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1) Which one of the following errors is produced by platform characteristics of the sensor ? a. Altitude variation b. Altitude c. Orbit drift d. All of these
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2) Leaf reflectance depends primarily on______________? a. The pigments b. Internal cell structur c. Equivalent water content d. All of these
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3) Critical angle of electromagnetic radiation takes place if__________________? a. Angle of incidence is equal to angle of refraction b. Angle of incidence is greater than the angle of refraction c. Angle of incidence is equal to 90° d. Angle of refraction is equal to 90°
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4) Which one of the following residual biases involves the GPS accuracy ? a. Satellite dependent biases due to uncertainty in the orbital parameters of the satellite b. Receiver -dependent biases due to clock stability with line c. Signal propagation biases due to the sphere and troposphere propagation d. All the above
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5) The entire range of the electromagnetic spectrum spans a large spectrum of wave lengths varying from__________________? a. 10-10 to 106 m b. 10-8 to 106 m c. 10-10 to 1010 m d. 10-8 to 108 m
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6) Consider the following statements regarding the satellite imaging_________________?
1. The satellite orbit is fixed in the inertial space 2. During successive across-track imaging, the earth rotates beneath the sensor 3. The satellite images a skewed area Which one of the following statements is/are correct? a. 1, 2, 3 b. 1, 3 c. 2, 3 d. 1, 2
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7) 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? a. Height displacement of A will be less than that of B b. Height displacement of B will be less than that of A c. Height displacement of A and B is equal d. Height displacement of A and B will be towards each other
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8) Electromagnetic radiation_______________? a. Produces a time varying magnetic field and vice versa b. Once generated, remains self-propagating c. Is capable to travel across space d. All of these
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9) DGPS is based on the concept that bias errors in the position of locations in a given local area, are same if their distances are within___________________? a. 25 km b. 50 km c. 75 km d. 100 km
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10) Earth observations from a satellite platform provide____________? a. Synoptic view of a large area b. Constant solar zenith angles and similar illumination conditions c. Repetitive observations of the same area with intervals of a few minutes to a few weeks d. All of these
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