Elements Of Remote Sensing Objective Questions and Answers

29. The changes in the reflectivity/emissivity with time, is called :

30. Pick up the correct statement from the following :

A. A graphical representation of spectral reflectance versis the various growth stages of a crop, depicts a phenologie pattern

B. The changes in the polarisation of the radiation reflected or emitted by an object, is known as polarisation variation,

C. The degree of polarisation is a characteristic of the object which helps in the identification of the object.

D. All of these

Discussion

31. The instruments which provide electromagnetic radiation of specified wave length or a band of wave lengths to illuminate the earth surface, are called :

32. The basic requirement of any sensor system, is :

A. radiometric resolution

B. spatial resolution

C. spectral resolution

D. All of these

Discussion

33. Pick up the correct statement from the following :

A. In remote sensing technique, the observation place, is called a platform

B. Platforms may be either stationary or mobile

C. Spatial resolutr of the imaging system becomes poorer with inc ase of platform height.

D. All of these

Discussion

34. Earth observations from a satellite platform provides:

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

Discussion

35. Repetitive observations of the same area at equal interval of time, are useful to monitor the dynamic phenomena :

Civil Engineering Objective Questions { Elements Of Remote Sensing }