Remote sensing can be defined as process of obtaining information without any contact with object. In this process, it undergoes several steps for obtaining required output. They include energy source, propagation of energy, interaction of energy, reflectance of energy, transmission and usage of data.

Polar orbiting satellites are also known as sun-synchronous satellites, which are generally placed at an altitude range of 700-1500km from ground level. These are able to deliver accurate information about object which we need access to.

When emissivity is zero, reflectance value would be equal to one, which means total energy incident on object is reflected and recorded by system. Best example for this case is snow.

The EM wave field uses both electric and magnetic fields, which will form a complex wave structure. Electric field is placed in vertical manner and magnetic field in horizontal manner.

Infrared region has been classified into rmal IR and reflected IR. Thermal IR is equipped with optical mechanical scanner and a special system which is free from a film produces images by using wavelengths of range 3-5 micrometer.

LISS-III also known as Linear Imaging Self Scanning Sensor is mounted on Indian satellite IRS-1A. It is capable of operating three bands, which comprises one visible ray, near IR and in short wave IR regions.

Remote sensing is process of obtaining information without any contact with object. This includes using its own source of energy or using anor source for reflecting and absorbing. The classification includes active and passive remote sensing.

The reflectance can be given as ratio of reflected energy by incident energy, which is given as E_R? / E_?. On substitution, we get
43 / 87 = 0.49 is reflectance value.

EM waves used two major sources of fields i.e., electric and magnetic fields. Both are placed orthogonal to each or in a wave pattern. The electric components are placed in vertical manner and magnetic components in horizontal manner.

From plank?s law, \(M = C_1 / (?^5*e^{(\frac{c_2}{?T})-1})\). Here, C1 and C2 are radiation constants. On substitution, we get
M = 3.74*10¹⁶ / \((765^5*e^{(1.43*\frac{10^2}{456*765})-1})\)
M = 3.6*10³⁰ W / sq. m.