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Define satellites image by referring different scholars and written documents?

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more than 4 weeks ago
Satellite imagery refers to images of the Earth or other planets taken by satellites orbiting the planet. These images are used for a variety of purposes, including mapping, monitoring weather patterns, tracking changes in the environment, and conducting scientific research.

According to the National Aeronautics and Space Administration (NASA), satellite imagery is "the use of satellite sensors to detect and record information about the Earth's surface, atmosphere, and oceans." NASA uses satellite imagery for a wide range of applications, including studying climate change, monitoring natural disasters, and tracking changes in land use.

In their book "Remote Sensing and Image Interpretation," Lillesand and Kiefer define satellite imagery as "the acquisition of information about an object or phenomenon without making physical contact with the object." They explain that satellite imagery is collected using sensors on satellites that capture electromagnetic radiation reflected or emitted by the Earth's surface.

Overall, satellite imagery is a valuable tool for scientists, researchers, and policymakers to gather information about the Earth's surface and monitor changes over time. It provides a unique perspective on the planet and allows for the analysis of large-scale environmental processes.
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more than 4 weeks ago
Definition of Satellite Image

A satellite image refers to a digital representation of a portion of the Earth's surface captured from an orbiting satellite. It is a raster image that provides information about the target area's spectral, spatial, and temporal characteristics.

Scholarly Definitions:

- According to the American Society for Photogrammetry and Remote Sensing (ASPRS), a satellite image is "an image of a portion of the Earth's surface obtained by the sensing of electromagnetic radiation from a satellite." (ASPRS 1998)

- The International Society for Photogrammetry and Remote Sensing (ISPRS) defines a satellite image as "a digital representation of the spatial distribution of electromagnetic radiation, or the reflectivity of objects in a scene, as derived from instruments on satellites." (ISPRS 2019)

Documents from Space Agencies:

- NASA: "Satellite images are pictures of Earth taken by cameras mounted on satellites. These satellites orbit the Earth, taking pictures of the planet's surface, atmosphere, and clouds. Satellite images provide valuable information about Earth's weather, climate, resources, and environment." (NASA 2020)

- European Space Agency (ESA): "Satellite images are images of Earth taken by satellites orbiting the planet. They are created by sensors on the satellites which detect different types of light coming from Earth, such as visible light, infrared light, and microwaves." (ESA 2019)

Key Characteristics of Satellite Images:

- Spectral: Captures specific bands of the electromagnetic spectrum, such as visible, near-infrared, or thermal bands.
- Spatial: Represents Earth's surface with a certain spatial resolution (pixel size).
- Temporal: Provides images acquired at regular intervals, allowing for time-series analysis.
- Geometric: Uses coordinate systems to accurately locate features on the Earth's surface.

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