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Remote Sensing Question Paper
Remote Sensing
Course:Bachelor Of Science In Water And Environmental Engineering
Institution: Kenyatta University question papers
Exam Year:2008
KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2007/2008
INSTITUTE OF OPEN LEARNING
SECOND SEMESTER EXAMINATION FOR THE DEGREE OF
BACHELOR OF SCIENCE IN WATER AND ENVIRONMENTAL ENGINEERING
SET 529: REMOTE SENSING
DATE: Thursday 10th July 2008 TIME: 8.00am – 10.00am
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INSTRUCTIONS: Attempt question ONE and any other TWO questions
Question One
(a) Define remote sensing and mention its importance in data analysis. [2 marks]
(b) Differentiate between active and passive sensor. [4 marks]
(c) Explain why most remote sensing systems avoid detecting and recording wavelengths
in the ultraviolet and blue portions in the spectrum? [7 marks]
(d) What advantages do sensors carried on board satellite have over those carried on
aircraft? Are there any disadvantages that you can think of? [7 marks]
(e) Explain what microwave remote sensing is, by highlighting the wavelength range
involved, some of the applications, advantages over other types of remote sensing and
challenges, if any. [10 marks]
(f) Discuss any five basic characteristics of an image that are vital for interpretation
process. [10 marks]
Question Two
(a) Discuss advantages and limitations of remote sensing. [14 marks]
(b) Define the following terms as used in remote sensing.
(i) Scattering
(ii) Rayleigh scattering
(iii) Mie scattering
(iv) Absorption [12 marks]
(c) Define spectral reflectance? Why is it important in remote sensing? [4 marks]
Question Three
(a) What is an atmosphere windows? If you wanted to monitor the general health of all the vegetation cover over the Mau Forest for several months, what type of platform and sensor characteristics (spatial, spectral and temporal resolution) would be the best for this task and why?
(b) Differentiate between the following pairs of terms:
(i) Radiometric and spectral resolution
(ii) Geostationary orbit and sun – synchronous orbit
(iii) Diffuse and spectacular reflection
(iv) Radiometric and Geometric correction
(v) Photograph and an Image. [10 marks]
(c) (i) Define resolving as used in satellite remote sensing. [2 marks]
(ii) Mention different type of resolving power or sensor resolutions.[8 marks]
(d) Compare manual interpretation of imagery and digital image processing.[4 marks]
Question Four
(a) (i) Define image interpretation. [2 marks]
(ii) With an aid of a typical flow diagram explain the process of image interpretation process. [10 marks]
(b) Remotely sensed data are usually digital image data hence data processing is treated as digital image processing. With an aid of a flow diagram, show digital image processing. [10 marks]
(c) Discuss the process of image classification in satellite remote sensing. [8 marks]
Question Five
Discuss application of remote sensing in the following areas:
(a) Agriculture
(b) Land use
(c) Land cover mapping
(d) Land cover change
(e) Water pollution. [30 marks]
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