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
Which one of the following residual biases involves the GPS accuracy ?
-
Satellite dependent baises due to uncertainty in the orbital parameters of the satellite. -
Receiver-depandent biases due to clock stability with line -
Signal propagation baises due to the sphere and troposphere propogation. -
All the above
Remote sensing techniques makes use of the properties of-----emitted, reflected or diffracted by the sensed objects:
-
electric waves -
soundwaves -
electromagnetic waves -
wind waves
Pick up the correct definition from the following with response to GIS.
-
Common boundry between two areas of a locality is known as adjacency. -
The area features which are wholly contained within another area feature, is known so containment. -
The geometric property which describes the linkage between line features is defined as connectivity. -
All of these.
Which one of the following parameters is accurate for DGPS.
-
Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station -
Positional accuracies ~ 2 - 5m if rover is less than 2-5 fm from the reference station -
Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station -
Positional accuracies ~ 5 - 10 m if rover is less than 25 km
Which one of the following errors is produced by platform characteristics of the sensor ?
-
altitude variation -
altitude -
orbit drift -
All of these
The most widely used antenna in GPS is
-
Parabolid antenna -
Microstrip antenna -
Horn antenna -
Slotted antenna
The coherence length over which there is a strong relationship between amplitudes is;
-
directly proportional to the bandwidth -
inversely proportional to the bandwidth -
the square of the bandwidth -
none of these
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)
In the given figure the phase of 
-
crest A is π/2 -
B crossing is π -
trough C is 3 π/2 -
All of these
The various stages of formation of snow are listed below :
Formation of ice crystals
Formation of snow pallets
Formation of snow flakes
Formationof snow crystals
Formation of rimed crystals
Which one of the following sequences is correct ?
-
3 2 5 1 4 -
5 3 1 2 4 -
1 4 3 5 2 -
1 3 4 2 5
"All bodies at temperatures above absolute zero degree emit electromagnetic radiation at different wave length", is known as:
-
Plank's law -
Planktan's law -
Lambert's cosine law -
None of these
Which one of the following is incorrect statement? While passing through the atmosphere, the solar radiation,
-
remains unaffected -
gets scattered -
gets absorbed partially -
None of these
Phytoplanktons :
-
are microscopic plants -
are the first link in all the aquatic and marine food chains -
convert solar energy, dissolved carbon and nitrogen into organic biomass -
All of these
Snow consists of
-
snow crystals -
rimed snow crystals -
snow flakes -
All of these
In which part of the reflective optical infrared region, the effect of multiple leaves in vegetation canopy is maximum ?
-
The near-IR (0.7 - 1.3 μm) region -
The visible (0.4 - 0.7 μm) region -
The short wave IR (1.3 - 2.7 μm) region -
In all the above region
The leaf area index (LAI) is :
-
one sided leaf area per unit area of the ground -
two sided leaf area per -unit area of the ground -
the average of the two sided area per unit area of the ground -
None of these
The maximum absorption of solar radiation due to ozone occurs at wave lengths:
-
shorter than 0.3 μm -
shorter than 0.2 μm -
greater than 0.3 μm -
None of these
For perfect coherent radiation, which one of the following statement is correct?
-
Both the waves must have single frequencies -
The directions of motion of both waves are parallel. -
The waves must be collimated -
All of these
Which one of the following statements is correct ?
-
The ratio of the permitivity of a medium and the free space, is called relative permitivity. -
Dielectric constant is a pure number and has no dimensions. -
The dielectric constant of pure water is 80. -
Higher the dielectric constant of a medium, the poorer is its electric conductivity. -
All of these
In sun-light water poor in phyto plank tons appears :
-
deep blue -
red -
green -
yellow