Bookhagen, Bodo Geography Department, University of California, Santa Barbara, California.
- Remote-sensing principles
- Remote-sensing devices, satellite platforms, and applications
- Links to Primary Literature
- Additional Readings
The recording of information about objects by the use of a device not in physical contact with the object. The word remote is derived from the Latin word remotus and describes an object situated at some distance away. Remote sensing (RS) devices are commonly mounted on a satellite, spacecraft, airplane, buoy, or ship and can use the full electromagnetic spectrum from short-wavelength ultraviolet (UV) light through visible, infrared, and microwave wavelengths to detect properties of distant objects or areas. The devices measure an object's transmission of electromagnetic energy from reflecting and radiating surfaces. One of the major characteristics of a remotely sensed image is the wavelength region of the electromagnetic spectrum that it represents. Some remote-sensing images are digital representations of reflected solar radiation in the visible and the near-infrared parts of the electromagnetic spectrum; others are based on the energy emitted by the Earth's surface, which emits thermal infrared wavelengths. The energy measured in the microwave region is transmitted from the RS device (for example, radar) and is generally known as active remote sensing, because the energy source is provided by the remote-sensing platform. Passive remote sensing denotes systems that depend upon an external energy source, such as the Sun. In addition to electromagnetic radiation, some remote-sensing devices use force fields (for example, gravity) or acoustic energy (for example, sonar) to deduce information about an object or area.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information