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What is the difference between active and passive remote sensing systems in geography?
Wiki User
∙ 13y ago
Active remote sensing transmits energy to allow an image to be formed.
Passive remote sensing collects energy reflected or emitted from a surface.
Active systems direct a bean of energy at a surface and analyze the energy reflected back. An example of active sensing would be a radar.
Passive systems are pretty much what the eyes see, and it's like a photograph. Passive sensing radiates visible light.
Wiki User
∙ 13y ago
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How is active remote sensing different from passive remote sensing?
Passive remote sensing picks up wave lengths of the light spectrum occurring on their own such light in photography. Active remote sensing will send out a wavelength of the spectrum and measure how it bounces back like radar.
Difference between GPS and remote sensing?
The Global Positioning System uses an array of near earth orbit satelites and a fancy radio in the hand to help you find out where on earth you are. Remote Sensing uses on satelite to take a picture from space so that Farmers can see what is growing on their land. It is also used by Governments to identify the extent and severity of damage from earthquakes, floods, volcanic eruptions.
What are the differences between ground based research methods and remote sensing research methods?
In remote sensing, aircraft or satellites provide the platforms for sensing applications. The primary difference is that in the remote sensing methods, a lot more area can becovered in a very short period of time than with ground-based methods. There are details that cannot be resolved by the remote methods that can be determined on the ground, but there are trade offs with the two methods of investigation. More and more sophisticated way of "looking" at the ground from remote platforms continue to be developed. The location of South American temples hidden in the jungle is just one example of the capability of the remote platform.
What is term for the process of gathering information through images taken at a distance?
Remote sensing
What is the opposite from remote sensing?
In situ?
Active and passive remote sensing?
Remote sensing transmits energy that allows an image to be formed. Passive remote sensing collects energy that is reflected or emitted from a surface.
How is active remote sensing different from passive remote sensing?
Passive remote sensing picks up wave lengths of the light spectrum occurring on their own such light in photography. Active remote sensing will send out a wavelength of the spectrum and measure how it bounces back like radar.
What is used to gather data in a passive remote sensing system?
gps
What has the author E C Barrett written?
E. C. Barrett has written: 'Geography from space' -- subject(s): Physical geography 'First WetNet Precipitation Intercomparison Project (PIP-1): A special issue of the journal Remote Sensing Reviews (Remote Sensing Reviews,)' 'Introduction to environmental remote sensing' -- subject(s): Earth sciences, Geography, Remote sensing
Why would a mapmaker use active remote sensing instead of passive remote sensing?
Active remote sensing uses its own electromagnetic radiation and use microwaves. It maps areas hard to map.
How do Motion Sensing Lights Work?
Motion sensing lights use a passive system that detects infrared energy. These sensors are known as PIR (passive infrared) detectors or pyroelectric sensors. Human skin averages to be 93 degrees F, which radiates infrared energy in a wavelength that is between 9 and 10 micrometers. The sensors dectect quick movement of objects that radiate between 8 to 12 micrometers of infrared energy.
What is remote senses used for?
Remote sensing is used for geography. Remote sensing is one of the tools in geography. Remote sensing is widely applied in science and day to day life.. from planning development for an area to daily weather forecasts. Images obtained from remote sensing give a bird's eye view. These images can be processed to derive information on temperature, minerals, crops, hydrology etc.
What are the subfields of geography?
Some subfields of geography include physical geography (study of natural features and processes on Earth's surface), human geography (study of human activities and their impact on the environment), environmental geography (study of interactions between humans and their surroundings), and GIS (Geographic Information Systems, which involves mapping and spatial analysis).
What is passive remote sensing?
Passive remote sensing means that the energy being collected is being provided by the environment in which you are collecting. Examples of this type of remote sensing include things as simple as taking a picture with a handheld visible spectrum camera or taking a thermal image of a person's body temperature. Active remote sensing on the other hand involves transmitting energy, allowing that energy to reflect off of the surrounding environment, and then recollecting that energy using a sensor. Examples of this type of remote sensing include sonar devices used by ships and imaging systems that use the returns from laser energy to form an image.
What has the author Courage Kamusoko written?
Courage Kamusoko has written: 'Recent advances in remote sensing and GIS in Sub-Sahara Africa' -- subject(s): Land use, Geography, Remote sensing, Geographic information systems
How can thermocouple measure the temperature?
Thermocouples are two junctions of two dissimilar metal conductors. One junction is the sensing junction and the other is the reference junction. The voltage between the two junctions depends on the temperature difference between the junctions (Seebeck effect). The voltage can be measured and the temperature difference determined based on known readings of the voltage produced by the metals. If the temperature of the reference junction is known, then the temperature of the sensing junction can be calculated.
What has the author Douglas J Wheeler written?
Douglas J Wheeler has written: 'An integrated GIS/remote sensing data base in North Cache Soil Conservation District, Utah' -- subject(s): Data processing, Agricultural geography, Artificial satellites in remote sensing
