Lab exercise 2, due right before the class on September 7, 2005
EES5053: Remote Sensing. Earth and Environmental Science, UTSA
http://www.utsa.edu/LRSG/

Student Name: ___________________

 Please include the procedures of your calculation. if it is difficult to type the equations and procedures in computer, you can use handwriting for this lab. but please type it clearly.

1. Use Stefan-Boltzmann Law to calculate the radiation energy emitted from the Sun, the Earth, and the Mars. Given the average surface temperatures of the Sun, Earth, and Mars are 6000 K, 300 K, and 210 K, respectively. 
2. Based on the results of question 1, calculate the energy fraction of the Earth and Mars compared with the Sun. 
3. Given the average surface temperature of Mars is 210 K. Please calculate the wavelength of the peak radiation of Mars. what are the peak wavelength of the Sun and the Earth? discuss the wavelength differences and energy content differences among them using the quantum theory.
4. Using the interaction theory between EMR and atmosphere to explain why clouds in sunny days look white, not blue or red? What color the rain clouds look like? Why? Explain the clear sky looks blue, why sunrise and sunset looks red? Explain why a thick cloud is white as viewed from above and dark gray as seen from beneath. If there is no scattering in the atmosphere, what will the clear sky look like? Why? (Suppose you do not look directly at the sun).
5. There are two systems: (1) C band active radar system, which is a normal system in both satellite and airborne based remote sensors, (2) 0.3 mm (ultraviolet) active Lidar system. Please calculate the energy content of these two systems. Which has larger energy content? How many times larger ? (Based on the lecture slides, you can find the wavelength range of C band, then you can use the center wavelength of the C band for your calculation).