Remote Sensing Questions Chapter 6

  1. What are the major types of electro-optical sensors?
  2. What are the advantages of electro-optical imaging systems over photographic cameras?
  3. What bands are associated with a four camera array?
  4. What is shown in the color IR video camera image of plate 6?
  5. What are three acronyms for solid state detectors?
  6. What are the three advantages of video systems?
  7. What are the two primary types of across-track scanners?
  8. How do whiskbroom scanners view new area?
  9. How is ground swath calculated?
  10. How do the cell sizes differ on the margins compared to the center?
  11. When spatial detail is necessary, what IFOV is mandatory?
  12. When can an object be independently resolved?
  13. What does a small IFOV restrict?
  14. In what bands can a multispectral scanner operate simultaneously?
  15. What three types of radiation detectors are used in MSS?
  16. What are the four operational features of MSS?
  17. What is the purpose of the Matra Thematic Scanner?
  18. What wavelengths are scanned by thermal infrared scanners?
  19. What is TIMS?
  20. Identify three metallic elements used to detect selective wavelengths.
  21. What are the two types of broadband thermal infrared scanners?
  22. How do calibrated infrared scanners differ from uncalibrated?
  23. In clear, dry weather, how accurate is the Daedalus calibrated system?
  24. Describe the geometric distortion of across-track scanners.
  25. Why are panoramic images only suitable for interpretation rather than measurement?
  26. What type of image distortion can not be corrected?
  27. Describe the relief displacement of across-track scanners.
  28. What factors increase this distortion?
  29. How do pushbroom scanners function without a mirror?
  30. How do pushbroom scanners image new area?
  31. In a pushbroom scanner, what determines the swath width?
  32. What are the advantages of a pushbroom scanner over a whiskbroom scanner?
  33. What is a disadvantage?
  34. Identify two pushbroom scanners.
  35. What instrument measures kinetic temperature?
  36. How does the total energy of emitted black body radiation change as temperature increases?
  37. Which are better emitters and absorbers, dark or light colored objects?
  38. Which has a lower emissivity, a smooth or a rough surface?
  39. What establishes the radiant temperature of an object?
  40. How does the thermal storage capability of water compare to most other materials?
  41. Which will be warmer during the day, basalt or granite?
  42. Which will be warmer during the night, basalt or granite?
  43. Describe the termal inertia of dry, porous material.
  44. As thermal inertia increases, what happens to the temperature differences?
  45. What is delta T?
  46. How does the temperature of land usually compare to the water during the day?
  47. How does the temperature of land usually compare to the water during the night?
  48. What is the effect of high wind on temperatures?
  49. What is the effect of rain, dew, and frost on temperatures?
  50. Of clouds, fog, dust, and smoke, which mask thermal IR emissions?
  51. Do the shadows of clouds influence thermal IR measurements?
  52. How does high humidity effect thermal IR measurements?
  53. When are temperature inversions problematic?
  54. What weather conditions are best for thermal IR imaging?
  55. When is the best time of day usually for thermal IR imaging?
  56. When does the largest thermal contrast usually occur?
  57. Why is topography enhanced during daytime thermal IR imaging?
  58. How do thermal IR images show warmer temperatures?
  59. What can show on thermal IR images whether it is day or night?
  60. Why does above ground vegetation appear cool during the day?
  61. How does the temperature of consolidated materials compare to unconsolidated materials?
  62. How does the temperature of pavement compare between day and night?
  63. How does the temperature of metal surfaces compare between day and night?
  64. What types of covered features may be visible by thermal IR?
  65. What are four applications of thermal IR in geology?
  66. What are two environmental applications of thermal IR?
  67. What are four soil moisture applications of thermal IR?
  68. Why is thermal IR important for detecting and monitoring forest fires?
  69. What is one of the fastest growing applications of aerial thermal IR sensing?
  70. What are the two types of earth observation satellites?
  71. What was the original name of the Landsat program?
  72. What is EOSAT, and why is it important?
  73. What types of sensors have been used on the Landsat program?
  74. How often did the early Landsat satellites return to the same location?
  75. What is meant by a sun-synchronous orbit?
  76. How often did Landsat 4 and 5 return to the same place?
  77. What was the ground resolution of the TM in Landsat 4 and 5?
  78. How many bands did the MSS sweep?
  79. How wide was the across-track swath of the MSS in the early Landsats?
  80. How did this differ in Landsats 4 and 5?
  81. What is the shape of a Landsat MSS image?
  82. What band is best for studying water features?
  83. For what is band 5 best?
  84. For what are bands 6 and 7 useful?
  85. How is color infrared composite made?
  86. What are the typical color associations for color composite images?
  87. Is a RBV scene skewed?
  88. What are the strengths of band 1 on the TM?
  89. To what is band 2 sensitive?
  90. For what is band 3 best suited?
  91. For what is band 4 best suited?
  92. For what is band 5 best suited?
  93. For what is band 6 best suited?
  94. For what is band 7 best suited?
  95. What bands are not affected by atmospheric haze?
  96. How many three band composites can be produced?
  97. What three bands make a composite useful for rock discrimination?
  98. What new instruments were associated with Landsat 6?
  99. How is Landsat data returned to earth?
  100. Where is the EROS data center located?
  101. What data is collected for each image?
  102. When did acquisition of Landsat data begin?
  103. When was the first SPOT launched?
  104. What are the advantages of SPOT off-nadir viewing?
  105. What other countries have similar satellite programs?
  106. On thermal infrared images fro the Metsats, how are high, cold clouds depicted?
  107. What are the five functions of NOAA weather satellites?
  108. What organization is associated with the Nimbus program and the CZCS?
  109. What is the equation for figuring the number of different color composites from single band images in groups of three?
  110. Answer question 1 on page 158.
  111. Answer question 2 on page 158.
  112. Answer question 3 on page 158.
  113. Answer question 4 on page 158.
  114. Answer question 5 on page 158.
  115. Answer question 6 on page 159.
  116. Answer question 7 on page 159.
  117. Answer question 8 on page 159.
  118. Answer question 9 on page 159.