Q.1

Pick up the correct statement from the following:

  • For the same feature, the photograph taken from the satellite vertically above the aircraft, the height displacement is lesser than the the aerial photograph.
  • The scale of the aerial photograph depends upon the scale of the topography
  • The feature at the principal point has no height displacement.
  • The scale of the topography of regions of higher elevation with the same flying height, is larger than that of the area of lower elevation.
  • All of the above
Q.2

The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,

  • reduces the contrast of the image and also its sharpness
  • increases the contrast of the image but reduces the sharpness
  • increases both the contrast and sharpness
  • reduces the contrast but increases the sharpness
Q.3

The altitudinal distance of a geostationary satelite from the earth is about:

  • 26, 000 km
  • 30, 000 km
  • 36, 000 km
  • 44, 000 km
Q.4

Pick up the correct statement from the following:

  • Phase of a wave is expressed as a fraction of a period with respect to a refrence
  • Phase is usually specified by angular measure with one period being 360°
  • The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction.
  • All of these
Q.5

For C band Synthetic Aperture Radar (SAR) with Doppler band width ofHz, the coherence length lcoh is:

  • 130 km
  • 230 km
  • 250 km
  • 500 km
Q.6

Pick up the important characteristic of a target which facilitates its identification from the following:

  • spectral variation
  • spatial variation
  • temporal variation
  • polarisation variation
  • All of these
Q.7

Spatial variation in horizontal and vertical directions, is caused due to :

  • physical weathering of rocks
  • chemical weathering of rocks
  • biological'weathering of rocks
  • All of these
Q.8

Which one of the following statement is correct ?

  • Radiant energy expressed in Joules, is the energy associated with electromagnetic radiation
  • The rate of transfer of radiant energy is called flux and is expressed in watts.
  • The radiant energy which falls upon a surface, is termed as irradiance.
  • The radiant energy which falls away from the surface is termed as radient exitance and is measured in Wm-2
  • All of these
Q.9

Earth observations from a satellite platform provides :

  • synoptic view of a large area
  • constant solar zenith angles and similar illumination conditions.
  • repetitive observations of the same area with intervals of a few minutes to a few weeks
  • All of these
Q.10

Pick up the correct statement from the following:

  • Phytoplankton contains photosyn-thetically active pigment.
  • An increase of phytoplankton increases the back scattering in the green region
  • An increase of phytoplankton absorbs the bule region rapidly
  • An increase of phytoplankon decreases the back scattering in the green region
Q.11

Which one of the following geometric errors of satellite sensors is random ?

  • altitude variation
  • scan skew
  • panoramic distortion
  • earth rotation
Q.12

Geodimeter is based on :

  • propogation of modulated light waves
  • propogation of infrared radiation
  • the visible light as carrier with frequency of the order of 5 x 1014Hz
  • high frequency radio waves.
Q.13

Pick up the correct statement from the following:

  • A graphical representation of spectral reflectance versis the various growth stages of a crop, depicts a phenologic pattern
  • The changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation.
  • The degree of polarisation is a characteristic of the object which helps in the identification of the object.
  • Signatures only provide statistical nature and are not completely deterministic
  • All of these
Q.14

DGPS is based on the concept that bais errors in the position of locations in a given local area, are same if their distances are within

  • 25 km
  • 50 km
  • 75 km
  • 100 km
  • 1250 km
Q.15

Due to scan geometery of a satellite sensor:

  • the off-nadir resolution is degraded
  • the ground distance swept by the senor, IFOV is proportional to sec2θ, where θ is the angle of scan measured from the nadir
  • the details towards the edge of the scan get compressed
  • All of these
Q.16

Which one of the following factors does not affect the scale of the air photographs :

  • focal length
  • flying height
  • ground elevation
  • None of these
Q.17

The reflectance from a surface is called specular reflection if it follows: .

  • Snells's law
  • Lambert's cosine law
  • Planktan's law
  • All of these
Q.18

'A time varrying electric field produces a magnetic field.' This phenemenon is called:

  • Hertz's law
  • Ampere Maxwell's law
  • Faraday's law
  • Kirchoff s law
Q.19

While propagating through homogeneous, isotropic media,

  • directions of both the fields are orthogonal
  • both the fields are at right angles to the direction of propagation.
  • both (a) and (b)
  • niether (a) nor (b)
Q.20

Which one the following is a correct statement?

  • The vertical section of the soil extending into the parent material, is called profile
  • The layers of the soil parallel to the earth surface, are called horizons.
  • The transitional layer between two adjoining horizons, is called boundary.
  • All of these
Q.21

Pick up the correct statement from the following:

  • Phase of a wave is expressed as a fraction of a period with respect to a refrence
  • Phase is usually specified by angular measure with one period being 360°
  • The reference for finding the phase of a wave is taken from the previous passage through zero from the negative to the positive direction.
  • All of these
Q.22

'A time varrying electric field produces a magnetic field.' This phenemenon is called:

  • Hertz's law
  • Ampere Maxwell's law
  • Faraday's law
  • Kirchoff s law
Q.23

While propagating through homogeneous, isotropic media,

  • directions of both the fields are orthogonal
  • both the fields are at right angles to the direction of propagation.
  • both (a) and (b)
  • niether (a) nor (b)
Q.24

Which one of the following quantities forms the basis of radiometery?

  • Radiant energy (Q)
  • Radiant flux (φ)
  • Radiant intensity (I)
  • Radiance (L)
  • All of these
Q.25

Which one of the following statements is correct?

  • The function of an information system is to improve ones ability to make decisions
  • The information system is the chain of operations
  • A map is a collection of stored, analysed data, its stored information is suitability used in making decisions
  • All the above
Q.26

The maximum sun's radiation occurs around:

  • 0.4 μm wave length
  • 0.55 μ wave length
  • 0.7 μ wave length
  • None of these
Q.27

The interaction of the electromagnetic radiation produced with a specific wave length to illuminate a target on the terrain for studying its scattered radiance, is called:

  • passive remote sensing
  • active remote sensing
  • neutral remote sensing
  • None of these
Q.28

Pick up the correct statement from the following:

  • Photography was developed in 1826
  • Balloons were used as stable platform for aerial photography in 1903
  • The first aerial photography from an aerocraft was made by Willeur Wright in 1909 in Italy.
  • All of these
Q.29

Which one of the following statement is incorrect regarding the electromagnetic radiation?

  • These are produced by the motion of electric charge
  • The oscillation of charged particles sets up changing electric fields.
  • The changing electric fields induce the changing magnetic fields in the surrounding medium.
  • None of these
Q.30

Pick up the correct statement from the following :

  • The minimum frequency of light for which no electrons are emitted, is called threshold frequency.
  • Polarising angle of glass is 57°.5
  • At the polarising angle, the reflected and refracted rays are orthogonal
  • All the above
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