Search results
- Dictionaryremote sensing/rɪˌməʊt ˈsɛnsɪŋ/
noun
- 1. the scanning of the earth by satellite or high-flying aircraft in order to obtain information about it.
Powered by Oxford Dictionaries
Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation. The term is applied especially to acquiring information about Earth and other planets.
Remote sensing is the process of detecting and monitoring the physical characteristics of an area by measuring its reflected and emitted radiation at a distance. Learn how satellites, aircraft, and sonar systems are used to create images of the Earth and its features, and see some applications of remote sensing.
- Orbits. Satellites can be placed in several types of orbits around Earth. The three common classes of orbits are low-Earth orbit (approximately 160 to 2,000 km above Earth), medium-Earth orbit (approximately 2,000 to 35,500 km above Earth), and high-Earth orbit (above 35,500 km above Earth).
- Observing with the Electromagnetic Spectrum. Electromagnetic energy, produced by the vibration of charged particles, travels in the form of waves through the atmosphere and the vacuum of space.
- Sensors. Sensors, or instruments, aboard satellites and aircraft use the Sun as a source of illumination or provide their own source of illumination, measuring energy that is reflected back.
- Resolution. Resolution plays a role in how data from a sensor can be used. Resolution can vary depending on the satellite’s orbit and sensor design. There are four types of resolution to consider for any dataset—radiometric, spatial, spectral, and temporal.
- Sensor Types. Remote sensing uses a sensor to capture an image. For example, airplanes, satellites, and UAVs have specialized platforms that carry sensors.
- Types of Remote Sensing. The two types of remote sensing sensors are: Passive sensors. Active sensors. ACTIVE SENSORS. The main difference between active sensors is that this type of sensor illuminates its target.
- The Electromagnetic Spectrum. The electromagnetic spectrum ranges from short wavelengths (like X-rays) to long wavelengths (like radio waves).
- Image Classification. When you examine a photo and you try to pull out features and characteristics from it, this is the act of using image interpretation.
Jun 16, 2024 · Remote sensors collect data by detecting the energy that is reflected from Earth. These sensors can be on satellites or mounted on aircraft. Remote sensors can be either passive or active.
Remote sensing is obtaining information about an object from a distance. Photography is a very common form of remote sensing. There are different ways to collect data, and different sensors are used depending on the application. Some methods collect ground-based data, others airborne or spaceborne.
Remote sensing is the science of obtaining information about objects or areas from a distance, typically from aircraft or satellites. A LIDAR (Light Detection and Ranging) image created with data collected by NOAA's National Geodetic Survey.
