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Be conscious of the fact that the many components of

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be conscious of the fact that the many components of the remote sensing process cannot be isolated from one another. This means that the interpreter must know the remote sensing system and the subject of the interpretation. ROLE OF THE ATMOSPHERE - All energy reaching the remote sensing instrument must pass through a portion of the Earth's atmosphere. The Sun's energy is altered in intensity and wavelength by particles and gases in the Earth's atmosphere. These changes appear on the image in ways that degrade image quality or influence the accuracy of interpretation. The Atmosphere is 90% of the total signal.
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16 1. Spectral Differentiation 2. Radiometric Differentiation 3. Spatial Differentiation 4. Geometric Transformation 5. Interchangeability of Pictorial to Digital Formats 6. Remote Sensing Instrumentation Acts as a System 7. Role of the Atmosphere 1. SPECTRAL RESOLUTION: This refers to the number of bands in the spectrum in which the instrument can take measurements. Landsat TM = 7 channels 2. RADIOMETRIC RESOLUTION: This is the sensitivity to small differences in the radiation of an observed object . Landsat TM = 8 bit 3. SPATIAL RESOLUTION: This represents the ability of the sensor to detect and distinguish small objects and fine detail in larger objects. Depends on the instrument's sensitivity and distance from the object, and defines the pixel size of a digital image. Landsat TM = 30m 4. TEMPORAL RESOLUTION: Represents the frequency with which a satellite can re visit an area of interest and acquire a new image. Depends on the instrument's field of vision, and the satellite's orbit. Landsat TM 16 days
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17 1. Read Chapter 1 and answer the review questions 2, 4, and 8 (at the end of the chapter). 2. Read Chapter 2.
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