Lab_2_Orbital_Geometry-1 - University of Denver Dr Keables...

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University of Denver NATS 1201 Dr. Keables Environmental Systems Name:____Chris Wetzig______________________ Lab 2Day/Time:__wed 3____________________ Lab Exercise 2 Orbital Geometry and Variations in Solar Radiation Receipt This lab exercise makes use of a computer program called GeoClock , which is designed to demonstrate the relationship between orbital geometry and variations in the receipt of solar radiation, and a simple daily global solar radiation model. Upon completion of this exercise you will have a better grasp of the role that the earth’s orbital geometry plays on the daily and annual cycles of solar radiation receipt. Download the Programs. Create a subfolder in your NATS1201 folder called “Lab 2.” Download and install GeoClock: o Create a subfolder in Lab 2 call “GeoClock.” o Download GeoClock from the lab website (right-click on the link, Save As) and save it in the GeoClock folder. o Double-click on the file you just downloaded, accept the agreement in WinZip, select Extract , navigate to the GeoClock folder, and specify GeoClock for the Extract To filename. o Close WinZip. Download Solar Radiation Data Excel spreadsheet o Right-click on the link, Save As, and save it to your Lab 2 folder. A. Visualization of Variations in Solar Radiation. In this first part of the exercise you will use a computer simulation of the earth rotation and earth-sun geometry called GeoClock to visualize their impact on the receipt of solar radiation. Running GeoClock . In the GeoClock folder, open the file “GEOCKWIN” and click on Continue (this program is shareware…you may register later if you wish to purchase the program.) Close the Help Window (if it opens.) When GeoClock starts up, you should see a set up window called GeoClock Setup . Do the following to set Denver as the Hometown:
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Click the Setup using City List button Find and select Denver Click OK Click Save You should now see a color map of the world: the illuminated and dark portions of the map correspond to the orbital geometry conditions set by the time on the internal clock of the computer. Take a few minutes to familiarize yourself with the text at the bottom of the screen and the map. For a given location (which you can specify) at a specific date and time, information on the sun’s azimuth (compass direction) and elevation (distance above the horizon), time of sunrise and sunset, and the latitude and longitude of the subsolar point are displayed. Also, familiarize yourself with the menu at the top of the screen. Feel free to experiment!! Configure GeoClock . Click on Reset to reset the program to its original configuration and make the following adjustments. Display the world map projection by selecting
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Lab_2_Orbital_Geometry-1 - University of Denver Dr Keables...

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