADAR uses pulse emission of electromagnetic radiation to range and image remote objects by observing the reflected radiation.
Several spectroscopy measurement technologies have been developed to harness the speed and specificity potential of measurements based on laser technologies.
LIDAR is similar to RADAR, but used lasers to collect high definition ranging data in a line of sight range. Applications include object detection ranging and imaging, or plume and gas detection and measurement,
Multispectral and hyperspectral imaging
Imaging equipment may be equipped by various methods to collect wavelength filtered or wavelength resolved data for each pixel in the field. This provides spectral data for each pixel that can be used for primarily low-resolution spectroscopy.