What are the different types of resolution in remote sensing?

What are the different types of resolution in remote sensing?

In remote sensing we refer to three types of resolution: spatial, spectral and temporal.

What is meant by spectral resolution?

Spectral resolution refers to the number and dimension of specific wavelength intervals of electromagnetic radiation that a sensor is capable of measuring. The portions (ranges) of the spectrum to which an instrument is sensitive are referred to as its bands.

How do you find the spectral resolution?

Spectral resolution is usually quoted either in terms of Δλ (usually in units of nm or Å) or in terms of the dimensionless quantity: R = λ / Δλ. As a rough guide, spectrographs with R < 1000 are regarded as low resolution and they generally do not allow the spectral lines from astronomical sources to be resolved.

Why is spatial resolution important in remote sensing?

For some remote sensing instruments, the distance between the target being imaged and the platform, plays a large role in determining the detail of information obtained and the total area imaged by the sensor.

What are the types of resolution?

Three forms of resolutions are available: ordinary resolution, special resolution, and unanimous resolution. There is no concept of special resolutions in Board meetings, and very few unanimous resolutions are also required. However, all three are covered in the case of general meetings.

Is GIS remote sensing?

A geographic information system (GIS) is a computer-based tool for mapping and analyzing features and events on earth. On the other hand, remote sensing is the science of collecting data regarding an object or a phenomenon without any physical contact with the object. …

How does remote sensor work?

Remote sensors collect data by detecting the energy that is reflected from Earth. These sensors can be on satellites or mounted on aircraft. For example, a laser-beam remote sensing system projects a laser onto the surface of Earth and measures the time that it takes for the laser to reflect back to its sensor.

What is spectral range?

The wavelength range (also called spectral range) is the range of wavelengths that each spectrometer can measure. Wavelength range is based on the spectrometers grating’s ability to disperse onto the detector array. It is determined by the groove density of the grating and the physical size of the detector.

What is spectral resolution?

Spectral resolution represents the spectral band width of the filter and the sensitiveness of the detector.

What is spectral remote sensing and how does it work?

Spectral remote sensing data are collected by powerful camera-like instruments known as imaging spectrometers. Imaging spectrometers collect reflected light energy in “bands.” A band represents a segment of the electromagnetic spectrum. You can think of it as a bin of one “type” of light.

What is the Moderate Resolution Imaging Spectrometer (MODIS)?

The Moderate Resolution Imaging Spectrometer (MODIS) instrument is another satellite based instrument that continuously collects data over the Earth’s surface. MODIS collects spectral information at several spatial resolutions including 250m, 500m and 1000m.

How much better is the spectral resolution compared to Iasi?

Improvement of the spectral resolution by a factor of 2 compared to IASI is shown in full lines. Adapted from Crevoisier, C., Clerbaux, C., Guidard, V., et al. (2014). Towards IASI-new generation (IASI-NG): Impact of improved spectral resolution and radiometric noise on the retrieval of thermodynamic, chemistry and climate variables.

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