STScI Logo

Hubble Space Telescope
DrizzlePac: Instructional Movies

Created by Ron Downes, Brad Whitmore, Warren Hack, and Jennifer Mack

The aim of these tutorials is to show users how to align, combine, and perform cosmic-ray rejection on multiple images with the TWEAKREG and ASTRODRIZZLE tasks via worked examples.

Need plug-in: If these movies do not work at all, you may need to download the browser plug-in MacroMedia Shockwave/Flash Player. You should have Shockwave 7.0 or higher. (In Netscape and Mozilla you can check your version by clicking on "About Plugins" in the Help menu.) Volume: You may need to adjust the audio on your machine to a comfortable level. Replaying: If you would like to replay a section of the movie, note that there is a cursor at the bottom of the screen that you can drag forward or backward to change where you are in the movie. More help: If you are having trouble learning to use APT even after viewing the appropriate movies, please contact us (through