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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