What is Ifov in remote sensing?
IFOV (Instantaneous Field of View) Definition. IFOV (Instantaneous Field of View) A measure of the spatial resolution of a remote sensing imaging system. Defined as the angle subtended by a single detector element on the axis of the optical system.
How is Ifov different from spatial resolution?
The IFOV characterizes the sensor, irrespective of the altitude of the platform. The field of view (FOV) is the total view angle that defines the swath. So, the spatial resolution of 20m for SPOT HRV means that each CCD element collects radiance from a ground area of 20mx20m.
What is spatial resolution in remote sensing?
Spatial Resolution refers to the size of the smallest feature that can be detected by a satellite sensor or displayed in a satellite image. For example, a spatial resolution of 250m means that one pixel represents an area 250 by 250 meters on the ground.
Why is spatial resolution important in remote sensing?
For some remote sensing instruments, the distance between the target being imaged and the platform, plays a large role in determining the detail of information obtained and the total area imaged by the sensor.
What does high spatial resolution mean?
In terms of digital images, spatial resolution refers to the number of pixels utilized in construction of the image. Images having higher spatial resolution are composed with a greater number of pixels than those of lower spatial resolution.
Why is spatial resolution importance in remote sensing?
Remote sensing images with high spatial resolution significantly enhance the structural information of vegetation, making it possible to utilize the spatial combination features of ground objects.
What is the importance of spatial resolution?
Spatial resolution is important as it influences how sharply we see objects. The key parameter is not simply the number of pixels in each row or column of the display, but the angle subtended, , by each of these pixels on the viewer’s retina.
What is the definition of IFOV in remote sensing?
IFOV (Instantaneous Field of View) A measure of the spatial resolution of a remote sensing imaging system. Defined as the angle subtended by a single detector element on the axis of the optical system. IFOV has the following attributes: Solid angle through which a detector is sensitive to radiation.
How does the IFOV affect the spatial resolution?
The IFOV and the distance from the target determines the spatial resolution. A low altitude imaging instrument will have a higher spatial resolution than a higher altitude instrument with the same IFOV.
How is the field of view of a remote sensing system measured?
A measure of the spatial resolution of a remote sensing imaging system, it is often expressed as dimensions of visible ground area, for some known sensor altitude. Single pixel IFOV is closely related to concept of resolved pixel size, ground resolved distance, ground sample distance and modulation transfer function .
How is the IFOV of an optical system defined?
Defined as the angle subtended by a single detector element on the axis of the optical system. IFOV has the following attributes: Solid angle through which a detector is sensitive to radiation. The IFOV and the distance from the target determines the spatial resolution.