Elements Of Remote Sensing

This is an MCQ-based quiz on Elements Of Remote Sensing.

This includes Focal length, Flying height, Ground elevation, and Frequency.

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Orbital radius of GPS satellites is approximately:

15,200 km 26,600 km 18,400 km 36,000 km

Spatial variation in horizontal and vertical directions is caused due to:

Physical weathering of rocks Chemical weathering of rocks Biological weathering of rocks All of these

Which one of the following quantities forms the basis of radiometry?

Radiant energy (Q) Radiant flux (φ) Radiant intensity (I) All of these

The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:

Spectral variation Spatial variation Temporal variation None of these

Which one of the following statements is correct?

During the day, earth reflects solar radiation During the day, earth reflects both solar radiations the emission from its surface During the night, earth emits radiation from its surface All of these

The code based GPS receivers are generally used for:

Vehicle tracking Land navigation Trans movement All 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)

The object of photo-interpretation is:

Identification Recognition of objects Judging the significance of objects All of these

The various stages occuring in GPS system are described below: 1. Generation of an output to the user 2. Detection of the GPS signals 3. Processing the data in the built-in-computer 4. Decoding the GPS signal.The correct sequence of the stages is:

1, 2, 3, 4 2, 3, 4, 1 2, 4, 3, 1 3, 1, 2, 4

Pick up correct statement from the following:

A graphical representation of spectral reflectance verses the various growth stages of a crop, depicts a phonologic pattern The changes in the polarization of the radiation reflected or emitted by an object, is known as polarization variation The degree of polarization is a characteristic of the object which helps in the identification of the object All of these

The basic requirement of any sensor system is ..........

Spatial resolution Spectral resolution Radiometric resolution All of the above

The value of energy quantum for radiation of any frequency is proportional to -

The frequency The square of the frequency The reciprocal of the energy The square root of the frequency

Coherence of two electromagnetic waves takes place if their phase difference is ............

Constant in time Constant in space Both A & B None of the above

Which one of the following frequency regions is a part of sun"s radiation?

Visible frequency region Radio frequency region Infrared frequency region All of the above

Remote sensing includes gathering of

Sounds Images Changes Movements

The altitudinal distance of a geostationary satellite from the earth is about ..................

26,000 km 30,000 km 34,000 km 36,000 km