THE RATIO OF DigitalNumber VALUES OF CORRESPONDING PIXELS IN HYPERSPECTRAL REMOTE SENSING IS CALLED BAND RATIO
We can look for it by using these tecniqes. •Seeing it in rocks (meteorites) •Seeing it gravitationally •Seeing it spectroscopically (remote sensing) •Seeing morphological features of it (remote sensing) •Seeing it (remote sensing)
The Ku-band (12-22 GHz frequency, 2 cm wavelength) is much stronger than the the other bands (x, c, l). With its high capability it is used to study the properties of sea ice and thinner snow, where there is weaker response by the other bands. Using Ku-band , we get a stronger backscattered radiation from the surface and hence the surface type properties could be studied more in detail.
There are a few field studies that sensing cannot put together. Some of the studies are space and earth.
The advantages of remote sensing include the ability to collect information over large spatial areas; to characterize natural features or physical objects on the ground; to observe surface areas and objects on a systematic basis and monitor their changes over time;
In addition to remote sensing data, cartographers also use ground surveys, GPS technology, aerial photography, and geographic information systems (GIS) to collect data for making maps. These methods help ensure accuracy and provide additional layers of information that can be used for mapping purposes.
Band ratio is a technique used in remote sensing that involves dividing the value of one spectral band by another to enhance certain features in the data. By creating ratios of bands, specific information about objects or materials in the scene can be highlighted, such as vegetation health, soil moisture content, or mineral composition. These ratios can help in identifying and mapping different land covers and understanding the underlying properties of a target area.
remote sensing
Remote sensing can detect vegetation in the red wavelengths because chlorophyll, the pigment responsible for photosynthesis in plants, absorbs light most efficiently in the red part of the spectrum. This absorption leads to a decrease in reflectance in the red band, making vegetation appear red in remote sensing imagery.
Remote Sensing Center was created in 2006-09.
Indian Institute of Remote Sensing was created in 1966.
Pakistan Remote Sensing Satellite was created in 2011.
Explain how the remote sensing satellites examined the earth from the space?
What are some non-satellite remote sensing technology?
The platforms that harbor remote sensing sensors (eg. cameras) are called remote sensing platforms. In earlier days, during military reconnaissance, pigeons attached with cameras were made to fly over areas of interest. In this case the platform is the bird. Balloons, airplanes and satellites that carry remote sensing sensors are examples of remote sensing platforms.
A mapmaker might use active remote sensing over passive remote sensing because active remote sensing provides its own source of energy to illuminate the target, allowing for more control over the data collected. This can result in better resolution and accuracy in mapping features of interest.
Active remote sensing uses its own electromagnetic radiation and use microwaves. It maps areas hard to map.
Optical remote sensing is affected by cloud covers , rain etc but microwave remote sensing is not.However the optical sensors always need sun as a source of illumination while active microwave sensors don't need.