LET View Direction Movies The LET instrument has 16 viewing apertures and in these movies the boresights of these 16 sectors are shown in the RTN coordinate system. While these movies were specifically designed for LET, they can be used by anyone wishing to know something about the orientation of the spacecraft as a function of time. Three views are shown: a view from above the RT plane, a view from the Sun, and a third view from the side showing the NR plane. The data used to make the movies is taken from the STEREO pointing data, available from http://www.srl.caltech.edu/STEREO/attorb.html. The data can be either predicted data, in which case the word Predicted will appear on a frame of the movie, or the data can be actual data, in which case the word Actual appears. On 7 May 2018, these movies were changed from being Quicktime movies to being movies embedded in PowerPoint. Quicktime is no longer supported for persons using non-Mac computers; hence the change. Some of the PowerPoint files are very large and some degree of patience needs to be used to view the movies. For example, you may come upon the phrase "Cannot Play Media". That can be ignored; hit the play arrow. Then it may say "Loading..." That could take a minute or so. Finally, you may be confronted with a window entitled Media Object Upgrade. Answer No to the question asked and play the movie. Should work.