The code based GPS receivers are generally used for_________________?
(A) Vehicle tracking
(B) Land navigation
(C) Trans movement
(D) All of these
The normal altitude of GPS satellite is about________________?
(A) 16,200 km
(B) 20,200 km
(C) 24,400 km
(D) 36,100 km
The GPS space segment consists of Navigation Satellite Timing and Ranging whose number is_______________?
(A) 8
(B) 12
(C) 16
(D) 24
Pick up the important characteristic of a target which facilitates its identification from the following ?
(A) Spectral variation
(B) Spatial variation
(C) Temporal variation
(D) All of these
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
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
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
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
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
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°