Part 4—Download Software and Data
Step 1 Download and Install ImageJ SoftwareImageJ is in the public domain. It can be freely downloaded and installed on any computer including those at schools, homes, and businesses.
- Go to the ImageJ Download page and open it in a new window.
- Click the link that appears directly below the name of your computer's operating system (e.g., Mac, Linux, Windows). This action will transfer a compressed file of the software to your computer. Your browser should automatically expand the file, creating an ImageJ folder on your computer's hard drive. For more detailed instructions from the ImageJ website, click Installation Instructions , then select your operating system.
Step 2 Update or Downgrade ImageJ
Double-click the ImageJ icon to launch the application and choose Help > Update > ImageJ.... A window will appear, telling you the version you are currently running and a list of upgrade versions. Choose the version you want to upgrade to (usually the most recent, or default version) and click OK. After the update downloads, you will need to re-launch ImageJ to run the new version.
ImageJ is a professional research and analysis tool, and is under constant development. If the latest update of the application introduces new bugs or errors, or has an unfamiliar interface that does not match written instructions, you can downgrade your copy of ImageJ to an older, more stable or familiar version.
Step 3 Conduct a GOES Image Search at NOAA
Step 4 Download a Sequence of Images From the GOES 21-Day Archive
- Make a selection from each of the categories to identify a specific GOES image, then click the button labeled Submit Choice to open the image. Save the image to your computer by clicking on the image while holding down the Control key (Mac) or using the right-click (PC).
- In general, the archive holds images for the previous 21 days. If, on a Thursday for example, you select Tuesday for the Day and 3rd Week Ago for the Week, there may be no image available.
- As noted above, time is designated using a 24-hour clock in ZULU or UTC time. While infrared and water vapor images are independent of sunlight and are available for 24 hours a day, visible light images are available just during daylight hours. So, at 0900Z the entire United States may still be dark, and the West Coast may not have sunlight until after 1300Z.
- Unlike the real-time GOES images, which are available at 15 minute intervals, the archived GOES images are available at 30 minute intervals.
- Use the Back button to navigate back to the GOES Image Search template and download 5 additional images. For each new download, advance the time by one hour, but do not change any other variables. Make a folder to hold the downloaded images. This six-hour sequence of images is what you will use to build an animation, so make sure you have a set of images you are pleased with.