Which one of the following residual biases involves the GPS accuracy? Signal propagation biases due to the sphere and troposphere propagation Satellite dependent biases due to uncertainty in the orbital parameters of the satellite All listed here Receiver-dependent biases due to clock stability with line TRUE ANSWER : ? YOUR ANSWER : ?
Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects: Electromagnetic waves Electric waves Wind waves Sound waves TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following geometric errors of satellite sensors is random? Altitude variation Panoramic distortion Earth rotation Scan skew TRUE ANSWER : ? YOUR ANSWER : ?
The reflection of solar energy is characterized by the water content in the leaf, in the reflective optical infrared: Visible (0.4 - 0.7 μm) region Near-IR (0.7 - 1.3 μm) region None of these Short wave-IR (1.3 - 2.7 μm) region TRUE ANSWER : ? YOUR ANSWER : ?
The basic requirement of any sensor system is: Spectral resolution All of these Spatial resolution Radiometric resolution TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following factors does not affect the scale of the air photographs? Flying height None of these Ground elevation Focal length TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following frequency regions is a part of sun's radiation? All of these Infrared frequency region Radio frequency region Ultraviolet frequency region TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following parameters is considered to determine the reflectance of a vegetation canopy? Look angle All of these Solar zenith angle Azimuth angle TRUE ANSWER : ? YOUR ANSWER : ?
The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface are called: Sensors Passive sensors Active sensors None of these TRUE ANSWER : ? YOUR ANSWER : ?
For C band Synthetic Aperture Radar (SAR) with Doppler band width of 1300 Hz, the coherence length loch is: 130 km 230 km 250 km 500 km TRUE ANSWER : ? YOUR ANSWER : ?