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___________________?

Related Mcqs:

1. The coherence length over which there is a strong relationship between amplitudes is_________________?

   A. Directly proportional to the bandwidth
   B. Inversely proportional to the bandwidth
   C. The square of the bandwidth
   D. None of these

2. 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

3. Coherence of two electromagnetic waves takes place if their phase difference is_________________?

   A. Constant in time
   B. Constant in space
   C. Constant in time and space
   D. None of these

4. For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is_____________?

   A. 130 km
   B. 230 km
   C. 250 km
   D. 500 km

5. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called________________?

   A. Sensors
   B. Passive sensors
   C. Active sensors
   D. None of these

6. 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____________________?

   A. Passive remote sensing
   B. Active remote sensing
   C. Neutral remote sensing
   D. None of these

7. Which one of the following factors does not affect the scale of the air photographs ?

   A. Focal length
   B. Flying height
   C. Ground elevation
   D. None of these

8. “An Electromagnetic wave falls on to a boundary between two losses less homogeneous media with different refractive indices, a part of the wave is reflected back to the incident medium and the rest is transmitted on to the second media”. This phenomenon is known as___________________?

   A. Fresnel reflection
   B. Fresnel refraction
   C. Snell’s law
   D. None of these

9. The reflection of solar energy is characterised by the water content in the leaf, in the reflective optical infrared______________?

   A. Visible (0.4 –
   B. Near-IR (0.7 –
   C. Short wave-IR (1.3 –
   D. None of these

10. In GPS, receivers used are___________________?

    A. Electronic clocks
    B. Atomic clocks
    C. Quartz clocks
    D. Mechanical clocks