A full description of these files are given in the Exam 2 write-up sent to you via email. Download the following files to a subdirectory where you wish to carry out these calculations (i.e. the so-called working directory). Double click on each of the files listed.
IMPORTANT NOTE: Due to OIT's paranoia about security issues, files ending in either ".dat" (standard Unix data files) and ".pro" (IDL procedure and function files) will not show up on a web browser even though those files exist on the web server disk. To counteract this, I have changed the name of all ".pro" files to ".txt" files. Note that after you download a given IDL procedure or function file from this web site to your IDL working directory on your PC, immediately rename it to its ".pro" name as shown on web page link. For instance, when you click on "orbitsfinal.pro", this will save this file to your IDL working directory as "orbitsfinal.txt". Once on your home machine, rename it to "orbitsfinal.pro" from a DOS emulator (if using MS Windows) or the Linux "command prompt" terminal window.
| orbitsfinal.pro | IDL driver code to carry out the calculations and generate the plots. |
| orbeqnfinal.pro | Supplies ORBITSFINAL and RK4 with the derivative equations. |
| orbplot.pro | IDL procedure to creates polar plots of an orbit. |
| orbticks.pro | Determines the tick marks for orbit plots. |
Note that students will have to supply the correct coding for the differential equations in the ORBEQNFINAL function as explained in this code and on the Exam 2 write-up sent via email.