What is the Ifov?

What is the Ifov?

Instantaneous field of view or (IFOV) is an important calculation in determining how much a single detector pixel can see in terms of field of view (FOV).

How do you calculate FOV?

Field of View = Field Number (FN) ÷ Objective Magnification For instance, if your eyepiece reads 10X/22, and the magnification of your objective lens is 40. First, multiply 10 and 40 to get 400. Then divide 22 by 400 to get a FOV diameter of 0.055 millimeters.

What is spatial resolution Ifov?

Spatial resolution is a measure of the smallest object that can be resolved by the sensor, or the ground area imaged for the instantaneous field of view (IFOV) of the sensor, or the linear dimension on the ground represented by each pixel.

How do you calculate the swath of a satellite?

For the satellite problem above, what is the maximum swath width that can be viewed by the satellite? D = (2 x 500 x 6378)1/2 = 2525 km, so the swath is about equal to the maximum area of the Earth that can be viewed from horizon to horizon at the altitude of the satellite.

What is FOV and Ifov in remote sensing?

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.

Can Ifov and spatial resolution be same?

So, while a single pixel may see an area 1.7mm square at a distance of 1 meter, I can only accurately measure a 5mm square sized target at this distance. This clearly illustrates that IFOV and spatial resolutions are not the same as the Spot Measurement Size (MFOV).

How is FOV telescope calculated?

True Field of View Used in a telescope with a 1000mm prime focal length, the magnification is 40x. The true field of view is therefore 1.25-degrees (50/40=1.25). Used in our 1000mm focal length telescope this formula produces a FOV of slightly over 1.2 degrees (21.2 / 1000 = 0.0212 × 57.3 = 1.21476).

What is swath width of a satellite?

As a satellite revolves around the Earth, the sensor “sees” a certain portion of the Earth’s surface. The area imaged on the surface, is referred to as the swath. Imaging swaths for spaceborne sensors generally vary between tens and hundreds of kilometres wide.

How wide is a swath?

The swathe width depends on the blade length, the nature of the crop and the mower but is usually about 1.5 metres wide. Mowing may be done by a team of mowers, usually starting at the edges of a meadow then proceeding clockwise leaving a series of staggered swathes and finishing in the middle.