5. (2 points) Assume you have a portion of a Landsat 7(ETM+) scene covering the Durham County, NC. Some pertinent information about the image includes: Path: 16 Row: 35 Acquisition Date: July 27, 2002 Start Time Stop Time 2002:208:15:41:26.9259374 2002:208:15:41:54.0019999 Solar Zenith Angle: 28.10970201 (the solar elevation is 61.89029799) As the Lab#6, you select target C and D at pixel location (323, 956) and (345, 916) and get the following pixel values(DN) at four different bands: 4) Target C Target D Band 1 72 65 Target A Target B Band 2 72 65 1) Examine spectral data in the table above (wavelength versus DN) for target C and D. and determine land cover type (vegetation or building) for each of them based on their spectral characteristics. State your reasoning. 2) As in Lab#6 exercise, you calculated Gain and B values: G=0.639764 B = =-5.1 for Band 4 and G=0.621653 B=-5.0 for Band 3. Instead of using ENVI software use the Gain, B value and formula you used in the Lab#6 to calculate the radiance for Target C and D. Band 3 Target A Target B Band 3 Band 3 72 65 Band 4 3) Assume Solar Spectral Irradiances for band 3 and 4 are 1533 and 1039 watts/(meter squared * um) respectively. Instead of using ENVI software, use parameters such as solar zenith angle and formula you used in the Lab#6 to calculate the reflectance and NDVI value for Target C and D. Band 4 207 106 Band 4 ENVI