Remote-sensing is the practice of recording objects or environmental phenomena (sensing) from a far-away place (remote). So, satellite remote-sensing refers to the practice of using satellites or drones to collect information about objects or remote phenomena within the instantaneous-field-of-view (IFOV) of a sensor system. The sensor system, of course, is located on the satellite, space shuttle, rocket, or drone.
Basically, the sensor on a satellite platform records the electromagnetic energy reflected by the object or target. There are two types of sensors. Passive sensors are used when naturally-occurring energy is available (for example, when the sun is shining during the day). Active sensors, on the other hand, can be used at any time of the day or night. These sensors work by emitting radiation towards the target in question. Reflected radiation from the target is then measured by the sensor.
The sensors record radiation all across the electromagnetic spectrum; unlike the human eye (which can only detect visible light), these special sensors can detect infrared and ultraviolet light. The reflected radiation from the target object is then turned into images and used as a surrogate for the actual target. Invisible light such as infrared or ultraviolet light are represented by different colors in satellite images. In order to interpret these images, scientists turn to visual or digital image processors. This is the basic process of acquiring data through remote-sensing satellite technology.
An example of how remote-sensing technology can benefit daily life is in the area of hurricane or storm forecasting. Since tropical hurricanes and cyclones often cost billions of dollars in property damage and the loss of countless lives, remote-sensing technology is crucial to public safety. Gathered data over decades has allowed scientists to forecast when these dangerous storms will make landfall; this allows the public to prepare and to leave affected areas before they do. Scientists can also track, examine, and study these decades of satellite data to determine patterns of hurricane and storm formation.
For more on the uses of remote-sensing satellite technology, please refer to the links below.
https://www.mtu.edu/geo/research/hazard-data/
https://www.nrcan.gc.ca/maps-tools-publications/satellite-imagery-air-photos/remote-sensing-tutorials/introduction/passive-vs-active-sensing/14639
https://www.ssec.wisc.edu/news/articles/8691
Friday, July 20, 2012
Outline the acquisition of data through the technology of satellite remote-sensing and provide one example of the application of remote-sensing technology in everyday life.
Subscribe to:
Post Comments (Atom)
Summarize the major research findings of "Toward an experimental ecology of human development."
Based on findings of prior research, the author, Bronfenbrenner proposes that methods for natural observation research have been applied in ...
-
One way to support this thesis is to explain how these great men changed the world. Indeed, Alexander the Great (356–323 BC) was the quintes...
-
Polysyndeton refers to using several conjunctions in a row to achieve a dramatic effect. That can be seen in this sentence about the child: ...
-
Both boys are very charismatic and use their charisma to persuade others to follow them. The key difference of course is that Ralph uses his...
-
Equation of a tangent line to the graph of function f at point (x_0,y_0) is given by y=y_0+f'(x_0)(x-x_0). The first step to finding eq...
-
At the most basic level, thunderstorms and blizzards are specific weather phenomena that occur most frequently within particular seasonal cl...
-
Population policy is any kind of government policy that is designed to somehow regulate or control the rate of population growth. It include...
-
Gulliver cooperates with the Lilliputians because he is so interested in them. He could, obviously, squash them underfoot, but he seems to b...
No comments:
Post a Comment