Remote Sensing Questions Chapter 1

1. What is reconnaissance from a distance?
2. What is the opposite from remote sensing?
3. What are the two major components of remote sensing?
4. What two models are used to describe the dual nature of EMR?
5. List the types of radiation from shortwave to longwave.
6. To the nearest 10%, what fraction of the electromagnetic spectrum is visible light?
7. What three bands of the electromagnetic spectrum are used in remote sensing?
8. Why does terrestrial remote sensing rely only on near UV rather than all UV radiation?
9. List the colors of the visible spectrum from longest to shortest.
10. What are the three additive primary colors?
11. What happens to make up the color of objects which we see?
12. What are the two types of IR used in remote sensing?
13. What band is the longest wavelength used in terrestrial remote sensing?
14. What are the two types of microwave systems used in terrestrial remote sensing?
15. About what percentage of the sun's radiation falls in the visible band?
16. Comparing solar radiation to terrestrial radiation, which has the longer wavelength?
17. What are the three states of matter naturally occurring on earth?
18. What four things can happen to EMR when it strikes matter?
19. What happens to radiation when it is absorbed?
20. Compare the difference in the way fresh snow and bare asphalt react to incident radiation.
21. Describe the three ways the EMR interacts with the atmosphere.
22. List the elements of the earth's albedo and their percentage of total radiation intercepted.
23. List the elements of the earth's atmospheric gain and their percentage of total radiation intercepted.
24. What two gases are most important for absorption bands?
25. Why do cloudy nights tend to be warmer than clear nights?
26. What agents in the atmosphere are most important for scattering?
27. What type of scattering makes the sky blue?
28. What two types of scattering makes for red sunrises and sunsets?
29. What prevents darkness in shadows?
30. What are the two components of radiation reaching an airborne or spaceborne sensor?
31. In the formula S=Ss + Sa, which acts as a masking agent?
32. Which wavelengths are most masked?
33. Why are photographs from a plane at a higher altitude often less clear than at a lower altitude?
34. How can the quality of photographs be increased during hazy periods?
35. What is the percentage amount of the earth's albedo?
36. What four types of surfaces have the highest albedo?
37. What three types of surfaces have the lowest albedo?
38. Which better absorbs UV radiation, a white toboggan or snow?
39. Why would people stand out from vegetation in a thermal infrared photo?
40. How can a spectral signature curve be used to determine the best sensor for discrimination?
41. What are two broad categories of remote sensors exemplified by spectroradiometers and photographic cameras?
42. What are the five main groups of imaging systems?
43. Which three are passive remote sensors?
44. Which two are active remote sensors?
45. Which has a wider imaging range, human eyes or cameras?
46. Differentiate between sonar and radar.
47. What are the two most common uses of multitemporal remote sensing?
48. What is the important two volume set published by the American Society of Photogrammetry and Remote Sensing?
49. Question 6 from the textbook
50. Question 7 from the textbook
51. Question 8 from the textbook