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the amount of solar radiation/the surface area of atmosphere/8

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Q: What is the definition for atmospheric reflectance?
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What is the definition of reflectance curves?

The percent of energy that is reflected off a surface and back to a sensor.


What is the difference between radiance and reflectance?

Radiance is the variable directly measured by remote sensing instruments. Basically, you can think of radiance as how much light the instrument "sees" from the object being observed. When looking through an atmosphere, some light scattered by the atmosphere will be seen by the instrument and included in the observed radiance of the target. An atmosphere will also absorb light, which will decrease the observed radiance. Radiance has units of watt/steradian/square meter. Reflectance is the ratio of the amount of light leaving a target to the amount of light striking the target. It has no units. If all of the light leaving the target is intercepted for the measurement of reflectance, the result is called "hemispherical reflectance." Reflectance (or more specifically hemispherical reflectance) is a property of the material being observed. Radiance, on the other hand, depends on the illumination (both its intensity and direction), the orientation and position of the target and the path of the light through the atmosphere. With effort, many of the atmospheric effects and the solar illumination can be compensated for in digital remote sensing data. This yields something which is called "apparent reflectance," and it differs from true reflectance in that shadows and directional effects on reflectance have not been dealt with. Many people refer to this (rather inaccurately) as "reflectance." For most of the vegetation indices in this FAQ, radiance, reflectance, and apparent reflectance can be used interchangeably. However, since reflectance is a property of the target material itself, you will get the most reliable (and repeatable) vegetation index values using reflectance. Apparent reflectance is adequate in many cases. See the related link.


What are reflectance curves?

Reflectance curves show the reflectivity as a function of wavelengt.


Definition to atmoshperic movement?

The definition of atmospheric movement is the movement of air or air masses.


What has the author Jeff Dozier written?

Jeff Dozier has written: 'Landsat-D investigations in snow hydrology' -- subject(s): Landsat satellites, Snow, Hydrology, Atmospheric models, Radiative transfer, Image processing, Transmittance, Optical properties, Atmospheric correction, Reflectance, Thematic mapping, Geometric rectification (imagery), Approximation, Computation, Albedo


What is bafrdf?

Bidirectional Reflectance Distribution Function


Why was 1013.25hPa taken as standard atmospheric pressure?

It is an definition by the international organization. When the temperature is 15 centigrade degree. To measure the atmospheric pressure is 1013.25 hundred pascals.


What is the definition of thunderheads?

A dense towering vertical cloud associated with thunderstorms and atmospheric instability


What is the definition of Anticyclone?

An anticyclone is a region of high atmospheric pressure relative to the surrounding air.


What is the difference between reflection and reflectance?

as such there is no soecific difference..


High pressure system definition?

is a region where the ATMOSPHERIC at the surface of the planet is greater than its surrounding environment


What is reflectance in lighting design?

The ratio of reflected flux to incident flux. Flux - The time rate of flow. For example, volume per hour is the flux of a fluid. Reflectance also is called Light reflection Value. In lighting design, we need to consider all reflectance for proper lighting simulation to real time environment. In general, wall, floor, ceiling reflectance will be 50%,80%, 20-40%. It also depends on painting color of room