Q.1

Which one of the following statements is correct ?

  • Each satellite of the GPS system transmits two L band signals.
  • The two L band signals are modulated by the Pseudorandom binary codes (PN).
  • The GPS receiver reads the specific code of the satellite.
  • The PN code determines the time taken by the receiver to reach the receiver which is converted into distance
  • All of these
Q.2

Pick up the incorrect statement regarding the optical infrared region of the electromagnetic spectrum from the following :

  • visible region, 0.4 μm - 0.7 μm
  • short wave infrared region, 0.7 μ m - 1.5 μm
  • near infrared region, 1.5 μ m - 3.0 μm
  • microwave infrared region, 3.0 μ m - 8.0 μm
Q.3

In GPS, receivers are used are ;

  • electronic clocks
  • atomic clocks
  • quartz clocks
  • mechanical clocks
Q.4
Which one of the following relationship between the wave length (λ), and frequency and the speed (C) of the electromagnetic wave is correct?
  • C = v + λ
  • C = λ/v
  • C = vλ
  • C = 1/λv
Q.5
Pick up the important characteristic of a target which facilitates its identification from the following:
  • Spectral variation
  • Spatial variation
  • Temporal variation
  • All of these
Q.6
Which one of the following frequency regions is a part of sun's radiation?
  • Ultraviolet frequency region
  • Infrared frequency region
  • Radio frequency region
  • All of these
Q.7
Which one of the following helps to identify the objects on the earth surface?
  • Atmospheric window
  • Signature
  • Radiometric error
  • None of these
Q.8
The value of energy quantum for radiation of any frequency is proportional to:
  • The frequency
  • The reciprocal of the energy
  • The square of the frequency
  • The square root of the frequency
Q.9
The various stages occuring in GPS system are described below:Generation of an output to the userDetection of the GPS signalsProcessing the data in the built-in-computerDecoding the GPS signal.The correct sequence of the stages is:
  • 1, 2, 3, 4
  • 2, 3, 4, 1
  • 2, 4, 3, 1
  • 3, 1, 2, 4
Q.10
The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths:
  • 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
  • 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
  • 4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
  • All of these
Q.11
The altitudinal distance of a geostationary satellite from the earth is about:
  • 26,000 km
  • 30,000 km
  • 36,000 km
  • 44,000 km
Q.12
Which one of the following statements regarding remote sensing is correct?
  • The interaction of the electromagnetic radiation with the target
  • The emission of electromagnetic radiation from the target
  • Both (A) and (B)
  • Neither (A) nor (B)
Q.13
The object of photo-interpretation is:
  • Identification
  • Recognition of objects
  • Judging the significance of objects
  • All of these
Q.14
The code based GPS receivers are generally used for:
  • Vehicle tracking
  • Land navigation
  • Trans movement
  • All of these
Q.15
‘A’ and ‘B’ are two towers of equal height diametrically opposite on either side of the nadir point, at 3 km and 5 km distances. Which one of the following statements is correct?
  • Height displacement of A will be less than that of B
  • Height displacement of B will be less than that of A
  • Height displacement of A and B is equal
  • Height displacement of A and B will be towards each other
Q.16
Leaf reflectance depends primarily on:
  • The pigments
  • Internal cell structure
  • Equivalent water content
  • All of these
Q.17
Which one of the following statements is correct?
  • During the day, earth reflects solar radiation
  • During the day, earth reflects both solar radiations the emission from its surface
  • During the night, earth emits radiation from its surface
  • All of these
Q.18
The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:
  • Spectral variation
  • Spatial variation
  • Temporal variation
  • None of these
Q.19
Which one of the following quantities forms the basis of radiometry?
  • Radiant energy (Q)
  • Radiant flux (φ)
  • Radiant intensity (I)
  • All of these
Q.20
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.21
Orbital radius of GPS satellites is approximately:
  • 15,200 km
  • 26,600 km
  • 18,400 km
  • 36,000 km
Q.22
In the given figure the phase of
  • Crest A is π/2
  • B crossing is π
  • Trough C is 3π/2
  • All of these
Q.23
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.24
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.25
Electromagnetic radiation:
  • Produces a time varying magnetic field and vice versa
  • Once generated, remains self-propagating
  • Is capable to travel across space
  • All of these
Q.26
In case of reflection and refraction of electromagnetic radiation,
  • Angle of incidence = angle of refraction
  • Angle of incidence = angle of reflection
  • Angle of refraction = sum of the angles of incidence and refraction
  • All the above
Q.27
If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height
  • h = dp/(B/H)
  • h = (B/H) dp
  • h = dp/(H/B)
  • h = (H/B) dp
Q.28
Geodimeter is based on:
  • Propagation of modulated light waves
  • Propagation of infrared radiation
  • The visible light as carrier with frequency of the order of 5 × 1014 Hz
  • High frequency radio waves
Q.29
In GPS, receivers are used are;
  • Electronic clocks
  • Atomic clocks
  • Quartz clocks
  • Mechanical clocks
Q.30
Which one of the following geometric errors of satellite sensors is random?
  • Scan skew
  • Panoramic distortion
  • Earth rotation
  • Altitude variation
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